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control system</title> <meta name="description" content="Search results for: passive control system"> <meta name="keywords" content="passive control system"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="passive control system"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 25708</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: passive control system</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25708</span> Optimum Parameter of a Viscous Damper for Seismic and Wind Vibration </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soltani%20Amir">Soltani Amir</a>, <a href="https://publications.waset.org/abstracts/search?q=Hu%20Jiaxin"> Hu Jiaxin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Determination of optimal parameters of a passive control system device is the primary objective of this study. Expanding upon the use of control devices in wind and earthquake hazard reduction has led to development of various control systems. The advantage of non-linearity characteristics in a passive control device and the optimal control method using LQR algorithm are explained in this study. Finally, this paper introduces a simple approach to determine optimum parameters of a nonlinear viscous damper for vibration control of structures. A MATLAB program is used to produce the dynamic motion of the structure considering the stiffness matrix of the SDOF frame and the non-linear damping effect. This study concluded that the proposed system (variable damping system) has better performance in system response control than a linear damping system. Also, according to the energy dissipation graph, the total energy loss is greater in non-linear damping system than other systems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=passive%20control%20system" title="passive control system">passive control system</a>, <a href="https://publications.waset.org/abstracts/search?q=damping%20devices" title=" damping devices"> damping devices</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dampers" title=" viscous dampers"> viscous dampers</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20algorithm" title=" control algorithm"> control algorithm</a> </p> <a href="https://publications.waset.org/abstracts/10226/optimum-parameter-of-a-viscous-damper-for-seismic-and-wind-vibration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10226.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">470</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25707</span> A Wireless Feedback Control System as a Base of Bio-Inspired Structure System to Mitigate Vibration in Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gwanghee%20Heo">Gwanghee Heo</a>, <a href="https://publications.waset.org/abstracts/search?q=Geonhyeok%20Bang"> Geonhyeok Bang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chunggil%20Kim"> Chunggil Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Chinok%20Lee"> Chinok Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper attempts to develop a wireless feedback control system as a primary step eventually toward a bio-inspired structure system where inanimate structure behaves like a life form autonomously. It is a standalone wireless control system which is supposed to measure externally caused structural responses, analyze structural state from acquired data, and take its own action on the basis of the analysis with an embedded logic. For an experimental examination of its effectiveness, we applied it on a model of two-span bridge and performed a wireless control test. Experimental tests have been conducted for comparison on both the wireless and the wired system under the conditions of Un-control, Passive-off, Passive-on, and Lyapunov control algorithm. By proving the congruence of the test result of the wireless feedback control system with the wired control system, its control performance was proven to be effective. Besides, it was found to be economical in energy consumption and also autonomous by means of a command algorithm embedded into it, which proves its basic capacity as a bio-inspired system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=structural%20vibration%20control" title="structural vibration control">structural vibration control</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20system" title=" wireless system"> wireless system</a>, <a href="https://publications.waset.org/abstracts/search?q=MR%20damper" title=" MR damper"> MR damper</a>, <a href="https://publications.waset.org/abstracts/search?q=feedback%20control" title=" feedback control"> feedback control</a>, <a href="https://publications.waset.org/abstracts/search?q=embedded%20system" title=" embedded system"> embedded system</a> </p> <a href="https://publications.waset.org/abstracts/93059/a-wireless-feedback-control-system-as-a-base-of-bio-inspired-structure-system-to-mitigate-vibration-in-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93059.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">211</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25706</span> Vibration Control of Two Adjacent Structures Using a Non-Linear Damping System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soltani%20Amir">Soltani Amir</a>, <a href="https://publications.waset.org/abstracts/search?q=Wang%20Xuan"> Wang Xuan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The advantage of using non-linear passive damping system in vibration control of two adjacent structures is investigated under their base excitation. The base excitation is El Centro earthquake record acceleration. The damping system is considered as an optimum and effective non-linear viscous damper that is connected between two adjacent structures. A Matlab program is developed to produce the stiffness and damping matrices and to determine a time history analysis of the dynamic motion of the system. One structure is assumed to be flexible while the other has a rule as laterally supporting structure with rigid frames. The response of the structure has been calculated and the non-linear damping coefficient is determined using optimum LQR algorithm in an optimum vibration control system. The non-linear parameter of damping system is estimated and it has shown a significant advantage of application of this system device for vibration control of two adjacent tall building. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20control" title="active control">active control</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20control" title=" passive control"> passive control</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dampers" title=" viscous dampers"> viscous dampers</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20control" title=" structural control"> structural control</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration%20control" title=" vibration control"> vibration control</a>, <a href="https://publications.waset.org/abstracts/search?q=tall%20building" title=" tall building"> tall building</a> </p> <a href="https://publications.waset.org/abstracts/5867/vibration-control-of-two-adjacent-structures-using-a-non-linear-damping-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5867.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">514</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25705</span> A Passive Reaction Force Compensation for a Linear Motor Motion Stage Using Pre-Compressed Springs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kim%20Duc%20Hoang">Kim Duc Hoang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyeong%20Joon%20Ahn"> Hyeong Joon Ahn</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Residual vibration of the system base due to a high-acceleration motion of a stage may reduce life and productivity of the manufacturing device. Although a passive RFC can reduce vibration of the system base, spring or dummy mass should be replaced to tune performance of the RFC. In this paper, we develop a novel concept of the passive RFC mechanism for a linear motor motion stage using pre-compressed springs. Dynamic characteristic of the passive RFC can be adjusted by pre-compression of the spring without exchanging the spring or dummy mass. First, we build a linear motor motion stage with pre-compressed springs. Then, the effect of the pre-compressed spring on the passive RFC is investigated by changing both pre-compressions and stiffness of springs. Finally, the effectiveness of the passive RFC using pre-compressed springs was verified with both simulations and experiments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=linear%20motor%20motion%20stage" title="linear motor motion stage">linear motor motion stage</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20vibration" title=" residual vibration"> residual vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20RFC" title=" passive RFC"> passive RFC</a>, <a href="https://publications.waset.org/abstracts/search?q=pre-compressed%20spring" title=" pre-compressed spring"> pre-compressed spring</a> </p> <a href="https://publications.waset.org/abstracts/63341/a-passive-reaction-force-compensation-for-a-linear-motor-motion-stage-using-pre-compressed-springs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63341.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">354</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25704</span> Piezoelectric based Passive Vibration Control of Composite Turbine Blade using Shunt Circuit</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kouider%20Bendine">Kouider Bendine</a>, <a href="https://publications.waset.org/abstracts/search?q=Zouaoui%20Satla"> Zouaoui Satla</a>, <a href="https://publications.waset.org/abstracts/search?q=Boukhoulda%20Farouk%20Benallel"> Boukhoulda Farouk Benallel</a>, <a href="https://publications.waset.org/abstracts/search?q=Shun-Qi%20Zhang"> Shun-Qi Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Turbine blades are subjected to a variety of loads, lead to an undesirable vibration. Such vibration can cause serious damages or even lead to a total failure of the blade. The present paper addresses the vibration control of turbine blade. The study aims to propose a passive vibration control using piezoelectric material. the passive control is effectuated by shunting an RL circuit to the piezoelectric patch in a parallel configuration. To this end, a Finite element model for the blade with the piezoelectric patch is implemented in ANSYS APDL. The model is then subjected to a harmonic frequency-based analysis for the case of control on and off. The results show that the proposed methodology was able to reduce blade vibration by 18%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=blade" title="blade">blade</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20piezoelectric%20vibration%20control" title=" active piezoelectric vibration control"> active piezoelectric vibration control</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element." title=" finite element."> finite element.</a>, <a href="https://publications.waset.org/abstracts/search?q=shunt%20circuit" title=" shunt circuit"> shunt circuit</a> </p> <a href="https://publications.waset.org/abstracts/165603/piezoelectric-based-passive-vibration-control-of-composite-turbine-blade-using-shunt-circuit" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165603.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">102</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25703</span> Seismic Response Control of 20-Storey Benchmark Building Using True Negative Stiffness Device</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asim%20Qureshi">Asim Qureshi</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20S.%20Jangid"> R. S. Jangid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Seismic response control of structures is generally achieved by using control devices which either dissipate the input energy or modify the dynamic properties of structure.In this paper, the response of a 20-storey benchmark building supplemented by viscous dampers and Negative Stiffness Device (NSD) is assessed by numerical simulations using the Newmark-beta method. True negative stiffness is an adaptive passive device which assists the motion unlike positive stiffness. The structure used in this study is subjected to four standard ground motions varying from moderate to severe, near fault to far-field earthquakes. The objective of the present study is to show the effectiveness of the adaptive negative stiffness device (NSD and passive dampers together) relative to passive dampers alone. This is done by comparing the responses of the above uncontrolled structure (i.e., without any device) with the structure having passive dampers only and also with the structure supplemented with adaptive negative stiffness device. Various performance indices, top floor displacement, top floor acceleration and inter-storey drifts are used as comparison parameters. It is found that NSD together with passive dampers is quite effective in reducing the response of aforementioned structure relative to structure without any device or passive dampers only. Base shear and acceleration is reduced significantly by incorporating NSD at the cost of increased inter-storey drifts which can be compensated using the passive dampers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20negative%20stiffness%20device" title="adaptive negative stiffness device">adaptive negative stiffness device</a>, <a href="https://publications.waset.org/abstracts/search?q=apparent%20yielding" title=" apparent yielding"> apparent yielding</a>, <a href="https://publications.waset.org/abstracts/search?q=NSD" title=" NSD"> NSD</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20dampers" title=" passive dampers"> passive dampers</a> </p> <a href="https://publications.waset.org/abstracts/27228/seismic-response-control-of-20-storey-benchmark-building-using-true-negative-stiffness-device" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27228.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">431</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25702</span> The Prospective Assessment of Zero-Energy Dwellings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jovana%20Dj.%20Jovanovic">Jovana Dj. Jovanovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Svetlana%20M.%20Stevovic"> Svetlana M. Stevovic</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The highest priority of so called, projected <em>passive houses</em> is to meet the appropriate energy demand. Every single material and layer which is injected into a dwelling has a certain energy quantity stored. The <em>passive houses</em> include optimized insulation levels with minimal thermal bridges, minimum of air leakage through the building, utilization of passive solar and internal gains, and good circulation of air which leans on mechanical ventilation system. The focus of this paper is on passive <em>house </em>features, benefits and targets, their feasibility and energy demands which are set up during each project. Numerous <em>passive house-standards</em> outline the very significant role of zero-energy dwellings towards the modern label of sustainable development. It is clear that the performance of both built and existing housing stock must be addressed if the population across the world sets out the energy objectives. This scientific article examines passive house features since the many passive house cases are launched. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benefits" title="benefits">benefits</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20demands" title=" energy demands"> energy demands</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20houses" title=" passive houses"> passive houses</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20development" title=" sustainable development"> sustainable development</a> </p> <a href="https://publications.waset.org/abstracts/42382/the-prospective-assessment-of-zero-energy-dwellings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42382.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">337</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25701</span> Dry Friction Occurring in the Suspensions for Passive and Switchable Damper Systems and Its Effect on Ride Comfort</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aref%20M.%20A.%20Soliman">Aref M. A. Soliman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20A.%20Hassan"> Mahmoud A. Hassan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In all vehicle suspension, there is a dry friction. One of the various active suspensions, which have been shown to have considerable practical potential, is a switchable damper suspension system. In this paper, vehicle ride comfort for the passive and switchable damper suspension systems as affected by the value of frictional force generated in springs is discussed. A mathematical model of a quarter vehicle model for two setting switchable damper suspension system with dry friction force is developed to evaluate vehicle ride comfort in terms of suspension performance criteria. The vehicle itself is treated as a rigid body undergoing vertical motions. Comparisons between passive and switchable damper suspensions systems with dry friction force in terms of ride performance are also discussed. The results showed that the ride comfort for the passive and switchable damper suspension systems was deteriorated due to dry friction occurring in the suspensions. The two setting switchable damper with and without dry friction force gives better ride improvements compared with the passive suspension system. Also, the obtained results show an optimum value of damping ratio of the passive suspension system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ride%20comfort" title="ride comfort">ride comfort</a>, <a href="https://publications.waset.org/abstracts/search?q=dry%20friction" title=" dry friction"> dry friction</a>, <a href="https://publications.waset.org/abstracts/search?q=switchable%20damper" title=" switchable damper"> switchable damper</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20suspension" title=" passive suspension"> passive suspension</a> </p> <a href="https://publications.waset.org/abstracts/82923/dry-friction-occurring-in-the-suspensions-for-passive-and-switchable-damper-systems-and-its-effect-on-ride-comfort" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82923.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">372</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25700</span> Using Adaptive Pole Placement Control Strategy for Active Steering Safety System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hadi%20Adibi-Asl">Hadi Adibi-Asl</a>, <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Doosthosseini"> Alireza Doosthosseini</a>, <a href="https://publications.waset.org/abstracts/search?q=Amir%20Taghavipour"> Amir Taghavipour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper studies the design of an adaptive control strategy to tune an active steering system for better drivability and maneuverability. In the first step, adaptive control strategy is applied to estimate the uncertain parameters on-line (e.g. cornering stiffness), then the estimated parameters are fed into the pole placement controller to generate corrective feedback gain to improve the steering system dynamic’s characteristics. The simulations are evaluated for three types of road conditions (dry, wet, and icy), and the performance of the adaptive pole placement control (APPC) are compared with pole placement control (PPC) and a passive system. The results show that the APPC strategy significantly improves the yaw rate and side slip angle of a bicycle plant model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20control" title="adaptive control">adaptive control</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20steering" title=" active steering"> active steering</a>, <a href="https://publications.waset.org/abstracts/search?q=pole%20placement" title=" pole placement"> pole placement</a>, <a href="https://publications.waset.org/abstracts/search?q=vehicle%20dynamics" title=" vehicle dynamics"> vehicle dynamics</a> </p> <a href="https://publications.waset.org/abstracts/59941/using-adaptive-pole-placement-control-strategy-for-active-steering-safety-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59941.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">467</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25699</span> Passive Non-Prehensile Manipulation on Helix Path Based on Mechanical Intelligence</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdullah%20Bajelan">Abdullah Bajelan</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Akbarimajd"> Adel Akbarimajd</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Object manipulation techniques in robotics can be categorized in two major groups including manipulation with grasp and manipulation without grasp. The original aim of this paper is to develop an object manipulation method where in addition to being grasp-less, the manipulation task is done in a passive approach. In this method, linear and angular positions of the object are changed and its manipulation path is controlled. The manipulation path is a helix track with constant radius and incline. The method presented in this paper proposes a system which has not the actuator and the active controller. So this system requires a passive mechanical intelligence to convey the object from the status of the source along the specified path to the goal state. This intelligent is created based on utilizing the geometry of the system components. A general set up for the components of the system is considered to satisfy the required conditions. Then after kinematical analysis, detailed dimensions and geometry of the mechanism is obtained. The kinematical results are verified by simulation in ADAMS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mechanical%20intelligence" title="mechanical intelligence">mechanical intelligence</a>, <a href="https://publications.waset.org/abstracts/search?q=object%20manipulation" title=" object manipulation"> object manipulation</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20mechanism" title=" passive mechanism"> passive mechanism</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20non-prehensile%20manipulation" title=" passive non-prehensile manipulation"> passive non-prehensile manipulation</a> </p> <a href="https://publications.waset.org/abstracts/11209/passive-non-prehensile-manipulation-on-helix-path-based-on-mechanical-intelligence" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11209.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">482</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25698</span> Passive Solar Techniques to Improve Thermal Comfort and Reduce Energy Consumption of Domestic Use</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naci%20Kalkan">Naci Kalkan</a>, <a href="https://publications.waset.org/abstracts/search?q=Ihsan%20Dagtekin"> Ihsan Dagtekin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Passive design responds to improve indoor thermal comfort and minimize the energy consumption. The present research analyzed the how efficiently passive solar technologies generate heating and cooling and provide the system integration for domestic applications. In addition to this, the aim of this study is to increase the efficiency of solar systems system with integration some innovation and optimization. As a result, outputs of the project might start a new sector to provide environmentally friendly and cheap cooling for domestic use. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=passive%20solar%20systems" title="passive solar systems">passive solar systems</a>, <a href="https://publications.waset.org/abstracts/search?q=heating" title=" heating"> heating</a>, <a href="https://publications.waset.org/abstracts/search?q=cooling" title=" cooling"> cooling</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20comfort" title=" thermal comfort"> thermal comfort</a>, <a href="https://publications.waset.org/abstracts/search?q=ventilation%20systems" title=" ventilation systems"> ventilation systems</a> </p> <a href="https://publications.waset.org/abstracts/49506/passive-solar-techniques-to-improve-thermal-comfort-and-reduce-energy-consumption-of-domestic-use" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49506.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">299</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25697</span> Controlling Interactions and Non-Equilibrium Steady State in Spinning Active Matter Monolayers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joshua%20Paul%20Steimel">Joshua Paul Steimel</a>, <a href="https://publications.waset.org/abstracts/search?q=Michael%20Pappas"> Michael Pappas</a>, <a href="https://publications.waset.org/abstracts/search?q=Ethan%20Hall"> Ethan Hall</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Particle-particle interactions are critical in determining the state of an active matter system. Unique and ubiquitous non-equilibrium behavior like swarming, vortexing, spiraling, and much more is governed by interactions between active units or particles. In hybrid active-passive matter systems, the attraction between spinning active units in a 2D monolayer of passive particles is controlled by the mechanical behavior of the passive monolayer. We demonstrate here that the range and dynamics of this attraction can be controlled by changing the composition of the passive monolayer by adding dopant passive particles. These dopant passive particles effectively pin the movement of dislocation motion in the passive media and reduce the probability of defect motion required to erode the bridge of passive particles between active spinners, thus reducing the range of attraction. Additionally, by adding an out of plane component to the magnetic moment and creating a top-like motion a short range repulsion emerges between the top-like particle. At inter-top distances less than four particle diameters apart, the tops repel but beyond that, distance attract up to 13 particle diameters apart. The tops were also able to locally and transiently anneal the passive monolayer. Thus we demonstrate that by tuning several parameters of the hybrid active matter system, one can observe very different emergent behavior. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20matter" title="active matter">active matter</a>, <a href="https://publications.waset.org/abstracts/search?q=colloids" title=" colloids"> colloids</a>, <a href="https://publications.waset.org/abstracts/search?q=ferromagnetic" title=" ferromagnetic"> ferromagnetic</a>, <a href="https://publications.waset.org/abstracts/search?q=annealing" title=" annealing"> annealing</a> </p> <a href="https://publications.waset.org/abstracts/155350/controlling-interactions-and-non-equilibrium-steady-state-in-spinning-active-matter-monolayers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155350.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">110</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25696</span> Evaluation of Hybrid Viscoelastic Damper for Passive Energy Dissipation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20S.%20Ghodsi">S. S. Ghodsi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20H.%20Mehrabi"> M. H. Mehrabi</a>, <a href="https://publications.waset.org/abstracts/search?q=Zainah%20Ibrahim"> Zainah Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Meldi%20Suhatril"> Meldi Suhatril</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research examines the performance of a hybrid passive control device for enhancing the seismic response of steel frame structures. The device design comprises a damper which employs a viscoelastic material to control both shear and axial strain. In the design, energy is dissipated through the shear strain of a two-layer system of viscoelastic pads which are located between steel plates. In addition, viscoelastic blocks have been included on either side of the main shear damper which obtains compressive strains in the viscoelastic blocks. These dampers not only dissipate energy but also increase the stiffness of the steel frame structure, and the degree to which they increase the stiffness may be controlled by the size and shape. In this research, the cyclical behavior of the damper was examined both experimentally and numerically with finite element modeling. Cyclic loading results of the finite element modeling reveal fundamental characteristics of this hybrid viscoelastic damper. The results indicate that incorporating a damper of the design can significantly improve the seismic performance of steel frame structures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cyclic%20loading" title="cyclic loading">cyclic loading</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title=" energy dissipation"> energy dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20damper" title=" hybrid damper"> hybrid damper</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20control%20system" title=" passive control system"> passive control system</a>, <a href="https://publications.waset.org/abstracts/search?q=viscoelastic%20damper" title=" viscoelastic damper"> viscoelastic damper</a> </p> <a href="https://publications.waset.org/abstracts/78097/evaluation-of-hybrid-viscoelastic-damper-for-passive-energy-dissipation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78097.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">208</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25695</span> A Numerical Study on Semi-Active Control of a Bridge Deck under Seismic Excitation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Yanik">A. Yanik</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Aldemir"> U. Aldemir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the benefits of implementing the semi-active devices in relation to passive viscous damping in the context of seismically isolated bridge structures. Since the intrinsically nonlinear nature of semi-active devices prevents the direct evaluation of Laplace transforms, frequency response functions are compiled from the computed time history response to sinusoidal and pulse-like seismic excitation. A simple semi-active control policy is used in regard to passive linear viscous damping and an optimal non-causal semi-active control strategy. The control strategy requires optimization. Euler-Lagrange equations are solved numerically during this procedure. The optimal closed-loop performance is evaluated for an idealized controllable dash-pot. A simplified single-degree-of-freedom model of an isolated bridge is used as numerical example. Two bridge cases are investigated. These cases are; bridge deck without the isolation bearing and bridge deck with the isolation bearing. To compare the performances of the passive and semi-active control cases, frequency dependent acceleration, velocity and displacement response transmissibility ratios <em>T<sub>a</sub></em>(<em>w</em>), <em>T<sub>v</sub></em>(<em>w</em>), and <em>T<sub>d</sub></em>(<em>w</em>) are defined. To fully investigate the behavior of the structure subjected to the sinusoidal and pulse type excitations, different damping levels are considered. Numerical results showed that, under the effect of external excitation, bridge deck with semi-active control showed better structural performance than the passive bridge deck case. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bridge%20structures" title="bridge structures">bridge structures</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20control" title=" passive control"> passive control</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic" title=" seismic"> seismic</a>, <a href="https://publications.waset.org/abstracts/search?q=semi-active%20control" title=" semi-active control"> semi-active control</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20damping" title=" viscous damping"> viscous damping</a> </p> <a href="https://publications.waset.org/abstracts/96050/a-numerical-study-on-semi-active-control-of-a-bridge-deck-under-seismic-excitation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96050.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">242</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25694</span> Sliding Mode Controller for Active Suspension System on a Passenger Car Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nouby%20M.%20Ghazaly">Nouby M. Ghazaly</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20O.%20Moaaz"> Ahmed O. Moaaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Makrahy"> Mostafa Makrahy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main purpose of a car suspension system is to reduce the vibrations resulting from road roughness. The main objective of this research paper is to decrease vibration and improve passenger comfort through controlling car suspension system using sliding mode control techniques. The mathematical model for passive and active suspensions systems for quarter car model which subject to excitation from different road profiles is obtained. The active suspension system is synthesized based on sliding mode control for a quarter car model. The performance of the sliding mode control is determined through computer simulations using MATLAB and SIMULINK toolbox. The simulated results plotted in time domain, and root mean square values. It is found that active suspension system using sliding mode control improves the ride comfort and decrease vibration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=quarter%20car%20model" title="quarter car model">quarter car model</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20suspension%20system" title=" active suspension system"> active suspension system</a>, <a href="https://publications.waset.org/abstracts/search?q=sliding%20mode%20control" title=" sliding mode control"> sliding mode control</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20profile" title=" road profile"> road profile</a> </p> <a href="https://publications.waset.org/abstracts/78568/sliding-mode-controller-for-active-suspension-system-on-a-passenger-car-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78568.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">309</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25693</span> Coding Structures for Seated Row Simulation of an Active Controlled Vibration Isolation and Stabilization System for Astronaut’s Exercise Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ziraguen%20O.%20Williams">Ziraguen O. Williams</a>, <a href="https://publications.waset.org/abstracts/search?q=Shield%20B.%20Lin"> Shield B. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Fouad%20N.%20Matari"> Fouad N. Matari</a>, <a href="https://publications.waset.org/abstracts/search?q=Leslie%20J.%20Quiocho"> Leslie J. Quiocho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Simulation for seated row exercise was a continued task to assist NASA in analyzing a one-dimensional vibration isolation and stabilization system for astronaut’s exercise platform. Feedback delay and signal noise were added to the model as previously done in simulation for squat exercise. Simulation runs for this study were conducted in two software simulation tools, Trick and MBDyn, software simulation environments developed at the NASA Johnson Space Center. The exciter force in the simulation was calculated from the motion capture of an exerciser during a seated row exercise. The simulation runs include passive control, active control using a Proportional, Integral, Derivative (PID) controller, and active control using a Piecewise Linear Integral Derivative (PWLID) controller. Output parameters include displacements of the exercise platform, the exerciser, and the counterweight; transmitted force to the wall of spacecraft; and actuator force to the platform. The simulation results showed excellent force reduction in the actively controlled system compared to the passive controlled system, which showed less force reduction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=control" title="control">control</a>, <a href="https://publications.waset.org/abstracts/search?q=counterweight" title=" counterweight"> counterweight</a>, <a href="https://publications.waset.org/abstracts/search?q=isolation" title=" isolation"> isolation</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration." title=" vibration."> vibration.</a> </p> <a href="https://publications.waset.org/abstracts/154195/coding-structures-for-seated-row-simulation-of-an-active-controlled-vibration-isolation-and-stabilization-system-for-astronauts-exercise-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154195.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">140</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25692</span> Comparison of the Dynamic Characteristics of Active and Passive Hybrid Bearings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Denis%20V.%20Shutin">Denis V. Shutin</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexander%20Yu.%20Babin"> Alexander Yu. Babin</a>, <a href="https://publications.waset.org/abstracts/search?q=Leonid%20A.%20Savin"> Leonid A. Savin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the ways of reducing vibroactivity of rotor systems is to apply active hybrid bearings. Their design allows correction of the rotor’s location by means of separately controlling the supply pressure of the lubricant into the friction area. In a most simple case, the control system is based on a P-regulator. Increase of the gain coefficient allows decreasing the amplitude of rotor’s vibrations. The same effect can be achieved by means of increasing the pressure in the collector of a traditional passive hybrid bearing. However, these approaches affect the dynamic characteristics of the bearing differently. Theoretical studies show that the increase of the gain coefficient of an active bearing increases the stiffness of the bearing, as well as the increase of the pressure in the collector. Nevertheless, in case of a passive bearing, the damping properties deteriorate, whereas the active hybrid bearings obtain higher damping properties, which allow effectively providing the energy dissipation of the rotor vibrations and reducing the load on the constructional elements of a machine. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20bearings" title="active bearings">active bearings</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20system" title=" control system"> control system</a>, <a href="https://publications.waset.org/abstracts/search?q=damping" title=" damping"> damping</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20bearings" title=" hybrid bearings"> hybrid bearings</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffness" title=" stiffness"> stiffness</a> </p> <a href="https://publications.waset.org/abstracts/47442/comparison-of-the-dynamic-characteristics-of-active-and-passive-hybrid-bearings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47442.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">383</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25691</span> Design of Bidirectional Wavelength Division Multiplexing Passive Optical Network in Optisystem Environment </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ashiq%20Hussain">Ashiq Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahwash%20Hussain"> Mahwash Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Zeenat%20Parveen"> Zeenat Parveen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Now a days the demand for broadband service has increased. Due to which the researchers are trying to find a solution to provide a large amount of service. There is a shortage of bandwidth because of the use of downloading video, voice and data. One of the solutions to overcome this shortage of bandwidth is to provide the communication system with passive optical components. We have increased the data rate in this system. From experimental results we have concluded that the quality factor has increased by adding passive optical networks. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=WDM-PON" title="WDM-PON">WDM-PON</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20fiber" title=" optical fiber"> optical fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=BER" title=" BER"> BER</a>, <a href="https://publications.waset.org/abstracts/search?q=Q-factor" title=" Q-factor"> Q-factor</a>, <a href="https://publications.waset.org/abstracts/search?q=eye%20diagram" title=" eye diagram"> eye diagram</a> </p> <a href="https://publications.waset.org/abstracts/17412/design-of-bidirectional-wavelength-division-multiplexing-passive-optical-network-in-optisystem-environment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17412.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">509</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25690</span> Simulation of a Control System for an Adaptive Suspension System for Passenger Vehicles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Gokul%20Prassad">S. Gokul Prassad</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Aakash"> S. Aakash</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Malar%20Mohan"> K. Malar Mohan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the process to cope with the challenges faced by the automobile industry in providing ride comfort, the electronics and control systems play a vital role. The control systems in an automobile monitor various parameters, controls the performances of the systems, thereby providing better handling characteristics. The automobile suspension system is one of the main systems that ensure the safety, stability and comfort of the passengers. The system is solely responsible for the isolation of the entire automobile from harmful road vibrations. Thus, integration of the control systems in the automobile suspension system would enhance its performance. The diverse road conditions of India demand the need of an efficient suspension system which can provide optimum ride comfort in all road conditions. For any passenger vehicle, the design of the suspension system plays a very important role in assuring the ride comfort and handling characteristics. In recent years, the air suspension system is preferred over the conventional suspension systems to ensure ride comfort. In this article, the ride comfort of the adaptive suspension system is compared with that of the passive suspension system. The schema is created in MATLAB/Simulink environment. The system is controlled by a proportional integral differential controller. Tuning of the controller was done with the Particle Swarm Optimization (PSO) algorithm, since it suited the problem best. Ziegler-Nichols and Modified Ziegler-Nichols tuning methods were also tried and compared. Both the static responses and dynamic responses of the systems were calculated. Various random road profiles as per ISO 8608 standard are modelled in the MATLAB environment and their responses plotted. Open-loop and closed loop responses of the random roads, various bumps and pot holes are also plotted. The simulation results of the proposed design are compared with the available passive suspension system. The obtained results show that the proposed adaptive suspension system is efficient in controlling the maximum over shoot and the settling time of the system is reduced enormously. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=automobile%20suspension" title="automobile suspension">automobile suspension</a>, <a href="https://publications.waset.org/abstracts/search?q=MATLAB" title=" MATLAB"> MATLAB</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20system" title=" control system"> control system</a>, <a href="https://publications.waset.org/abstracts/search?q=PID" title=" PID"> PID</a>, <a href="https://publications.waset.org/abstracts/search?q=PSO" title=" PSO"> PSO</a> </p> <a href="https://publications.waset.org/abstracts/62788/simulation-of-a-control-system-for-an-adaptive-suspension-system-for-passenger-vehicles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62788.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">294</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25689</span> Robust State feedback Controller for an Active Suspension System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hussein%20Altartouri">Hussein Altartouri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this paper is to present a modeling and control of the active suspension system using robust state feedback controller implemented for a half car model. This system represents a mechatronic system which contains all the essential components to be considered a complete mechatronic system. This system must adapt different conditions which are difficult to compromise, such as disturbances, slippage, and motion on rough road (that contains rocks, stones, and other miscellanies). Some current automobile suspension systems use passive components only by utilizing spring and damping coefficient with fixed rates. Vehicle suspensions systems are used to provide good road handling and improve passenger comfort. Passive suspensions only offer compromise between these two conflicting criteria. Active suspension poses the ability to reduce the traditional design as a compromise between handling and comfort by directly controlling the suspensions force actuators. In this study, the robust state feedback controller implemented to the active suspensions system for half car model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=half-car%20model" title="half-car model">half-car model</a>, <a href="https://publications.waset.org/abstracts/search?q=active%20suspension%20system" title=" active suspension system"> active suspension system</a>, <a href="https://publications.waset.org/abstracts/search?q=state%20feedback" title=" state feedback"> state feedback</a>, <a href="https://publications.waset.org/abstracts/search?q=road%20profile" title=" road profile"> road profile</a> </p> <a href="https://publications.waset.org/abstracts/11201/robust-state-feedback-controller-for-an-active-suspension-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11201.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">393</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25688</span> A Study on the Effectiveness of Alternative Commercial Ventilation Inlets That Improve Energy Efficiency of Building Ventilation Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Brian%20Considine">Brian Considine</a>, <a href="https://publications.waset.org/abstracts/search?q=Aonghus%20McNabola"> Aonghus McNabola</a>, <a href="https://publications.waset.org/abstracts/search?q=John%20Gallagher"> John Gallagher</a>, <a href="https://publications.waset.org/abstracts/search?q=Prashant%20Kumar"> Prashant Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Passive air pollution control devices known as aspiration efficiency reducers (AER) have been developed using aspiration efficiency (AE) concepts. Their purpose is to reduce the concentration of particulate matter (PM) drawn into a building air handling unit (AHU) through alterations in the inlet design improving energy consumption. In this paper an examination is conducted into the effect of installing a deflector system around an AER-AHU inlet for both a forward and rear-facing orientations relative to the wind. The results of the study found that these deflectors are an effective passive control method for reducing AE at various ambient wind speeds over a range of microparticles of varying diameter. The deflector system was found to induce a large wake zone at low ambient wind speeds for a rear-facing AER-AHU, resulting in significantly lower AE in comparison to without. As the wind speed increased, both contained a wake zone but have much lower concentration gradients with the deflectors. For the forward-facing models, the deflector system at low ambient wind speed was preferred at higher Stokes numbers but there was negligible difference as the Stokes number decreased. Similarly, there was no significant difference at higher wind speeds across the Stokes number range tested. The results demonstrate that a deflector system is a viable passive control method for the reduction of ventilation energy consumption. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20handling%20unit" title="air handling unit">air handling unit</a>, <a href="https://publications.waset.org/abstracts/search?q=air%20pollution" title=" air pollution"> air pollution</a>, <a href="https://publications.waset.org/abstracts/search?q=aspiration%20efficiency" title=" aspiration efficiency"> aspiration efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20efficiency" title=" energy efficiency"> energy efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=particulate%20matter" title=" particulate matter"> particulate matter</a>, <a href="https://publications.waset.org/abstracts/search?q=ventilation" title=" ventilation"> ventilation</a> </p> <a href="https://publications.waset.org/abstracts/123659/a-study-on-the-effectiveness-of-alternative-commercial-ventilation-inlets-that-improve-energy-efficiency-of-building-ventilation-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123659.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">118</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25687</span> Experimental Study of Complete Loss of Coolant Flow (CLOF) Test by System–Integrated Modular Advanced Reactor Integral Test Loop (SMART-ITL) with Passive Residual Heat Removal System (PRHRS)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jin%20Hwa%20Yang">Jin Hwa Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hwang%20Bae"> Hwang Bae</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20Uk%20Ryu"> Sung Uk Ryu</a>, <a href="https://publications.waset.org/abstracts/search?q=Byong%20Guk%20Jeon"> Byong Guk Jeon</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20Jae%20Yi"> Sung Jae Yi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyun%20Sik%20Park"> Hyun Sik Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Experimental studies using a large-scale thermal-hydraulic integral test facility, System–integrated Modular Advanced Reactor Integral Test Loop (SMART-ITL), have been carried out to validate the performance of the prototype, SMART. After Fukushima accident, the passive safety systems have been dealt as important designs for retaining of nuclear safety. One of the concerned scenarios for evaluating the passive safety system is a Complete Loss of Coolant Flow (CLOF). The flowrate of coolant in the primary system is maintained by Reactor Coolant Pump (RCP). When the supply of electric power of RCP is shut off, the flowrate of coolant decreases sharply, and the temperature of the coolant increases rapidly. Therefore, the reactor trip signal is activated to prevent the over-heating of the core. In this situation, Passive Residual Heat Removal System (PRHRS) plays a significant role to assure the soundness of the SMART. The PRHRS using a two-phase natural circulation is a passive safety system in the SMART to eliminate the heat of steam generator in the secondary system with heat exchanger submarined in the Emergency Cooling Tank (ECT). As the RCPs continue to coast down, inherent natural circulation in the primary system transfers heat to the secondary system. The transferred heat is removed by PRHRS in the secondary system. In this paper, the progress of the CLOF accident is described with experimental data of transient condition performed by SMART-ITL. Finally, the capability of passive safety system and inherent natural circulation will be evaluated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CLOF" title="CLOF">CLOF</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20circulation" title=" natural circulation"> natural circulation</a>, <a href="https://publications.waset.org/abstracts/search?q=PRHRS" title=" PRHRS"> PRHRS</a>, <a href="https://publications.waset.org/abstracts/search?q=SMART-ITL" title=" SMART-ITL"> SMART-ITL</a> </p> <a href="https://publications.waset.org/abstracts/62497/experimental-study-of-complete-loss-of-coolant-flow-clof-test-by-system-integrated-modular-advanced-reactor-integral-test-loop-smart-itl-with-passive-residual-heat-removal-system-prhrs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62497.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">437</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25686</span> Comparison between the Performances of Different Boring Bars in the Internal Turning of Long Overhangs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wallyson%20Thomas">Wallyson Thomas</a>, <a href="https://publications.waset.org/abstracts/search?q=Zsombor%20Fulop"> Zsombor Fulop</a>, <a href="https://publications.waset.org/abstracts/search?q=Attila%20%20Szilagyi"> Attila Szilagyi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Impact dampers are mainly used in the metal-mechanical industry in operations that generate too much vibration in the machining system. Internal turning processes become unstable during the machining of deep holes, in which the tool holder is used with long overhangs (high length-to-diameter ratios). The devices coupled with active dampers, are expensive and require the use of advanced electronics. On the other hand, passive impact dampers (PID – Particle Impact Dampers) are cheaper alternatives that are easier to adapt to the machine’s fixation system, once that, in this last case, a cavity filled with particles is simply added to the structure of the tool holder. The cavity dimensions and the diameter of the spheres are pre-determined. Thus, when passive dampers are employed during the machining process, the vibration is transferred from the tip of the tool to the structure of the boring bar, where it is absorbed by the fixation system. This work proposes to compare the behaviors of a conventional solid boring bar and a boring bar with a passive impact damper in turning while using the highest possible L/D (length-to-diameter ratio) of the tool and an Easy Fix fixation system (also called: Split Bushing Holding System). It is also intended to optimize the impact absorption parameters, as the filling percentage of the cavity and the diameter of the spheres. The test specimens were made of hardened material and machined in a Computer Numerical Control (CNC) lathe. The laboratory tests showed that when the cavity of the boring bar is totally filled with minimally spaced spheres of the largest diameter, the gain in absorption allowed of obtaining, with an L/D equal to 6, the same surface roughness obtained when using the solid boring bar with an L/D equal to 3.4. The use of the passive particle impact damper resulted in, therefore, increased static stiffness and reduced deflexion of the tool. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20damper" title="active damper">active damper</a>, <a href="https://publications.waset.org/abstracts/search?q=fixation%20system" title=" fixation system"> fixation system</a>, <a href="https://publications.waset.org/abstracts/search?q=hardened%20material" title=" hardened material"> hardened material</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20damper" title=" passive damper "> passive damper </a> </p> <a href="https://publications.waset.org/abstracts/124361/comparison-between-the-performances-of-different-boring-bars-in-the-internal-turning-of-long-overhangs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124361.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">220</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25685</span> CFD Analysis of Passive Cooling Building by Using Solar Chimney for Mild or Warm Climates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naci%20Kalkan">Naci Kalkan</a>, <a href="https://publications.waset.org/abstracts/search?q=Ihsan%20Dagtekin"> Ihsan Dagtekin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research presents the design and analysis of solar air-conditioning systems particularly solar chimney which is a passive strategy for natural ventilation, and demonstrates the structures of these systems’ using Computational Fluid Dynamic (CFD) and finally compares the results with several examples, which have been studied experimentally and carried out previously. In order to improve the performance of solar chimney system, highly efficient sub-system components are considered for the design. The general purpose of the research is to understand how efficiently solar chimney systems generate cooling, and is to improve the efficient of such systems for integration with existing and future domestic buildings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20and%20passive%20solar%20technologies" title="active and passive solar technologies">active and passive solar technologies</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20cooling%20system" title=" solar cooling system"> solar cooling system</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20chimney" title=" solar chimney"> solar chimney</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20ventilation" title=" natural ventilation"> natural ventilation</a>, <a href="https://publications.waset.org/abstracts/search?q=cavity%20depth" title=" cavity depth"> cavity depth</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD%20models%20for%20solar%20chimney" title=" CFD models for solar chimney"> CFD models for solar chimney</a> </p> <a href="https://publications.waset.org/abstracts/33632/cfd-analysis-of-passive-cooling-building-by-using-solar-chimney-for-mild-or-warm-climates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33632.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">574</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25684</span> The Effect of Vertical Shear-link in Improving the Seismic Performance of Structures with Eccentrically Bracing Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Reza%20Baradaran">Mohammad Reza Baradaran</a>, <a href="https://publications.waset.org/abstracts/search?q=Farhad%20Hamzezarghani"> Farhad Hamzezarghani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Rastegari%20Ghiri"> Mehdi Rastegari Ghiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Zahra%20Mirsanjari"> Zahra Mirsanjari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Passive control methods can be utilized to build earthquake resistant structures, and also to strengthen the vulnerable ones. One of the most effective, yet simple passive control methods is the use of vertical shear-links (VSL) in systems with eccentric bracing. In fact, vertical shear-links dissipate the earthquake energy and act like a ductile fuse. In this paper, we studied the effect of this system in increasing the ductility and energy dissipation and also modeled the behavior of this type of eccentric bracing, and compared the hysteresis diagram of the modeled samples with the laboratory samples. We studied several samples of frames with vertical shear-links in order to assess the behavior of this type of eccentric bracing. Each of these samples was modeled in finite element software ANSYS 9.0, and was analyzed under the static cyclic loading. It was found that vertical shear-links have a more stable hysteresis loops. Another analysis showed that using honeycomb beams as the horizontal beam along with steel reinforcement has no negative effect on the hysteresis behavior of the sample. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vertical%20shear-link" title="vertical shear-link">vertical shear-link</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20control" title=" passive control"> passive control</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclic%20analysis" title=" cyclic analysis"> cyclic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title=" energy dissipation"> energy dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=honeycomb%20beam" title=" honeycomb beam"> honeycomb beam</a> </p> <a href="https://publications.waset.org/abstracts/30924/the-effect-of-vertical-shear-link-in-improving-the-seismic-performance-of-structures-with-eccentrically-bracing-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30924.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">496</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25683</span> Experimental Analysis of Tuned Liquid Damper (TLD) with Embossments Subject to Random Excitation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Saberi">Mohamad Saberi</a>, <a href="https://publications.waset.org/abstracts/search?q=Arash%20Sohrabi"> Arash Sohrabi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tuned liquid damper is one the passive structural control ways which has been used since mid-1980 decade for seismic control in civil engineering. This system is made of one or many tanks filled with fluid, mostly water that installed on top of the high raised structure and used to prevent structure vibration. In this article we will show how to make seismic table contain TLD system and analysis the result of using this system in our structure. Results imply that when frequency ratio approaches 1 this system can perform its best in both dissipate energy and increasing structural damping. And also results of these serial experiments are proved compatible with Hunzer linear theory behaviour. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=TLD" title="TLD">TLD</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20table" title=" seismic table"> seismic table</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20system" title=" structural system"> structural system</a>, <a href="https://publications.waset.org/abstracts/search?q=Hunzer%20linear%20behaviour" title=" Hunzer linear behaviour"> Hunzer linear behaviour</a> </p> <a href="https://publications.waset.org/abstracts/6052/experimental-analysis-of-tuned-liquid-damper-tld-with-embossments-subject-to-random-excitation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6052.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">378</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25682</span> Intelligent Semi-Active Suspension Control of a Electric Model Vehicle System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shiuh-Jer%20Huang">Shiuh-Jer Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yun-Han%20Yeh"> Yun-Han Yeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A four-wheel drive electric vehicle was built with hub DC motors and FPGA embedded control structure. A 40 steps manual adjusting motorcycle shock absorber was refitted with DC motor driving mechanism to construct as a semi-active suspension system. Accelerometer and potentiometer sensors are installed to measure the sprung mass acceleration and suspension system compression or rebound states for control purpose. An intelligent fuzzy logic controller was proposed to real-time search appropriate damping ratio based on vehicle running condition. Then, a robust fuzzy sliding mode controller (FSMC) is employed to regulate the target damping ratio of each wheel axis semi-active suspension system. Finally, different road surface conditions are chosen to evaluate the control performance of this semi-active suspension and compare with that of passive system based on wheel axis acceleration signal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acceleration" title="acceleration">acceleration</a>, <a href="https://publications.waset.org/abstracts/search?q=FPGA" title=" FPGA"> FPGA</a>, <a href="https://publications.waset.org/abstracts/search?q=Fuzzy%20sliding%20mode%20control" title=" Fuzzy sliding mode control"> Fuzzy sliding mode control</a>, <a href="https://publications.waset.org/abstracts/search?q=semi-active%20suspension" title=" semi-active suspension"> semi-active suspension</a> </p> <a href="https://publications.waset.org/abstracts/24517/intelligent-semi-active-suspension-control-of-a-electric-model-vehicle-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24517.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">418</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25681</span> Bilateral Telecontrol of AutoMerlin Mobile Robot Using Time Domain Passivity Control</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aamir%20Shahzad">Aamir Shahzad</a>, <a href="https://publications.waset.org/abstracts/search?q=Hubert%20Roth"> Hubert Roth</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper is presenting the bilateral telecontrol of AutoMerlin Mobile Robot having communication delay. Passivity Observers has been designed to monitor the net energy at both ports of a two port network and if any or both ports become active making net energy negative, then the passivity controllers dissipate the proper energy to make the overall system passive in the presence of time delay. The environment force is modeled and sent back to human operator so that s/he can feel it and has additional information about the environment in the vicinity of mobile robot. The experimental results have been presented to show the performance and stability of bilateral controller. The results show the whenever the passivity observers observe active behavior then the passivity controller come into action to neutralize the active behavior to make overall system passive. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bilateral%20control" title="bilateral control">bilateral control</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20operator" title=" human operator"> human operator</a>, <a href="https://publications.waset.org/abstracts/search?q=haptic%20device" title=" haptic device"> haptic device</a>, <a href="https://publications.waset.org/abstracts/search?q=communication%20network" title=" communication network"> communication network</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20domain%20passivity%20control" title=" time domain passivity control"> time domain passivity control</a>, <a href="https://publications.waset.org/abstracts/search?q=passivity%20observer" title=" passivity observer"> passivity observer</a>, <a href="https://publications.waset.org/abstracts/search?q=passivity%20controller" title=" passivity controller"> passivity controller</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20delay" title=" time delay"> time delay</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20robot" title=" mobile robot"> mobile robot</a>, <a href="https://publications.waset.org/abstracts/search?q=environment%20force" title=" environment force"> environment force</a> </p> <a href="https://publications.waset.org/abstracts/39534/bilateral-telecontrol-of-automerlin-mobile-robot-using-time-domain-passivity-control" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39534.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">392</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25680</span> 316L Passive Film Modification During Pitting Corrosion Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amina%20Sriba">Amina Sriba</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, interactions between the chemical elements forming the passive film of welded austenitic stainless steel during pitting corrosion are studied. We pay special attention to the chemical elements chromium, molybdenum, iron, nickel, and silicon since they make up the passive film that covers the fusion zone's surface in the welded joint. Molybdenum and chromium are typically the two essential components that control the three crucial stages of pit formation. It was found that while the involvement of chromium is more prominent during the propagation of a pit that has already begun, the enrichment of the molybdenum element in the passive film becomes apparent from the first stage of pit initiation. Additionally, during the pitting corrosion process, there was a noticeable fluctuation in the quantities of the produced oxides and hydroxide species from zone to zone. Regarding the formed hydroxide species, we clearly see that Nickel hydroxides are added to those of Chromium to constitute the outer layer in the passive film of the fusion zone sample, compared to the base metal sample, where only Chromium hydroxide formed on its surface during the pitting corrosion process. This reaction is caused by the preferential dissolution of the austenite phase instead of ferrite in the fusion zone. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fusion%20zone" title="fusion zone">fusion zone</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20film" title=" passive film"> passive film</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20elements" title=" chemical elements"> chemical elements</a>, <a href="https://publications.waset.org/abstracts/search?q=pit" title=" pit"> pit</a> </p> <a href="https://publications.waset.org/abstracts/186833/316l-passive-film-modification-during-pitting-corrosion-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186833.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">51</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">25679</span> Experimental Analysis of Tuned Liquid Damper (TLD) for High Raised Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Saberi">Mohamad Saberi</a>, <a href="https://publications.waset.org/abstracts/search?q=Arash%20Sohrabi"> Arash Sohrabi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tuned liquid damper is one the passive structural control ways which has been used since mid-1980 decade for seismic control in civil engineering. This system is made of one or many tanks filled with fluid, mostly water that installed on top of the high raised structure and used to prevent structure vibration. In this article, we will show how to make seismic table contain TLD system and analysis the result of using this system in our structure. Results imply that when frequency ratio approaches 1 this system can perform its best in both dissipate energy and increasing structural damping. And also results of these serial experiments are proved compatible with Hunzer linear theory behaviour. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=TLD" title="TLD">TLD</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20table" title=" seismic table"> seismic table</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20system" title=" structural system"> structural system</a>, <a href="https://publications.waset.org/abstracts/search?q=Hunzer%20linear%20behaviour" title=" Hunzer linear behaviour"> Hunzer linear behaviour</a> </p> <a href="https://publications.waset.org/abstracts/6043/experimental-analysis-of-tuned-liquid-damper-tld-for-high-raised-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6043.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> 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