{"title":"Contributions to Design of Systems Actuated by Shape Memory Active Elements","authors":"Daniel Amariei, Calin O. Miclosina, Ion Vela, Marius Tufoi, Cornel Mituletu","volume":47,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1178,"pagesEnd":1184,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/3172","abstract":"Even it has been recognized that Shape Memory\nAlloys (SMA) have a significant potential for deployment actuators,\nthe number of applications of SMA-based actuators to the present\nday is still quite small, due to the need of deep understanding of the\nthermo-mechanical behavior of SMA, causing an important need for\na mathematical model able to describe all thermo-mechanical\nproperties of SMA by relatively simple final set of constitutive\nequations. SMAs offer attractive potentials such as: reversible strains\nof several percent, generation of high recovery stresses and high\npower \/ weight ratios. The paper tries to provide an overview of the\nshape memory functions and a presentation of the designed and\ndeveloped temperature control system used for a gripper actuated by\ntwo pairs of differential SMA active springs. An experimental setup\nwas established, using electrical energy for actuator-s springs heating\nprocess. As for holding the temperature of the SMA springs at certain\nlevel for a long time was developed a control system in order to\navoid the active elements overheating.","references":"[1] Gilbertson, R.,G., Muscle Wires Project Book, Mondo Tronics, CA,\n2000.\n[2] H. Funakabo, ed. translated from Japanese by J.B. Kennedy, Shape\nMemory Alloys, Gordon and Breach Science Publishers, Amsterdam,\nHolland, 1987.\n[3] T.W. Duerig, C. M. Wayman, \"An Introduction to Martensite and Shape\nMemory,\" Engineering Aspects of Shape Memory Alloys, Butterworth-\nHeinemann Publishers, London, pp. 3-20, 1990.\n[4] J. Perkins, and D. Hodgson, \"The Two Way Shape Memory Effect,\"\nEngineering Aspects of Shape Memory Alloys, Butterworth-Heinemann\nPublishers, London, pp. 195-206, 1990.\n[5] D. St\u00f6ckel, Int. on New Actuators, Actuator, Bremen, 79-84, 1992.\n[6] Miclo\u253c\u0192in\u00e2, C.; Vela, I.; Gillich, G.-R.; Amariei D. & Vela, D., \"On the\nuse of robotic grippers with shape memory alloy actuators in handling\nlight-weight workpieces\"- the 18th international DAAAM symposium,\n24-27th October, pp. 451-452, 2007.\n[7] N. Ma, G. Song, Control of shape memory alloy actuator using pulse\nwidth modulation, Smart Materials & Structures 12 712, 2003.\n[8] D. Reynaerts, H. Van Brussel, Design aspects of shape memory\nactuators, Mechatronics, No. 8, pp. 635-656, 1998.\n[9] Wang, J.H.; Xu, F.; Yan, S.Z; & Wen, S.Z., \"Electrothermal Driving\nMechanism for SMA Spring Actuators\" Materials Science Forum, 423-\n424; 461-465, 2003.\n[10] D. Reynaerts, H. Van Brussel, Design aspects of shape memory\nactuators, Mechatronics, No. 8, pp. 635-656, 1998.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 47, 2010"}