TY - JFULL AU - Kazuo Komatsu and Hitoshi Takata PY - 2009/12/ TI - Design of Nonlinear Observer by Using Augmented Linear System based on Formal Linearization of Polynomial Type T2 - International Journal of Electrical and Computer Engineering SP - 2522 EP - 2526 VL - 3 SN - 1307-6892 UR - https://publications.waset.org/pdf/724 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 35, 2009 N2 - The objective of this study is to propose an observer design for nonlinear systems by using an augmented linear system derived by application of a formal linearization method. A given nonlinear differential equation is linearized by the formal linearization method which is based on Taylor expansion considering up to the higher order terms, and a measurement equation is transformed into an augmented linear one. To this augmented dimensional linear system, a linear estimation theory is applied and a nonlinear observer is derived. As an application of this method, an estimation problem of transient state of electric power systems is studied, and its numerical experiments indicate that this observer design shows remarkable performances for nonlinear systems. ER -