TY - JOUR ID - 72499 TI - Design of Direct Exponential Observers for Fault Detection of Nonlinear MEMS Tunable Capacitor JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - rezazadeh, Ghader AU - Mobki, Hamed AD - mechanical engineering, Urmia university AD - Mecanical Engineering, Tabriz University Y1 - 2015 PY - 2015 VL - 28 IS - 4 SP - 634 EP - 641 KW - Nonlinear observer KW - exponential observer KW - Lyapunov theorem KW - micro tunable capacitor DO - N2 - In this paper a novel method is proposed for construction of an exponential observer for nonlinear system. The presented method is based on direct solution of dynamic error without any linearzing of nonlinear terms. Necessary and sufficient conditions for construction of direct observer are presented. Stability of the observer is checked using Lyapunov theorem. Also the ability of this observer is checked with implementing of observer for fault detection of micro tunable capacitor subjected to nonlinear electrostatic force. UR - https://www.ije.ir/article_72499.html L1 - https://www.ije.ir/article_72499_45cf92f09b581c5e75091bb8ce05fc42.pdf ER -