IJE TRANSACTIONS A: Basics Vol. 28, No. 4 (April 2015) 634-641   

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H. Mobki, M. Sadeghi and G. Rezazadeh
( Received: September 06, 2014 – Accepted: January 29, 2015 )

Abstract    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.


Keywords    nonlinear observer, exponential observer, Lyapunov theorem, micro tunable capacitor


چکیده    در این مقاله روش جدیدی برای ساخت روئیتگر نمایی برای سیستم غیرخطی ارائه شده است. روش ارائه شده بر پایه حل معادله دیفرانسیل خطای دینامیکی بدون هر گونه خطی سازی می باشد. شرایط لازم و کافی برای تشکیل روئیتگر مشخص شده و پایداری روئیتگر با استفاده از تئوری لیاپانوف بررسی شده است. همچنین توانایی روئیتگر در عیب یابی میکرو خازن قابل تنظیم که تحت تاثیر نیروی غیر خطی الکترواستاتیک قرار دارد بررسی شده است.



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