Nonlinear system sensor fault estimation

Authors:	Zhang Qinghua, INRIA, France Besançon Gildas, LAG-ENSIEG, France
Topic:	6.4 Safeprocess
Session:	Fault Detection and Isolation for Nonlinear Systems
Keywords:	fault detection and isolation, nonlinear system, high gain observer, adaptive estimation

Abstract

Based on the techniques of high gain observer and adaptive estimation,an algorithm is proposed in this paper for sensor fault estimationin nonlinear systems. It is essentially assumed that a high gainobserver exists for the fault-free system. A high gainadaptive observer is then designed for sensor fault estimation.The convergence of the algorithm is established under a persistentexcitation condition.