Fault Detection and Isolation for Nonlinear System via ESO

Abstract

In this paper fault detection and isolation problems are studied for a certain class of nonlinear systems. Under some structural conditions, multiple High-Order Sliding-Mode observers are proposed. The value of the equivalent output injection is used for detecting faults and the multiple-model approach for isolating particular faults in the system. The proposed method provides fast detection and isolation of actuator and plant faults. Simulation results support the proposed approach.