Integrated fault estimation and non-fragile fault-tolerant control design for uncertain Takagi-Sugeno fuzzy systems with actuator fault and sensor fault

Abstract

This study proposes an integrated design of robust fault estimation and non-fragile fault-tolerant control for a class of Takagi-Sugeno fuzzy systems subjected to disturbances, actuator fault and sensor fault. A fuzzy adaptive observer is developed to achieve simultaneous estimations of actuator fault and sensor fault, based on which a new non-fragile output feedback fault-tolerant controller is constructed to compensate for the effects of the disturbances and faults. Moreover, the proposed fault-tolerant controller proves non-fragile, since it offers the ability to suppress the control gain perturbations. Simulation results are presented to illustrate the effectiveness of the proposed approach.