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.