Fault tolerant control for T-S fuzzy systems with simultaneous actuator and sensor faults

Abstract

This paper studies the problem of fault estimation (FE) and the active fault tolerant control (FTC) for a class of Takagi-Sugeno (T-S) fuzzy systems with time-varying delay and simultaneous actuator and sensor faults. Based on the fault estimation algorithm, an adaptive observer-based controller is designed to guarantee the dynamic error system to be asymptotically stable and satisfy the H ∞ performance index. Then, based on the information of online fault-estimation information, a dynamic output feedback fault tolerant controller is designed to compensate the fault effects on the closed-loop fuzzy system. Finally, simulation results are given to verify the effectiveness of the proposed method.