Output Integral Sliding Mode Fault Tolerant Control for Nonlinear Systems With Actuator Fault and Mismatched Disturbance

In this paper, an adaptive output sliding mode fault tolerant control (AOSMFTC) strategy is proposed for a class of nonlinear systems with actuator fault and mismatched disturbance. A composite observer is initially proposed to estimate the state, disturbance, and actuator fault efficiency factor. Subsequently, by introducing a sliding mode observer, the bias actuator fault is reconstructed. Furthermore, in accordance with the estimated information, the AOSMFTC scheme is presented to tolerate the fault, meanwhile the disturbance is attenuated. The
$H_{\infty } $
performance is considered for the robustness of the system. Finally, a B747-100/200 aircraft model and an electric circuit system are simulated; the simulation results illustrate the effectiveness of the proposed method.