Adaptive Fault-Tolerant Control Against Multiple Actuator Faults for Linear Systems with Mismatched Uncertainty and Disturbance

This paper studies the design of an adaptive fault-tolerant controller under three kinds of typical actuator faults such as outage, loss of effectiveness, and stuck. Both the system parameter uncertainties and external disturbances are mismatched which can lead to more general results. It is assumed that the effects of actuator faults, system uncertainties, and disturbances are upper bounded while the bounds are unknown in prior. The proposed method can stabilize the system and guarantee that the adaptive parameters are bounded regardless of faults. One advantage of the proposed controller is that there is no need for the information of time and place of fault occurrence. Another advantage of the proposed controller is that it can handle the faults caused by effectiveness of actuator degrading continuously in time. The effectiveness of the proposed controller is tested via simulations using a rocket fairing structural-acoustic model.