Adaptive fault-tolerant output-feedback control of LTI systems subject to actuator saturation

This paper is concerned with the problem of designing adaptive fault-tolerant output-feedback controllers for linear time-invariant (LTI) systems with actuator saturation. By combining the linear matrix inequality (LMI) approach for output-feedback controllers design and adaptive method, a method of designing adaptive reliable output-feedback controllers is proposed, where the controller parameter matrices are updated automatically to compensate the controller failures effects on systems based on the online estimations of eventual faults. The designs are developed in the framework of LMI approach, which can enlarge the domain of asymptotic stability of closed-loop systems in the cases of actuator saturation and actuator failures. An example is given to illustrate the efficiency of the design method.