Fault-tolerant control for time-delay switched linear systems against stuck actuator faults

This paper considers the problem of fault-tolerant control system design approach for time-delay switched systems against stuck actuators. The principle of the proposed fault-tolerant control (FTC) is to design a reconfigurable controller using estimated system states, relying on control input adjustments on the redundant actuators to compensate for the effects of stuck actuators. The amount of adjustment is updated based on the transient of fault compensation. The iterative learning observer (ILO) provides both the estimates of the system states and the information on such transients. The fault compensation can be carried out swiftly due to the rapid convergence of the ILO. It is shown that the proposed FTCS ensures that the switched system follows the reference model under both normal conditions and with some stuck actuators. An example is included to illustrate the proposed method.