Robust Active FTC based on Sliding Mode Observer for Switching Systems with Actuator Faults: Application to HiMAT Vehicle

Abstract

This present paper proposes a robust active fault tolerant control (FTC) scheme for a class of continuous-time switched systems in the presence of external disturbances and actuator failures. In this FTC strategy, a sliding mode observer (SMO) is developed so that the estimations of system state and actuator fault can be obtained simultaneously. With the obtained estimations information, a switched state feedback fault-tolerant controller is constructed for both compensating the effect of actuator faults and stabilizing the closed-loop system. By using the mode-dependent average dwell time (MDADT) concept and the multiple Lyapunov function sufficient conditions for the existence of the proposed SMO and fault tolerant controller are derived in terms of linear matrix inequalities (LMIs) optimization. Finally, simulation example of a highly maneuverable aircraft technology (HiMAT) vehicle is considered to illustrate the applicability and performance of the developed results.
DOI: 10.61416/ceai.v27i1.9062