Abstract
This paper proposes a robust integrated fault estimation (FE) and fault tolerant control (FTC) strategy for a class of continuous-time switched systems in the presence of unknown external disturbances and sensor faults. The main idea focuses on designing a switched descriptor observer to achieve simultaneous estimations of system states and sensor faults. With the acquired estimations information, an integrated development of the estimated state feedback fault-tolerant controller is constructed to compensate for the fault effects by stabilizing the switched closed-loop system. Based on the Average Dwell Time (ADT) concept and the Lyapunov-Krasovskii functional method, new and less conservative stability conditions are established with a prescribed H∞ performance level with a single-step linear matrix inequality (LMI) formulation. Finally, both a numerical example and a Highly Maneuverable Aircraft Technology (HiMAT) vehicle are applied to illustrate the effectiveness of the developed strategy.
