Fault-tolerant control of a class of switched systems with strong structural uncertainties with application to haptic display systems

This paper presents a robust fault-tolerant control method for a class of uncertain switched systems with strong structural uncertainties and applied it to haptic display systems. The proposed controller can stabilize the switched systems containing strong uncertainties with actuator faults and its nominal systems (i.e., without actuator faults) without necessarily changing any structures and/or parameters of the proposed controllers, and treats faulty and healthy actuators in a unified way. The proposed method is independent of arbitrary switching laws. A practical haptic display system with switched virtual environments shows the effectiveness of the proposed method.