Active Fault Tolerant Control for a Class of Networked Systems with Partial Actuator Failures

Abstract

This paper deals with the active fault tolerant control problem for a class of discrete-time networked control systems with partial actuator failures. The random packet dropout phenomena induced by limited-capacity network cable in both forward and backward channels are taken into consideration. A binary switching stochastic sequence with a known distribution is employed to describe the packet dropout phenomena. The desired controller is reconfigured once a specific fault of actuator failure is diagnosed and, meanwhile, both the stability and the H∞ disturbance attenuation level are guaranteed for the closed-loop system by using the remaining reliable actuators. The model of an Internet-based three-tank system with possible actuator failure is built up and simulation studies are carried out to show the applicability of the proposed control design scheme.