Fault-Tolerant Control for Networked Control Systems with Imperfect Measurements

Abstract

This paper studies the problem of active fault-tolerant control for networked control systems with imperfect measurements. A unified measurement model is utilized to take time-varying delay and random packet dropout into consideration simultaneously. The fault is asymptotically estimated via a fault estimation filter. Based on the fault estimation information, an output feedback fault-tolerant controller is constructed to guarantee the stability and a certain performance constraint of the closed-loop systems. In terms of linear matrix inequality, a sufficient condition is derived for the existence of fault estimation filter and fault-tolerant controller. Finally, a numerical example is provided to illustrate the effectiveness of the proposed method.