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Journal of Control Science and Engineering
Volume 2012, Article ID 734758, 7 pages
Research Article

Robust Fault-Tolerant Control for Uncertain Networked Control Systems with State-Delay and Random Data Packet Dropout

1School of Control Science and Engineering, Shandong University, Jinan 250061, China
2Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS, Canada B3J 2X4

Received 22 November 2011; Accepted 9 February 2012

Academic Editor: Yang Shi

Copyright © 2012 Xiaomei Qi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A robust fault-tolerant controller design problem for networked control system (NCS) with random packet dropout in both sensor-to-controller link and controller-to-actuator link is investigated. A novel stochastic NCS model with state-delay, model uncertainty, disturbance, probabilistic sensor failure, and actuator failure is proposed. The random packet dropout, sensor failures, and actuator failures are characterized by a binary random variable. The sufficient condition for asymptotical mean-square stability of NCS is derived and the closed-loop NCS satisfies 𝐻 performance constraints caused by the random packet dropout and disturbance. The fault-tolerant controller is designed by solving a linear matrix inequality. A numerical example is presented to illustrate the effectiveness of the proposed method.