, Volume 7, Issue 4, pp 509-515
Date: 11 Nov 2010

Guaranteed cost active fault-tolerant control of networked control system with packet dropout and transmission delay

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The problem of guaranteed cost active fault-tolerant controller (AFTC) design for networked control systems (NCSs) with both packet dropout and transmission delay is studied in this paper. Considering the packet dropout and transmission delay, a piecewise constant controller is adopted. With a guaranteed cost function, optimal controllers whose number is equal to the number of actuators are designed, and the design process is formulated as a convex optimal problem that can be solved by existing software. The control strategy is proposed as follows: when actuator failures appear, the fault detection and isolation unit sends out the information to the controller choosing strategy, and then the optimal stabilizing controller with the smallest guaranteed cost value is chosen. Two illustrative examples are given to demonstrate the effectiveness of the proposed approach. By comparing with the existing methods, it can be seen that our method has a better performance.

This work was supported by National Outstanding Youth Foundation (No. 60525303), National Natural Science Foundation of China (No. 60704009), Key Project for Natural Science Research of Hebei Education Department (No. ZD200908), and the Doctor Fund of Yan Shan University (No.B203).
Xiao-Yuan Luo received the M. Sc. and Ph.D. degrees from the Institute of Electrical Engineering, Yanshan University, PRC in 2001 and 2004, respectively. He is currently an associate professor in Yanshan University.
His research interests include fault detection and fault-tolerant control, multi-agent, and networked control systems.
Mei-Jie Shang received the B.Eng. degree from the Institute of Electrical Engineering, Yanshan University, PRC in 2007. She is currently a graduate student in Yanshan University.
Her research interests include faulttolerant control of networked control system.
Cai-Lian Chen received the B. Eng. degree in automation and the M. Sc. degree in control theory and control engineering from Yanshan University, Qinhuangdao, PRC in 2000 and 2002, respectively. She is currently an associate professor in Shanghai Jiao Tong University, PRC.
Her research interests include fuzzy control, robust control for time-delay systems, and their applications in chaotic systems and networks.
Xin-Ping Guan received the master degree in applied mathematics in 1991, and the Ph.D. degree in electrical engineering in 1999, both from Harbin Institute of Technology, PRC. Since 1986, he has been with Yanshan University, PRC, where he is currently a professor of control theory and control engineering. In 2007, he also joined Shanghai Jiao Tong University, PRC.
His research interests include robust congestion control in communication network, chaos control, and networked control system.