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Vol. 22, Special Issue, June 2013, pp. 119-125




Fault Detection for Networked Control Systems Based on Wireless Sensor Networks
Jie Zhang, Pengfei Guo, Ming Lv, Yuming Bo

School of Automation, Nanjing University of Science and Technology, 200 Xiao Ling Wei ST., Nanjing, 210094, China

Tel.: +86-02584439725-805

R & D Center, North Information Control Group Co., Ltd., 528 Jiang Jun RD., Nanjing, 211153, China

E-mail: zhangjie_njust@163.com


Received: 15 April 2013   /Accepted: 20 June 2013   /Published: 28 June 2013

Digital Sensors and Sensor Sysstems


Abstract: Focusing on a class of networked control systems built around wireless sensor networks (WSN), the controller and the actuator in systems are assumed to be time-driven and the clocks are fully synchronized. The observer based on discrete switched systems is designed to detect faults which occur in the system. Firstly, by studying the transmission characteristics of data with wireless sensor networks, the augmented fault observer is constructed, and the observer is equivalent to the discrete switched system. Secondly, based on Lyapunov stability theory, the stability condition of observer can be viewed as a linear matrix inequality and the stability of system is proved. When the system is normal, if the given inequality condition is satisfied, the observer system is stable. When a fault occurs, the observer can detect the fault by the rapid change of residue. Finally, an illustrative example is given to demonstrate the effectiveness of the proposed method.


Keywords: Wireless sensor networks, Networked control systems, Fault observers, Discrete switched systems.


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