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Vol. 160, Issue 12, December 2013, pp. 202-208




Fault Detection for Wireless Network Control System Based on Sliding Mode Observer
1 Pengfei GUO, 1 Jie ZHANG, 2 Ming LV, 1 Yuming BO

1 School of Automation, Nanjing University of Science & Technology, Nanjing, 210094, P. R. China

2 Information Overall Department, North Information Control Group Co., Ltd., Nanjing, 211153, P. R. China
Tel.: +86 15951890784
E-mail: guopengfeieason@gmail.com


Received: 25 September 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems


Abstract: This paper considers the fault detection problem of wireless network control system with time delay and uncertainties. For a class of model which has bounded disturbance and unknown fault, a sliding mode observer is designed for the situation that all the states of the system can be measured and no missing measurement occurs. We convert the design of fault detection observer to the design of reaching motion and sliding motion, by the use of Lyapunov function, a sufficient condition for sliding motion with time delay independent and uncertainties is acquired through linear matrix inequality, while the nonlinear item in observer is also designed. Finally, the effectiveness of proposed method is demonstrated by simulation results.


Keywords: Fault detection, Wireless network control system (WNCS), Sliding mode observer, linear matrix inequality (LMI).


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