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Mathematical Problems in Engineering
Volume 2014, Article ID 406916, 9 pages
Research Article

Active-Varying Sampling-Based Fault Detection Filter Design for Networked Control Systems

1School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China
2School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
3Key Laboratory of Manufacturing Industrial Integrated Automation, Shenyang University, Shenyang, Liaoning 110044, China

Received 17 March 2014; Revised 13 June 2014; Accepted 14 June 2014; Published 3 July 2014

Academic Editor: Masoud Hajarian

Copyright © 2014 Yu-Long Wang 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.


This paper is concerned with fault detection filter design for continuous-time networked control systems considering packet dropouts and network-induced delays. The active-varying sampling period method is introduced to establish a new discretized model for the considered networked control systems. The mutually exclusive distribution characteristic of packet dropouts and network-induced delays is made full use of to derive less conservative fault detection filter design criteria. Compared with the fault detection filter design adopting a constant sampling period, the proposed active-varying sampling-based fault detection filter design can improve the sensitivity of the residual signal to faults and shorten the needed time for fault detection. The simulation results illustrate the merits and effectiveness of the proposed fault detection filter design.