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Mathematical Problems in Engineering
Volume 2013, Article ID 157063, 8 pages
Research Article

Fault Detection for Quantized Networked Control Systems

1Key Laboratory of Manufacturing Industrial Integrated Automation, Shenyang University, Shenyang 110044, China
2Institute of Information, Shenyang University, Shenyang 110044, China
3School of Electronics and Information, University of Science and Technology, Zhenjiang 212003, China

Received 21 August 2013; Accepted 5 October 2013

Academic Editor: Tao Li

Copyright © 2013 Wei-Wei Che 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.


The fault detection problem in the finite frequency domain for networked control systems with signal quantization is considered. With the logarithmic quantizer consideration, a quantized fault detection observer is designed by employing a performance index which is used to increase the fault sensitivity in finite frequency domain. The quantized measurement signals are dealt with by utilizing the sector bound method, in which the quantization error is treated as sector-bounded uncertainty. By using the Kalman-Yakubovich-Popov (GKYP) Lemma, an iterative LMI-based optimization algorithm is developed for designing the quantized fault detection observer. And a numerical example is given to illustrate the effectiveness of the proposed method.