Systems Engineering and Electronics

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Fault detection and optimization for networked control systems with uncertain time-varying delay

Qing Wang1, Zhaolei Wang 1,2,*, Chaoyang Dong3, and Erzhuo Niu4   

  1. 1. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China;
    2. Beijing Aerospace Automatic Control Institute, Beijing 100854, China;
    3. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;
    4. Flight Automatic Control Research Institute, Aviation Industry Corporation, Xi’an 710065, China
  • Online:2015-06-25 Published:2010-01-03

Abstract:

The observer-based robust fault detection filter design and optimization for networked control systems (NCSs) with uncertain time-varying delays are addressed. The NCSs with uncertain time-varying delays are modeled as parameter-uncertain systems by the matrix theory. Based on the model, an observer-based residual generator is constructed and the sufficient condition for the existence of the desired fault detection filter is derived in terms of the linear matrix inequality. Furthermore, a time domain optimization approach is proposed to improve the performance of the fault detection system. To prevent the false alarms, a new threshold function is established, and the solution of the optimization problem is given by using the singular value decomposition (SVD) of the matrix. A numerical example is provided to illustrate the effectiveness of the proposed approach.