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Decentralised fault detection of large-scale systems with limited network communications

Decentralised fault detection of large-scale systems with limited network communications

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  • Author(s): W. Li 1, 2 ; W.H. Gui 3 ; Y.F. Xie 3 ; S.X. Ding 2
    • View affiliations
    • Affiliations: 1: School of Mechanical Engineering, China University of Mining and Technology, Xuzhou, People's Republic of China
      2: Institute for Automatic Control and Complex Systems, University of Duisburg-Essen, Duisburg, Germany
      3: School of Information Science and Engineering, Central South University, Changsha, People's Republic of China
  • Source: Volume 4, Issue 9, September 2010, p. 1867 – 1876
    DOI:  10.1049/iet-cta.2008.0604 , Print ISSN 1751-8644, Online ISSN 1751-8652
© The Institution of Engineering and Technology
Published

An optimal decentralised fault detection (FD) system is proposed for a class of discrete-time large-scale systems, where limited information exchange among subsystems is enabled with communication networks. Such an FD system consists of two parts in each subsystem: a residual generator (RG) and a residual evaluator. By taking the advantages of network communications, the RGs are designed to match a proper reference model in a stochastic sense such that a best trade-off between the robustness against disturbances and the sensitivity to faults can be achieved. In each residual evaluator, a norm-based evaluation function is selected for evaluating residual signals and a corresponding threshold is calculated for detecting the occurrences of faults. All the solutions are presented in the form of linear matrix inequalities. Finally, a numerical example is given to illustrate the results and the improvement achieved by applying network communications.

Inspec keywords: fault diagnosis; access protocols; linear matrix inequalities; discrete time systems; telecommunication control; stochastic processes; telecommunication networks; multivariable systems; large-scale systems

Other keywords: residual generator; norm based evaluation function; stochastic sense; information exchange; limited network communication; discrete time large scale system; linear matrix inequalities; decentralised fault detection; residual evaluator

Subjects: Control applications in telecommunications; Linear algebra (numerical analysis); Multivariable control systems; Linear algebra (numerical analysis); Discrete control systems; Telecommunication applications

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