Fault detection for networked control systems subject to quantisation and packet dropout |
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Authors: | Yue Long |
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Affiliation: | College of Information Science and Engineering , Northeastern University , Shenyang 110819 , China |
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Abstract: | This article addresses the stochastic fault detection (SFD) problem in finite-frequency domain for a class of networked control systems (NCSs) with respect to signal quantisation and data packet dropout. Considering a logarithmic quantiser and Markovian packet dropout, the NCS is modelled as a Markov jump linear system (MJLS) with quantisation error. Further, a new definition of finite-frequency stochastic H ? index is given, which gives a measurement of sensitivity. Subsequently, sufficient conditions are derived to guarantee that the MJLS can achieve such a performance. By virtue of the obtained conditions, the fault detection filters (FDFs) are designed in finite-frequency domain, which are valid in characterising the disturbance attenuation performance and finite-frequency fault sensitivity performance. Finally, a simulation example is given to illustrate the method and its effectiveness. |
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Keywords: | networked control systems fault detection measurement quantisation data packet dropout finite-frequency |
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