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存在时延、丢包和量化误差的网络化控制系统故障检测方法

Fault Detection of Networked Control Systems with Time-Varying Delay,Packet Dropout and Quantization Error

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【作者】 李斌万一鸣叶昊

【Author】 Li Bin,Wan Yiming,Ye Hao(Department of Automation,Tsinghua University,Beijing,100084,China)

【机构】 清华大学自动化系

【摘要】 研究了同时存在未知长时延、丢包和量化误差条件下的网络化控制系统(Networked control systems,NC-Ss)的故障检测问题。通过将网络诱导时延的影响转化为polytopic不确定性,并将丢包和量化误差的影响描述成模型的未知输入,把最优残差发生器的设计等效为一个模型匹配问题,并采用基于参考模型的方法求得最优解。实验结果显示,当存在丢包、时延和量化误差时,本文的方法可以快速准确地检测到故障。

【Abstract】 The problem of fault detection is studied for a class of networked control systems(NCSs) with unknown long time-varying delay,quantization error and packet dropout.The design of the optimal residual generator is formulated as a model match problem by transforming the network-induced delay into time-varying polytopic uncertainty and describing quantization error and packet dropout as unknown model inputs respectively,and solved by utilizing the so-called reference-model based method.Experimental results show that the proposed method can quickly and exactly detect the fault when these network factors exist.

【基金】 国家自然科学基金(60974059)资助项目
  • 【文献出处】 南京航空航天大学学报 ,Journal of Nanjing University of Aeronautics & Astronautics , 编辑部邮箱 ,2011年S1期
  • 【分类号】TP273
  • 【被引频次】3
  • 【下载频次】280
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