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

作　　者：李斌[1] 万一鸣[1] 叶昊[1] 

机构地区：[1]清华大学自动化系,北京100084

出　　处：《南京航空航天大学学报》2011年第B07期22-27,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(60974059)资助项目

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。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.

关 键 词：故障检测 网络化控制系统 时延 丢包 量化误差 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]