Fault detection based on H_∞ states observer for networked control systems  

作　　者：Zhu Zhangqing Jiao Xiaocheng 

机构地区：[1]Dept. of Control and System Engineering, Nanjing Univ., Nanjing 210093, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2009年第2期379-387,共9页系统工程与电子技术（英文版）

基　　金：supported partly by the Natural Science Foundation China (70571032).

摘　　要：The influence of random short time-delay to networked control systems （NCS） is changed into an unknown bounded uncertain part. Without changing the structure of the system, an Hoo states observer is designed for NCS with short time-delay. Based on the designed states observer, a robust fault detection approach is proposed for NCS. In addition, an optimization method for the selection of the detection threshold is introduced for better tradeoff between the robustness and the sensitivity. Finally, some simulation results demonstrate that the presented states observer is robust and the fault detection for NCS is effective.The influence of random short time-delay to networked control systems （NCS） is changed into an unknown bounded uncertain part. Without changing the structure of the system, an Hoo states observer is designed for NCS with short time-delay. Based on the designed states observer, a robust fault detection approach is proposed for NCS. In addition, an optimization method for the selection of the detection threshold is introduced for better tradeoff between the robustness and the sensitivity. Finally, some simulation results demonstrate that the presented states observer is robust and the fault detection for NCS is effective.

关 键 词：networked control systems fault detection states observers TIME-DELAYS ROBUSTNESS 

分 类 号：TN949.12[电子电信—信号与信息处理] TP273[电子电信—信息与通信工程]