量化及随机丢包情形下NCSs的故障检测  

Fault Detection for NCSs Subject to Quantization and Random Packet Dropout

作　　者：符晟[1] 方华京[1] 

机构地区：[1]华中科技大学控制科学与工程系,湖北武汉430074

出　　处：《武汉理工大学学报（信息与管理工程版）》2011年第4期536-539,543,共5页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家自然科学基金资助项目(60874053)

摘　　要：研究了具有量化及随机丢包的网络化控制系统的故障检测问题。通过以观测为基础的故障检测滤波器作为残差产生机制,将故障检测滤波器的设计问题转化为H∞模型匹配的问题,同时将量化引入的误差转化成模型不确定性问题。利用李亚普诺夫函数方法,可得到观测误差系统的指数均方稳定性及相对残差的H∞扰动水平,通过解线性矩阵不等式可以得到相应问题的解。仿真结果显示了所提出方法的有效性。The problem of fault detection was dealt with for a class of networked control systems with quantization and data packet random dropout.An observer-based FDF was introduced as a residual generator,the FDF design problem could be transformed as an H∞ model-matching problem.At the same time,the error introduced by quantization was considered as model uncertainty.The mean square stable condition of observed error system and the H∞ disturbance level of relative residual were derived by using Layapunov-Krasovskii approach and associated solution of the problem could be obtained by solving corresponding linear matrix inequality（LMI）.A simulation example was given to demonstrate the effectiveness of the proposed method.

关 键 词：量化误差 随机时延 线性矩阵不等式 网络化控制系统 

分 类 号：TP278[自动化与计算机技术—检测技术与自动化装置]