基于观测器的网络控制系统故障检测  

Observer-Based Fault Detection for Network Control Systems

作　　者：刘云霞[1] 陈静[2] 

机构地区：[1]深圳信息职业技术学院,广东深圳518029 [2]日照职业技术学院,山东日照276826

出　　处：《临沂师范学院学报》2009年第3期125-130,共6页Journal of Linyi Teachers' College

基　　金：国家自然科学基金(60774071);教育部博士点基金(20050422036);山东省博士基金(2005BS01007)资助

摘　　要：对于网络时滞小于一个采样周期的网络控制系统,建立了系统的离散化模型,并在此基础上研究了基于观测器的故障检测问题.把不确定时滞对残差系统产生的影响描述为未知输入,将残差产生器设计归结为后置滤波器和观测器增益矩阵的求解,给出了网络控制系统H∞故障检测的矩阵Ricatti方程方法,进一步通过算例进行MATLAB仿真研究,验证提出算法的有效性.For network control system with unknown network-induced time delay of less than one sampling period, a discrete-time system model is firstly established and the influence of the unknown network-induced time delay is handled as an unknown input. Then the problem of observer-based fault detection for NCS can be solved by applying an H to optimization approach. Both the observer gain matrix and the post-filter have been obtained by solving a matrix Riccati equation, and furthermore a numerical example is given to show the effectiveness of the proposed method by using MATLAB tool.

关 键 词：H∞故障检测 网络控制系统 网络时滞 Ricatti方程 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]