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中文摘要：
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嚣的故障检测问题．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巩故障检测的矩阵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．
英文摘要：
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.
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