The problem of robust fault detection is studied for a class of networked control system for flight vehicles with Markov short delay and packet dropout. The networked control system for flight vehicle is modeled as a discrete finite Markov jump linear system by combining Markov short delay and packet dropout as a finite Markov process and establishing corresponding model for packet dropout. Based on this model, the residual generator is constructed and the problem of fault detection is formulated as a H∞ filtering problem. The existence condition of the fault detection filter and the solutions are derived by using the linear matrix inequality technique. Simulation results show that the modeling method can reduce the influence of packet dropout on fault detection capability effectively. The results also show that the proposed fault detection method is sensitive to the fault and robust to unknown disturbance.%针对同时存在马尔可夫短时延和数据包丢失的网络环境,研究了一类飞行器网络控制系统的鲁棒故障检测问题.通过将马尔可夫短时延与丢包建模为一个有限马尔可夫链,并针对丢包建立相应的数学模型,飞行器网络控制系统被建模为离散有限马尔可夫跳变线性系统.在此基础上构建残差发生器,相应的故障检测问题归结为H∞滤波问题.以线性矩阵不等式的形式给出并证明了故障检测滤波器的存在条件和求解方法.仿真结果表明,所提出的建模方法能够有效地减少丢包对故障检测性能的影响,同时上述故障检测方法对故障敏感,对未知扰动具有鲁棒性.
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