【作者】 刘云霞； 丁强； 钟麦英；

【Author】 LIU Yun-xia DING Qiang ZHONG Mai-ying(School of Control Science and Engineering,Shandong Univereity,Jinan 250061,China)

【机构】 山东大学控制科学与工程学院；

【摘要】 研究了具有不确定时延的网络控制系统的故障诊断问题.提出了一种新的性能指数,在此基础上将具有不确定时延和范数有界未知输入影响的网络控制系统的基于观测器的故障诊断滤波器设计问题归结为H_∞-滤波问题,并通过选择适当的加权矩阵和观测器增益矩阵,求解H_∞-滤波问题的最优解,即该解能最大化残差对于故障信号的灵敏度且能够确保对于未知输入和不确定时延鲁棒性.应用线性矩阵不等式技术,给出并证明了该解存在条件和求解方法.最后通过简例说明了该方法的有效性.更多还原

【Abstract】 Problems related to fault detection filter design for networked control systems with uncertain net- work-induced delay and L₂ norm bounded unknown input are studied.By introducing a new optimization per- formance index,the design of observer-based robust fault detection filter for networked control systems can be formulated as a H_∞-filtering problem,and further be solved by suitably selecting weighting matrix and observer gain matrix,which could maximize the sensitivity of residual to fault and simultaneously guarantee the robust- ness to network-induced delay as well unknown input.The solvable condition of this optimization problem and further the solutions are derived by employing linear matrix inequality techniques.A numerical example illus- trates the effectiveness of the proposed approach.更多还原