基于信息调度的网络控制系统的故障诊断

Fault Diagnosis for Networked Control Systems with Information-scheduling

研究了基于静态信息调度框架的网络控制的故障诊断问题。表征故障信息的残差信号由一个周期性的未知输入观测器观测出的系统状态和参考模型的状态构造而来。文中给出了此类观测器存在的充分条件,并根据状态估计误差和Lyapunov理论推导出观测器稳定的条件。最后给出了仿真实例验证了提出方法的有效性。

In networked control systems the information is exchanged using a network among control system components. The performance of the closed - loop system is not only determined by the characteristics of the control system, but also determined by the scheduling manner imposed by network. The designer of fault diagnosis should take the new peculiarities into account. In this paper, networked control systems are modeled based on information scheduling scheme and the fault detection problems of them are studied. The residual signal is generated using an unknown input observer. Sufficient conditions for the existence of unknown input observer are derived. Several stability results regarding the state estimation error are established. Simulation results are given to show the effectiveness of the design.