基于观测器的网络控制系统的故障检测

研究了具有输出传输长时延的网络控制系统基于观测器的故障检测,在总结其设计方法的基础上利用预测状态作为控制器的输入,设计了具有延迟补偿功能的状态观测器,通过求取观测器增益矩阵来使得状态重构能跟上实际状态的响应性能。产生的残差信号对干扰信号和不确定项具有较强的鲁棒性,同时对故障信号具有较高的灵敏度。最后给出了网络控制系统基于观测器的故障检测的设计步骤。

Fault Detection Based on Observer for Networked Control System

The fault detection based on observer for networked control system with output time-delay is discussed.using the predicted state as controller input,the state observer is designed to compensate the time-delay.The observer gain matrix is chosen such that the observer estimation track the true state.The residual makes the sensitivity of fault minimum and simultaneously guarantee the robustness to unknown input and disturbance.At last,the approach of fault detection based on observer for networked control system is given.