具有长时延和丢包的网络控制系统的故障检测

Fault Detection for Networked Control Systems with Long Time-Delays and Data Dropout

研究了具有长时延和数据包丢失的网络控制系统,针对网络控制系统故障检测问题,假设数据包丢失率一定时,根据执行器接收数据包的情况,设计了系统的故障观测器,用建模为异步动态系统进行了稳定性分析,当条件满足时,整个系统是指数稳定的。通过建立的检测模型,研究了系统的故障检测,并进行仿真。当系统发生故障时,观测器残差能够迅速发生跳变,从而检测出故障的发生。仿真结果验证了所提出方法的有效性。

The fault detection problem of networked control systems with long time-delays and data dropout is studied. Based on the fixed rate of the data packet dropout, the state observers of system are designed according to the conditions of data arrival of actuator, which is modeled as an asynchronous dynamic system with rate constraints on events. Then the exponential stability condition of the observer system is given. When a fault occurs, the observer residue can change rapidly to detect the fault. A numerical example shows the effectiveness of the proposed method.