网络化控制系统的故障诊断与容错控制

Fault Diagnosis and Fault-tolerant Control for Networked Control System

介绍了网络化控制系统几类故障诊断与容错控制方法的基本思想。故障诊断与容错控制对于控制工程实践特别是对安全性有严格要求的控制系统是十分重要的。网络化控制系统通过共享网络资源实现控制而带来了各种优越性的同时,也给传统的控制理论带来了新的挑战。因此需要发展适用于此类异步的、基于信包的控制系统的控制理论与技术。网络化控制系统基于数学模型的故障诊断问题,在建立恰当的网络化系统模型后,可转化一类特定的时延系统故障诊断问题。

Control loops closed via data network, such as internet, are known as Networked Control System (NCS). While NCS offers many advantages over traditional control system architectures, a number of difficulties limit the performance and reliability of NCS arise. The extension of the traditional control theory to these kinds of asynchronous packet-based control systems is needed. Fault diagnosis and fault-tolerant control are very important issues for practical control systems, particularly in safety-critical systems. The designer of fault diagnosis and faulttolerant control algorithm should take the limitations of NCS, such as network-induced time delay and data packet dropouts, into design consideration. The basic ideas of the research works on fault diagnosis and fault-tolerant control for NCS briefly are summarized.