具有随机时延的网络化控制系统基于等价空间的故障诊断

随着控制系统技术的飞速发展，把网络环节引入到传统的控制系统实现迅速准确的远 距离闭环控制是人们日益关注的课题．而网络中由信息的碰撞、重发而产生的网络延迟对控 制系统本身带来的负面影响却不容忽视．本文针对网络化控制系统(Networked Control S ystem，简称NCS)的随机延时，提出了延时估计和在线获得延时数据的两种方法，建立控制 对象的数学模型．利用z变换来处理延时，由等价关系产生残差，通过参数设计解耦干扰向 量，从而对网络化系统的控制故障进行了诊断，并提供了仿真结果．

PARITY SPACE BASED FAULT DIAGNOSIS OF NETWORKED CONTROL SYSTEM WITH RANDOM DELAY

With the rapid development of the control technology, bringing network into traditional control system and realizing long-distance close-loop control has gained more and more attention. But negative effect of the network-induced delay caused by information collision and resending can not be ignored. This paper proposes two methods about delay estimation and the delay data procurement on-line to deal with the random delay of networked control system(NCS), then sets up a mathematical plant model. It makes use of z-transform to dispose delay, generates residual through parity relations, decouples disturbance by parameter design, then diagnoses the control fault of the networked system, and provides the simulation results.