网络控制系统的时延对其稳定性的影响及控制方法

Effect of networked control systems delay on its stability and the control methods

研究了网络控制系统中存在的时延对系统稳定性的影响及补偿方法;把系统按时延相对于采样周期、定常或时变、确定或随机分类,讨论了相应的随机时延在相互独立或相关条件下的控制器的设计;分析了采样周期抖动、估计Markov状态、多入多出系统和丢包等问题;提出研究网络控制系统的模型方法具有多样性,但其模型框架具有一致性.

This paper analyses systematically the effect and methods of compensation for delays in Networked Control Systems(NCS), discusses the design of the controller when the delays in NCS are less than or longer than one sampling period, constant or variable, random or determinate, independent or governed by Markov chain. And it also discusses the problem of sampling interval jitter, estimated Markov state, MIMO system and data packet dropout. This paper points out that the model method forstudying NCS is various, but the coherency of all these methods is worthy of discussing, such as the augmented state space method, to make the model become a close-looped system with coherent form.