确定和不确定时延的NCS稳定性研究

Researches into the NCS Stability of Certain and Uncertain Time-delay

在网络控制系统(NCS)的分析和设计中,影响系统稳定性和系统性能变差的因素之一是时延.在讨论了离散NCS模拟建模基础上,介绍了一类确定短时延的NCS稳定性,针对一类存在不确定时延的网络控制系统,给出了满足NCS闭环系统渐进稳定的一个条件,并得到一个推论.并通过Matlab的LMI工具箱给予了验证.

In the analysis and design of NCS, time - delay is one of the factors that intluence the stability and performance of the system. Based on the discussion of simulating modeling through dispersing NEC, this article introduces the stability of NCS of confirming short time delay, gives a condition which makes NCS closed circulating system go steady for a NCS in which uncertain time delay exists, and reaches a conclusion about it. The conclusion has been proved by LMI tool box of Matlab.