基于内模PID控制器的时延网络控制系统的保稳定性设计

Stability Design of Delay Network Control System Based on Internal Model Control-PID Controller

网络控制系统中存在的随机时延会导致系统的性能变差甚至不稳定。通过对随机时延的分析,建立了一个基于内模PID控制原理的网络控制系统模型,并以工业过程控制中经常用到的二阶对象为控制对象,完成了网络环境下的内模PID控制器的设计。仿真对比表明,该控制器对系统性能进行了补偿,保证了系统具有良好的稳定性能。

The performance of networked control systems becomes poor and unstable due to the stochastic delay.To solve the problem,the controller based on IMC-PID principle is designed for the second-order system.The controller guarantees the system＇s performances in stability and its robustness.The example illustrates the effectiveness of the controller.