变论域模糊和Smith预估的免疫PID控制研究

On Immune PID Control Based on Variable Region Fuzzy and Smith-Predictor

针对具有时变、纯滞后的非线性系统,结合变论域自调整模糊和Smith预估控制方法,提出了一种新的基于变论域模糊和Smith预估的免疫PID控制器。通过改变模糊输入和输出变量的论域,使论域自调整模糊控制器用较少的控制规则实现了较高精度的控制,同时使用预估器预先估计出过程在基本扰动下的动态特性,使调节器提前动作,从而明显地减少超调量。Matlab仿真表明所设计的控制系统在稳定性、准确性方面优于免疫PID控制器。

Based on the variable region self-adjustment fuzzy and Smith-predictor,the paper suggests a new im-mune PID control based on the variable region fuzzy and Smith-predictor to the treatment of the nonlinear system characteristic of the time change and delay.The change of the domain of the fuzzy input and output variables helps the region self-adjustment fuzzy controller realize the high precision control through the less control regu-lations,and the dynamic features in the normal interruptions is also estimated by the predictor,so that the adjus-tor will take action in advance to obviously limit the overshoot.The simulations by MATLAB demonstrate that the control system is superior to that of the immune PID in stability and accuracy.