基于内模控制的Smith反向解耦控制器设计

针对多变量时滞系统提出了一种基于内模控制(Internal Model Control,IMC)的Smith动态解耦控制器设计方法。其中,Smith补偿器被应用在该控制结构中,包含带有时滞项和不带时滞项的补偿结构,以解决不能完全补偿的问题,通过反向解耦设计实现多变量时滞系统动态解耦。多变量系统被解耦成一系列互相独立的单回路对象,通过内模控制原理对Smith控制器进行参数整定,并分析了系统的鲁棒性。仿真实例表明了该方法的有效性,能够较好地克服系统参数扰动导致的干扰,并具有较好的动态性能。

S mith Inverted Decoupling Controller Design Based on Internal Model Control

The design of dynamic Smith decoupling controller based on internal model control (IMC)was pro-posed for the multivariable system with time-delays,in which,Smith compensator with and without the delay terms was employed for the control scheme and to solve incomplete compensation;and through the reverse de-coupling design,the dynamic decoupling of the multivariable system with time-delays can be realized.Having the multivariable system decomposed into a set of mutually independent single loops and having IMC theory based to set parameters of Smith controller were implemented,including analysis of system robustness.Simula-tion examples demonstrate the effectiveness of the proposed approach,and it can eliminate the disturbance bet-ter incurred by the system parameter perturbation together with better dynamic property.