基于改进滤波器的非方时滞过程解耦控制

摘要

A modified decoupling control method is proposed to weaken internal coupling and reject external input/output disturb‐ances for multivariable non‐square system with time delays .Firstly ,a decoupling method is presented based on singular value de‐composition .Then ,a centralized PI controller is designed by combining the Smith predictor structure and the internal model con‐trol principle .The feedback filters are modified to improve the performance for disturbance rejection ,based on the slow poles . Finally ,simulation results demonstrate the effectiveness of the proposed method .%为解决非方时滞系统中耦合和外界输入输出扰动的影响，提出了一种改进的解耦控制方法。首先根据奇异值分解理论对系统进行解耦，结合Smith预估结构并利用内模控制原理设计集中式PI控制器。然后根据过程中的慢动态极点设计改进的反馈滤波器，以加快系统对输入和输出干扰的抑制。仿真实例验证了所设计方法的有效性。