改善时滞系统解耦性能的研究

A Study on Improving Decoupling Performance for System with Time Delays

时滞系统在工业过程中是极其普遍的,由于其特殊性, 控制系统的常规设计并不能取得良好的闭环性能。对于SISO时滞系统,Smith补偿器曾得到广泛的重视和研究。对于MIMO时滞系统,通过增加时滞环节可以改善系统解耦特性已给出了理论结果。本文试图通过理论分析给出一系统化的方法,以便确定增加适当的时滞环节,从而改善系统的解耦特性。文中还用一个热交换网络系统为例说明该方法的有效性。

This paper is addressed to develop a modified method, based on the results of Holt & Morari(1985) and Jerome & Ray(l986),in order to add time delays suitably to original systems and make the final decoupled systems with better dynamic performance.In this paper,an example of heat exchanger network shows that the method developed is helpful to analyze the system and improve the operation performance.