近似变换大纯滞后的过程最优控制  

PROCESS OPTIMAL CONTROL OF APPROXIMATE CONVERSION LARGE TIME-DELAY

作　　者：贺庆之[1] 李茜[1] 汤伟[2] 陈玉东[2] 

机构地区：[1]西北轻工业学院自控系,陕西咸阳712081 [2]上海交通大学自动化研究所,上海200030

出　　处：《西北轻工业学院学报》2001年第2期74-78,共5页Journal of Northwest University of Light Industry

摘　　要：结合一个特大纯滞后的温控系统 ,探讨用 PADE近似描述特大纯滞后 ,获得被控对象不带指数函数的有理多项式传递函数模型 ,实现泛函条件极值的求解 ,再根据军事用途的最优控制与工业控制之间描述方法的区别 ,对最优控制系统进行改造 ,获得一个特大纯滞后的温度最优控制系统 ;用 MATLAB理工算法语言对此系统进行仿真 ,获得它的动态性能指标、稳定性与鲁棒性 ,说明How using optimal control to the process control systems of industry, a novel method for designing optimal controller based on PADE approximation is proposed for industrial processes with large time delay. Its basic principle is : approximating the pure time delay term in the process by PADE expansion, transforming it into discrete state space, appending white noise, obtaining the optimal control rule by minimizing the quadratic criterion function. The simulation result of temperature control system indicates that the optimal controller designed in the paper has good time domain performance, strong disturbance rejection and good robustness.

关 键 词：最优控制 大纯滞后系统 MATLAB语言 稳定性 鲁棒性 

分 类 号：TP273.1[自动化与计算机技术—检测技术与自动化装置]