二阶时滞系统内模PID控制的研究  

The research based on the time-delay approximations in IMC-PID control

作　　者：靳其兵[1] 刘明鑫[1] 龙萍[2] 

机构地区：[1]北京化工大学信息学院,北京100029 [2]中国石油股份有限公司西南油气田分公司川中油气开发科,四川遂宁629000

出　　处：《工业仪表与自动化装置》2009年第5期10-13,共4页Industrial Instrumentation & Automation

基　　金：国家863计划资助项目(2008AA042131);国家973计划资助项目(2007CB714300)

摘　　要：对于二阶时滞系统的内模控制,传统处理方法是对时滞的部分采用传统Pade逼近,这种方法容易引入零点使低阶对象在逼近的起始部分出现波动。该文采用一种新的全极点逼近法,设计基于内模原理的PID反馈控制,只需调整一个参数。并对二阶对象的时滞部分采用全极点和传统Pade逼近仿真实验。仿真结果表明:所采用的方法近似程度高,在IMC-PID转化后,仍然可以得到很好的控制效果。For IMC control in the time - delay system of second - order object, the traditional approach to delay is using the first - order Pade approximation, the second - order symmetrical Pade approximation or second -order nonsymmetrical Pade approximation, because the approximations are easy to introduce the zero point in low - order object approaching jitter at the beginning, and there are some errors. This paper using a new method of approaching the all - pole approximation, designing based on IMC - PID control just need adjusting one parameter. Comparing the all - pole and traditional Pade approximations instead of the time delay part of the second - order object. The simulation results show that the approximation of this new method is better than the traditional. By transforming IMC into PID, it gains the better control effect and strong robustness.

关 键 词：内模控制 Pade近似 全极点逼近 

分 类 号：TP271[自动化与计算机技术—检测技术与自动化装置]