基于灵敏度的不稳定对象PID控制器  

PID tuning method for unstable processes based on sensitivity specification

作　　者：王亚刚[1] 许晓鸣[2] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]上海理工大学管理学院,上海200093

出　　处：《上海理工大学学报》2009年第2期125-128,共4页Journal of University of Shanghai For Science and Technology

基　　金：上海市自然科学基金资助项目(08ZR1415500);上海市科学技术委员会重点攻关计划项目(072305126)

摘　　要：针对不稳定对象提出了一种基于灵敏度指标的PID控制器整定方法.首先采用内环反馈结构将不稳定对象转换成一个稳定的模型,然后基于灵敏度指标设计PID控制器,最后通过将两个回路等价为一个反馈回路结构获得给定加权PID控制器参数.仿真结果表明,本PID控制器整定方法可以使不稳定对象闭环系统获得期望的灵敏度,保证了系统的鲁棒性和良好的控制性能.The method to tune PID controller was discussed for unstable processes with time delay to meet sensitivity specification. Two feedback loops design technique was adopted, and a tuning method for PID controller with setpoint weighting was provided, which can overcome structural limitation of the typical PID controller for unstable processes. With the proposed good method, a loop transfer function with desired sensitivity specification was obtained, which guarantees both robustness and good performance. Simulation examples were given to show the effectiveness of the proposed tuning method.

关 键 词：PID控制 不稳定对象 灵敏度 鲁棒性 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]