PID tuning for unstable processes based on gain and phase-margin specifications

被引：92
作者：
Ho, WK [1 ]
Xu, W [1 ]
机构：
[1] Natl Univ Singapore, Singapore 119260, Singapore
来源：
IEE PROCEEDINGS-CONTROL THEORY AND APPLICATIONS | 1998年 / 145卷 / 05期
关键词：
PID control; unstable processes;
D O I：
10.1049/ip-cta:19982243
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
PID control is widely used to control stable processes, however, PID control for unstable processes is less common. In the paper, simple formulas are derived to tune the PID controller for unstable processes to meet gain and phase margin specifications. The stability of the closed-loop system is ensured by the Nyquist stability criterion. These formulas are derived for first- and second-order processes with time delay. Simulation results are given to show the accuracy of the formulas and the performance that can be achieved.
引用
收藏
页码：392 / 396
页数：5
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