Title :
From PI to H∞ control in a unified framework
Author :
Kristiansson, Birgitta ; Lennartson, Bengt ; Fransson, Carl-Magnus
Author_Institution :
Dept. of Electr. & Comput. Eng., Chalmers Lindholmen, Goteborg, Sweden
Abstract :
Based on a recently presented evaluation method, tuning rules are introduced and compared for a series of PID related controllers. For all of them, the integral gain and the high-frequency gain (the parameters in a PI controller), are used as the main tuning parameters. As these directly correspond to well known properties of a control system, they are easy to handle for an operator. It is also shown that a well-tuned PID controller augmented by a low-pass filter, to increase the roll-off rate, is quite competitive to a PLD weighted H∞ controller, and superior to the common PI weighted H∞ controller
Keywords :
H∞ control; control system synthesis; filtering theory; low-pass filters; three-term control; two-term control; H∞ control; PI control; PID related controllers; high-frequency gain; integral gain; low-pass filter; roll-off rate; tuning rules; unified framework; well-tuned PID controller; Automatic control; Control systems; Filters; Frequency; Robust control; Robustness; Shape control; Three-term control; Tuning; Weight control;
Conference_Titel :
Decision and Control, 2000. Proceedings of the 39th IEEE Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6638-7
DOI :
10.1109/CDC.2000.914220
