Title :
The choice of controller zeros
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
The positioning of the controller zeros near the slow process poles though greatly improving the speed of response for a set-point change, can be detrimental to load rejection. This result is used to explain the heuristics used in the Ziegler-Nichols tuning formula for proportional-integral-derivative controllers and in the positioning of controller zeros in pole-placement controllers and phase-lag compensators.<>
Keywords :
compensation; poles and zeros; three-term control; Ziegler-Nichols tuning formula; controller zeros; heuristics; load rejection; phase-lag compensators; pole-placement controllers; proportional-integral-derivative controllers; set-point change; slow process poles; three term control; zeros positioning; Design optimization; Documentation; Expert systems; PD control; Pi control; Poles and zeros; Proportional control; Three-term control; Transfer functions; Transient response;
Journal_Title :
Control Systems Magazine, IEEE
