Title :
QFT design for uncertain nonminimum phase and unstable plants
Author :
Chen, Wenhua ; Ballance, Donald J.
Author_Institution :
Centre for Syst. & Control, Glasgow Univ., UK
Abstract :
Design of robust controllers for uncertain nonminimum phase and unstable plants with quantitative feedback theory (QFT) is addressed. A counter example for a nonminimum phase plant is given to illustrate the errors in the Horowitz and Sidi method (1978). It is shown that the stability requirement of the new nominal plant is not clearly specified in the existing design method. The stability requirement for the new nominal plant is reformulated and improved design methods for nonminimum phase and/or unstable plants are presented
Keywords :
closed loop systems; control system synthesis; feedback; frequency-domain analysis; robust control; uncertain systems; closed loop systems; frequency domain; nonminimum phase systems; quantitative feedback theory; robust control; stability; uncertain systems; unstable systems; Aerospace control; Control systems; Design methodology; Feedback; Frequency domain analysis; Missiles; Robust control; Robust stability; Robustness; Uncertainty;
Conference_Titel :
American Control Conference, 1998. Proceedings of the 1998
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-4530-4
DOI :
10.1109/ACC.1998.703082
