Title :
Comments on "A necessary and sufficient condition for stability of a perturbed system" by Q. Huang and R. Liu
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
It is pointed out that for a given controller, the sets of additive, multiplicative, and stable-factor perturbations that the plant can have without destabilizing the control system can be completely parametrized by using D.C. Youla´s parametrization and by noting that the roles that the plant and the controller play in a standard feedback control configuration can be reversed.<>
Keywords :
stability; feedback control; necessary and sufficient condition; perturbations; perturbed system; stability; Control system synthesis; Control systems; Feedback control; Optimal control; Stability; Sufficient conditions; Uncertainty;
Journal_Title :
Automatic Control, IEEE Transactions on
