Title :
Robust strict positive realness: new results for interval plant plus controller families
Author :
Vicino, A. ; Tesi, A.
Author_Institution :
Dipartimento di Ingegneria Elettrica, L´´Aquila Univ., Italy
Abstract :
A frequency domain approach is used to derive several robust strict positive results for interval plants and interval plant plus controller families of transfer functions. The approach, which is based on simple frequency domain properties of transfer functions, provides a framework for obtaining new results and constructing easy proofs of several existing important results on robust strict positive realness. The main new result states a necessary and sufficient condition for strict positive realness of an interval plant plus a controller family of transfer functions
Keywords :
control system analysis; frequency-domain analysis; stability; transfer functions; controller families; frequency domain approach; interval plant; necessary conditions; robust strict positive realness; sufficient condition; transfer functions; Control systems; Frequency domain analysis; Nonlinear filters; Polynomials; Robust control; Robust stability; Robustness; Stability analysis; Stability criteria; Sufficient conditions; Transfer functions;
Conference_Titel :
Decision and Control, 1991., Proceedings of the 30th IEEE Conference on
Conference_Location :
Brighton
Print_ISBN :
0-7803-0450-0
DOI :
10.1109/CDC.1991.261334
