Guaranteed robust control of unstable systems by using approximated models

Author

Fortuna, L. ; Gallo, A. ; Muscato, G. ; Nunnari, G.

Author_Institution

Dipartimento Elettrico, Elettronico e Sistemistico, Catania Univ., Italy

fYear

1992

fDate

17-19 Sep 1992

Firstpage

424

Lastpage

427

Abstract

Some preliminary results regarding the design of low-order compensators for unstable plants are presented. With the proposed approach it is possible to compute the compensator which robustly stabilizes a given unstable plant, after approximating the system with a reduced-order model whose only constraint is retaining the same number of unstable poles as the original one. The conditions for obtaining a low order uncertainty function are also given. The solution to the problem can be obtained by using a min-max approximation approach. The proposed strategy is illustrated by a numerical example

Keywords

compensation; control system synthesis; function approximation; poles and zeros; stability; approximated models; constraint; guaranteed robust control; low order uncertainty function; low-order compensators; min-max approximation; reduced-order model; stability; unstable poles; unstable systems; Asymptotic stability; Control systems; Interpolation; Open loop systems; Regulators; Robust control; Robustness; Transfer functions; Uncertainty; Upper bound;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems Engineering, 1992., IEEE International Conference on

Conference_Location

Kobe

Print_ISBN

0-7803-0734-8

Type

conf

DOI

10.1109/ICSYSE.1992.236997

Filename

236997