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Guaranteed robust control of unstable systems by using approximated models

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4 Author(s)
Fortuna, L. ; Dipartimento Elettrico, Elettronico e Sistemistico, Catania Univ., Italy ; Gallo, A. ; Muscato, G. ; Nunnari, G.

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

Published in:

Systems Engineering, 1992., IEEE International Conference on

Date of Conference:

17-19 Sep 1992