DocumentCode :
1495454
Title :
Discrete-time model reduction with optimal zero locations by norm minimisation
Author :
Sebakhy, O.A. ; Aly, M.N.
Author_Institution :
Dept. of Electr. Eng., Alexandria Univ., Egypt
Volume :
145
Issue :
6
fYear :
1998
fDate :
11/1/1998 12:00:00 AM
Firstpage :
499
Lastpage :
506
Abstract :
A hybrid approach is used to design reduced-order discrete time models. The reduced-order model denominator is fixed either by choosing its roots to be those nearest to the unit circle (i.e., the dominant poles of the original model), or by any other method. Then, the numerator zeros are chosen optimally so that certain norms on the approximation error are minimised, while at the same time satisfying some linear constraints. Several norms are used (l2, l and l1), and the optimal solution is computed for each case. Two examples illustrate the efficiency of the proposed methods
Keywords :
H optimisation; discrete time systems; minimisation; reduced order systems; zero assignment; approximation error norm minimisation; discrete-time model reduction; dominant poles; linear constraints; numerator zeros; optimal zero locations; reduced-order discrete time model design; reduced-order model denominator;
fLanguage :
English
Journal_Title :
Control Theory and Applications, IEE Proceedings -
Publisher :
iet
ISSN :
1350-2379
Type :
jour
DOI :
10.1049/ip-cta:19982400
Filename :
756359
Link To Document :
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