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Robust rational approximation for identification

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4 Author(s)
A. Bultheel ; Dept. of Comput. Sci., Katholieke Univ., Leuven, Belgium ; M. Van Barel ; Y. Rolain ; J. Schoukens

Using vector orthogonal polynomials as basis functions for the maximum-likelihood (ML) frequency domain identification of the rational form of a linear time invariant system is shown to circumvent all the well known numerical conditioning problems. For identification of very high order systems (e.g. 100/100), systems that operate over a wide frequency band, or even in the presence of over- and undermodelling, condition numbers of less than 10 are reported on real measurements and simulation

Published in:

Decision and Control, 2001. Proceedings of the 40th IEEE Conference on  (Volume:5 )

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