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Generalized adaptive notch filters with frequency debiasing for tracking of polynomial phase systems

Abstract

Generalized adaptive notch filters are used for identification/tracking of quasi-periodically varying dynamic systems and can be considered an extension, to the system case, of classical adaptive notch filters. For general patterns of frequency variation the generalized adaptive notch filtering algorithms yield biased frequency estimates. We show that when system frequencies change slowly in a smooth way, the estimation bias can be substantially reduced by means of post-filtering of the frequency estimates. The modified (debiased) algorithm has better tracking capabilities than the original algorithm.

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Details

Category:
Articles
Type:
artykuł w czasopiśmie z listy filadelfijskiej
Published in:
AUTOMATICA no. 43, pages 128 - 134,
ISSN: 0005-1098
Language:
English
Publication year:
2007
Bibliographic description:
Niedźwiecki M., Sobociński A.: Generalized adaptive notch filters with frequency debiasing for tracking of polynomial phase systems// AUTOMATICA. -Vol. 43., (2007), s.128-134
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.automatica.2006.08.004
Verified by:
Gdańsk University of Technology

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