Publication
Title
Fast variance calculation for polyreference least-squares frequency-domain estimates
Author
Abstract
One major drawback of the PolyMAX estimator, a polyreference least-squares frequency-domain estimator, is the lack of confidence bounds on the estimated modal parameters. This paper proposes a fast two-step approach to determine the variances on the estimated polynomial parameters and next on the resonance frequencies and damping ratios. The approach is based on the linearization of the sensitivity of the modal parameters to the noise variance. This noise variance (explicitly or as the coherence function) is assumed to be known a priori. The approach is tested on simulations and real-life measurements.
Language
English
Source (journal)
Mechanical systems and signal processing. - London
Publication
London : 2009
ISSN
0888-3270
Volume/pages
23:5(2009), p. 1423-1433
ISI
000265717700002
Full text (Publishers DOI)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 25.09.2013
Last edited 05.03.2017