Title
User-assisting tools for a fast frequency-domain modal parameter estimation method User-assisting tools for a fast frequency-domain modal parameter estimation method
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
London ,
Subject
Engineering sciences. Technology
Source (journal)
Mechanical systems and signal processing. - London
Volume/pages
18(2004) :4 , p. 759-780
ISSN
0888-3270
ISI
000221440200004
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Recently, the least-squares complex frequency-domain (LSCF) estimator has been developed for modal analysis applications. This contribution elaborates in more detail the fast derivation of stabilisation charts and uncertainty bounds for the estimated poles. An alternative representation for the stabilisation chart as well as a robust cluster algorithm to identify clusters of poles using the chart information is presented. Based on the clusters, uncertainty bounds for the poles and an automation of the pole selection process are derived. The relation of these "variances" with the stochastic variances (or confidence bounds) introduced by the noise on the measurements is compared by means of Monte-Carlo simulations. The use of alternative representation for the stabilisation chart in combination with the robust cluster analysis as well as the availability of uncertainty bounds for the modal parameters, assist the user with the performance of an accurate modal parameter estimation. (C) 2003 Elsevier Science Ltd. All rights reserved.
E-info
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