Model updating using robust estimation

C Mares, MI Friswell, JE Mottershead

Research output: Contribution to journalArticle (Academic Journal)peer-review

43 Citations (Scopus)

Abstract

Model updating attempts to correct errors in a finite element model using measured data. However, the measurements are corrupted with noise and the finite element model contains errors. Most updating schemes try to find the best model in some mean sense. This paper takes a different view and uses robust estimation techniques to determine the most robust parameter set. This parameter set is optimum in that the residuals are as small as can be, for a range of bounded uncertainties on the model and measurements. The relationship between this robust identification and Tikhonov regularisation is explored. The use of the 'L' curve method and expected parameter uncertainty to determine the regularisation parameter are shown. The approach is demonstrated using a simulated cantilever beam example, and experimental data from the GARTEUR test structure.
Translated title of the contributionModel updating using robust estimation
Original languageEnglish
Pages (from-to)169 - 183
Number of pages15
JournalMechanical Systems and Signal Processing
Volume16(1)
DOIs
Publication statusPublished - Jan 2002

Bibliographical note

Publisher: Elsevier Science Ltd

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