A comparison of gain design criteria for closed-loop model updating

Lars Lynge Hansen, Thomas Akselsen, Ünal Korkmaz, Martin Dalgaard Ulriksen*

*Corresponding author

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

A conventional procedure for structural model updating is to solve an inverse problem with the aim of minimizing the discrepancy between an experimental target feature vector and a model-predicted one. The inverse problem to be solved is often ill-posed as the number of model parameters to be updated typically exceeds the number of target features. One way to confront this issue is to expand the target feature vector through closed-loop model updating, where gains are used to form multiple closed-loop eigenstructures from which target features are obtained. Besides confronting the ill-posedness of the inverse problem, the closed-loop model updating procedure also allows one to tailor the sensitivities of the target features by adequate design of the feedback gains. The present paper offers a comparative study in which the merit of different gain design criteria is examined for closed-loop sensitivity-based model updating. More specifically, the gains will be designed through eigenstructure assignment in an optimization setting where different cost functions, including the nuclear norm and the condition number of the sensitivity matrix, will be tested. Updating results will be shown for a numerical model of a shear building.
Original languageEnglish
Title of host publicationEURODYN 2020: XI International Conference on Structural Dynamics
Number of pages4638
Publication date2020
Pages4630
Publication statusPublished - 2020
EventEURODYN 2020: XI International Conference on Structural Dynamics - Greece, Athens, Greece
Duration: 22 Jun 202024 Jun 2020
https://eurodyn2020.org/

Conference

ConferenceEURODYN 2020: XI International Conference on Structural Dynamics
LocationGreece
CountryGreece
CityAthens
Period22/06/202024/06/2020
Internet address

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