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A Pretest Planning Method for Model Calibration for Nonlinear Systems
Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
Linnaeus University, Faculty of Technology, Department of Mechanical Engineering. (Maskinteknik)ORCID iD: 0000-0002-4404-5708
Chalmers University of Technology.
University of the West of England, UK.
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2016 (English)In: Model Validation and Uncertainty Quantification, Volume 3: Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016, Springer, 2016, Vol. 3, 371-379 p.Conference paper, Published paper (Other academic)
Abstract [en]

With increasing demands on more flexible and lighter engineering structures, it has been more common to take nonlinearity into account. Model calibration is an important procedure for nonlinear analysis in structural dynamics with many industrial applications. Pretest planning plays a key role in the previously proposed calibration method for nonlinear systems, which is based on multi-harmonic excitation and an effective optimization routine. This paper aims to improve the pretest planning strategy for the proposed calibration method. In this study, the Fisher information matrix (FIM), which is calculated from the gradients with respect to the chosen parameters with unknown values, is used for determining the locations, frequency range, and the amplitudes of the excitations as well as the sensor placements. This pretest planning based model calibration method is validated by a structure with clearance nonlinearity. Synthetic test data is used to simulate the test procedure. Model calibration and K-fold cross validation are conducted for the optimum configurations selected from the pretest planning as well as three other configurations. The calibration and cross validation results show that a more accurate estimation of parameters can be obtained by using test data from the optimum configuration.

Place, publisher, year, edition, pages
Springer, 2016. Vol. 3, 371-379 p.
Series
Conference Proceedings of the Society for Experimental Mechanics Series, ISSN 2191-5644
Keyword [en]
Nonlinear model calibration, pretest planning, clearance, multi-harmonic excitation, Fisher information matrix
National Category
Other Mechanical Engineering
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-51449DOI: 10.1007/978-3-319-29754-5_36ISI: 000389798700036ISBN: 978-3-319-29753-8 (print)ISBN: 978-3-319-29754-5 (print)OAI: oai:DiVA.org:lnu-51449DiVA: diva2:914927
Conference
The 34th IMAC, Conference and Exposition on Structural Dynamics 2016
Available from: 2016-03-28 Created: 2016-03-28 Last updated: 2017-01-10Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf