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Effects of simultaneous versus roving sensors measurement in operational modal analysis
University of Southern Denmark, Denmark.
University of Southern Denmark, Denmark.ORCID iD: 0000-0003-2025-7842
2014 (English)In: 26th International Conference on Noise and Vibration Engineering (ISMA 2014): Proceedings of a meeting held 15-17 September 2014, Leuven, Belgium. Held in Conjunction with the 5th International Conference on Uncertainty in Structural Dynamics (USD 2014) / [ed] P. Sas, H. Denayer & D. Moens, Leuven: Katholieke Universiteit Leuven, Department of Mechanical Engineering , 2014, 3269-3280 p.Conference paper, Published paper (Refereed)
Abstract [en]

For operational modal analysis (OMA) comparisons of simultaneous measurements versus roving sensor (or multi-setup) measurements have rarely been reported. The present paper presents experimental results from an OMA obtained from a measurement consisting of 45 sensors simultaneously measured on a ship in operation. The modal parameters are estimated and compared for the full dataset, and three artificial roving tests based on the full dataset using a multi-reference Ibrahim time domain algorithm. The first test is composed of five datasets that are parallel in time, hence consistency between the datasets is guaranteed. The second test is also parallel in time but with two datasets, and the third test is composed of the same two datasets, but serial in time, hence consistency between the datasets is not guaranteed. It is shown that using a measurement strategy with roving sensors can result in similar global modal parameters as those obtained using the full dataset. The variance in the damping ratio estimates, however, is considerably larger when roving tests are used.

Place, publisher, year, edition, pages
Leuven: Katholieke Universiteit Leuven, Department of Mechanical Engineering , 2014. 3269-3280 p.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-56964OAI: oai:DiVA.org:lnu-56964DiVA: diva2:1039870
Conference
26th International Conference on Noise and Vibration Engineering (ISMA 2014, Leuven, Belgium, September 15-17, 2014
Available from: 2016-10-25 Created: 2016-09-28 Last updated: 2016-10-25Bibliographically approved

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Brandt, Anders
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • de-DE
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  • en-US
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  • sv-SE
  • Other locale
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