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Impact Excitation Processing for Improved Frequency Response Quality
University of Southern Denmark, Denmark.ORCID iD: 0000-0003-2025-7842
University of Southern Denmark, Denmark.
2010 (English)In: Structural Dynamics, Volume 3: Proceedings of the 28th IMAC, A Conference on Structural Dynamics, 2010 / [ed] Tom Proulx, Springer, 2010, Vol. 3, 89-95 p.Conference paper, Published paper (Refereed)
Abstract [en]

Impact excitation is the most common excitation type for measurements of frequency response functions for modal analysis and other purposes. The method used is almost always based on setting the data acquisition system up with triggering, fixed FFT analysis settings, and then using an accept/reject step where each impact is either accepted if the impact seems good, or rejected if it contained some error such as double impacts or overload. This method has several drawbacks that often lead to non-optimal frequency responses. In this paper, an improved method based on time recording of all signals and subsequent post processing is proposed. The data acquisition part is made easier with the proposed method, while at the same time the importance of a skilled operator is reduced. It is shown on a real test structure that the quality of the resulting frequency responses can be significantly improved (measured by the coherence function) compared to the traditional method, and at the same time the total acquisition time can be shortened. An automatic optimization procedure which allows for fully automated post processing is proposed.

Place, publisher, year, edition, pages
Springer, 2010. Vol. 3, 89-95 p.
Series
Conference Proceedings of the Society for Experimental Mechanics Series, ISSN 2191-5644
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-56926DOI: 10.1007/978-1-4419-9834-7_9ISBN: 9781441998330 (print)ISBN: 9781441998347 (print)OAI: oai:DiVA.org:lnu-56926DiVA: diva2:1040111
Conference
28th International Modal Analysis Conference (IMAC), Jacksonville, USA, February 1-4, 2010
Available from: 2016-10-26 Created: 2016-09-28 Last updated: 2016-10-26Bibliographically approved

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Brandt, Anders
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CiteExportLink to record
Permanent link

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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