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On the use of flexural wave propagation experiments for identification of complex modulus
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. (Matematisk modellering)
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2003 (English)In: IEEE Transactions on Control Systems Technology, ISSN 1063-6536, E-ISSN 1558-0865, Vol. 11, no 6, 863-874 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate the nonparametric estimation of the frequency dependent complex modulus of a viscoelastic material. The strains due to flexural wave propagation in a bar specimen are registered at different cross sections. The time domain data is transformed into frequency domain using discrete Fourier transform and a nonlinear least squares algorithm is then employed to estimate the complex modulus at each frequency. Inherent numerical problems due to associated ill-conditioned matrices are treated with special care. An analysis of the quality of the nonlinear least squares estimate is also carried out. The validity of the theoretical results are confirmed by numerical studies and experimental tests

Place, publisher, year, edition, pages
IEEE , 2003. Vol. 11, no 6, 863-874 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
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URN: urn:nbn:se:kau:diva-22107DOI: 10.1109/TCST.2003.819589OAI: oai:DiVA.org:kau-22107DiVA: diva2:595783
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2013-10-22Bibliographically approved

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Mossberg, Magnus
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