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Title
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Linear and nonlinear damage detection using a scanning laser vibrometer
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Author
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Abstract
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| Because a Scanning Laser Vibrometer (SLV) can perform vibration measurements with a high spatial resolution, it is an ideal instrument to accurately locate damage in a structure. Unfortunately, the use of linear damage detection features, as for instance FRFs or modal parameters, does not always lead to a successful identification of the damage location. Measurement noise and nonlinear distortions can make the damage detection procedure difficult. In this article, a combined linear-nonlinear strategy to detect and locate damage in a structure with the aid of a SLV, will be proposed. To minimize the effect of noise, the modal parameters will be estimated using a Maximum Likelihood Estimator (MLE). Both noise and nonlinear distortion levels are extracted using the residuals of a two-dimensional spline fit. The validation of the technique will be performed on SLV measurements of a delaminated composite plate. |
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Language
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English
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Source (journal)
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Shock and vibration. - New York
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Source (book)
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4th International Conference on Vibration Measurements by Laser, Techniques, June 21-23, 2000, Ancona, Italy
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Publication
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New York
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Wiley-Interscience
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2002
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ISSN
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1070-9622
1875-9203
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DOI
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10.1155/2002/723561
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Volume/pages
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9
:1-2
(2002)
, p. 43-56
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ISI
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000174626500006
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Full text (Publisher's DOI)
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