A Space-frequency Data Compression Method For Spatially Dense Laser Doppler Vibrometer Measurements

dc.creatorDe Franca Arruda J.R.
dc.creatorAugusto S.
dc.creatorDo Rio V.
dc.creatorSilva L.A.
dc.creatorSantos B.
dc.date1996
dc.date2015-06-26T17:03:34Z
dc.date2015-11-26T14:19:03Z
dc.date2015-06-26T17:03:34Z
dc.date2015-11-26T14:19:03Z
dc.date.accessioned2018-03-28T21:20:26Z
dc.date.available2018-03-28T21:20:26Z
dc.identifier
dc.identifierShock And Vibration. , v. 3, n. 2, p. 127 - 133, 1996.
dc.identifier10709622
dc.identifier
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0001488558&partnerID=40&md5=c395ff77875f9df9f7d33c6875aaad2e
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/95605
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/95605
dc.identifier2-s2.0-0001488558
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1243820
dc.descriptionWhen spatially dense mobility shapes are measured with scanning laser Doppler vibrometers, it is often impractical to use phase-separation modal parameter estimation methods due to the excessive number of highly coupled modes and to the prohibitive computational cost of processing huge amounts of data. To deal with this problem, a data compression method using Chebychev polynomial approximation in the frequency domain and two-dimensional discrete Fourier series approximation in the spatial domain, is proposed in this article. The proposed space-frequency regressive approach was implemented and verified using a numerical simulation of a free-free-free-free suspended rectangular aluminum plate. To make the simulation more realistic, the mobility shapes were synthesized by modal superposition using mode shapes obtained experimentally with a scanning laser Doppler vibrometer. A reduced and smoothed model, which takes advantage of the sinusoidal spatial pattern of structural mobility shapes and the polynomial frequency-domain pattern of the mobility shapes, is obtained. From the reduced model, smoothed curves with any desired frequency and spatial resolution can be produced whenever necessary. The procedure can be used either to generate nonmodal models or to compress the measured data prior to modal parameter extraction. © 1996 John Wiley & Sons, Inc.
dc.description3
dc.description2
dc.description127
dc.description133
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dc.languageen
dc.publisher
dc.relationShock and Vibration
dc.rightsfechado
dc.sourceScopus
dc.titleA Space-frequency Data Compression Method For Spatially Dense Laser Doppler Vibrometer Measurements
dc.typeArtículos de revistas


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