Show simple item record

dc.contributor.author
 hal.structure.identifier
GALLO, Maxime
31116 Laboratoire Vibrations Acoustique [LVA]
dc.contributor.author
 hal.structure.identifier
EGE, Kerem
31116 Laboratoire Vibrations Acoustique [LVA]
dc.contributor.author
 hal.structure.identifier
REBILLAT, Marc
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
dc.contributor.author
 hal.structure.identifier
ANTONI, Jérôme
31116 Laboratoire Vibrations Acoustique [LVA]
dc.date.accessioned2015
dc.date.available2015
dc.date.issued2015
dc.date.submitted2015
dc.identifier.urihttp://hdl.handle.net/10985/10288
dc.description.abstractWeak non-linearities in vibrating structures can be characterized by a signal-model approach based on cascade of Hammerstein models. The experiment consists in exciting a device with a sine sweep at different levels, in order to assess the evolutions of non linearities on a wide frequency range. A method developed previously, based on exponential sine sweep, is able to give an approximative identification of the Hammerstein models, but cannot make the distinction between nonlinear distortion and stationary plant noise. Therefore, this paper proposes improvements on the method that provide a more precise estimation of the Hammerstein models through the cancellation of the plant noise: it relies on the repetition of the signal on a certain amount of periods (multi-sine sweeps) and then on the consideration of the synchronous average out of the different periods from the resulting signal. Mathematical foundations and practical implementation of the method are discussed. The second main point of improvement concerning the study of the vibrating device is the use of the Bootstrap analysis. By considering some periods randomly chosen among the multisine sweep, one can study the variability of the experiments. The method becomes more robust.
dc.language.isoen
dc.rightsPost-print
dc.subjectNonlinear model estimation
dc.subjectParallel Hammerstein models
dc.subjectVibrations
dc.subjectThin plates
dc.titleA multi-sine sweep method for the characterization of weak non-linearities ; plant noise and variability estimation.
dc.typdocCommunication avec acte
dc.localisationCentre de Paris
dc.subject.halInformatique: Traitement du signal et de l'image
dc.subject.halSciences de l'ingénieur: Acoustique
dc.subject.halSciences de l'ingénieur: Mécanique: Vibrations
ensam.audienceInternationale
ensam.conference.titleNOVEM 2015 _ Noise and Vibration - Emerging Technologies
ensam.conference.date2015-04-13
ensam.countryCroatie
ensam.title.proceedingNoise and Vibration - Emerging Technologies
ensam.page1-8
ensam.issue48798
ensam.cityDubrovnik
hal.identifierhal-01219128
hal.version1
hal.submission.permittedupdateMetadata
hal.statusaccept


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record