 Wysłany: Nie 3:27, 08 Maj 2011 Temat postu: abercrombie en fitch Time-frequency decomposition |
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| Time-frequency decomposition based modal parameter identification
1. Useofcrosstimefrequencyestimatorsforstructuralidentificationinnon-stationaryconditionandunderunknownexcitation. JournalofSoundandVibration, 2000; 273 (5) :775-79114MorrisJM,oakley solbriller, LuYH. DiscreteGaborexpansionofdis-cretetimesignalsinZ (Z) viaframetheory. IEEETransactionsonSignalProcessing,imagenes ed hardy, 1994; 40:155-18115QianS. ChenDP. Jointtimefrequencyanalysis-meth-odsandapplication. PrenticeHallPTR. 1996ModalParameterIdentificationUsingSignalDecompositioninTime-FrequencyDomainZhangZhiyXuXiuzhongHuaHongxingHuangZhen (InstituteofVibration. ShockandNoise, ShanghaiJiaotongUniversityShanghai, 200030) AbstractAnewmethodconcerningmodalparameteridentificationoflineartimeinvariantsystemsispresentedinthispaper. InlightoftheGabortheoryofsignaldecomposition. responsesofamulti-degree-of-freedomsystemcanbedecomposedintouncoupledsignals. vibratingatasinglenaturalfrequency. Giventheseuncoupledsignals,abercrombie en fitch, parameterestimationcanbesubse-quentlyconductedwithcommonmethods. Comparedwithtraditionalmethods,Abercrombie and Fitch, theproposedapproachrequiresnoinputsignalexceptforresponsesignalsgeneratedbyunknownenvironmentalexcitationandnomatterwhetheritisstationaryornot. Inthesenseoflessrestrictiononthein-outsignals,Abercrombie Deutschland, theapproachbasedonsignaldecompositionintime-frequencydomainisverygenera1. Anumericalexampleofasimplysupportedbeamundernon-stationaryexcitationisalsopresentedtodemonstratetheeffectivenessoftheproposedmethod. Keywords: randomsignals; modalparameteridentification; signaldecomposition; Gaborexpansion male first author Yi Zhang , postdoctoral students March 1970 l1 . Phone : (021) 62810031; E-mail: chychangcn @ yahoo. corn 相关的主题文章： Óculos Oakley Legal issues in packaging design _43 oakley norge Packaging Design color application _4 louboutin københavn Based on magnetorheological da |
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