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1、MechanicalSystemsandSignalProcessing25(2011)1321–1338ContentslistsavailableatScienceDirectMechanicalSystemsandSignalProcessingjournalhomepage:www.elsevier.com/locate/jnlabr/ymsspOPAX:Anewtransferpathanalysismethodbasedonparametricloadmodelsa,nbaaaKarlJanssens,PeterGajdatsy,LudoGielen,PeterMas
2、,LaurentBritte,baWimDesmet,HermanVanderAuweraeraLMSInternationalNV,Interleuvenlaan68,B-3001Leuven,BelgiumbK.U.Leuven,DepartmentofMechanicalEngineering,Celestijnenlaan300B,3001Leuven,BelgiumarticleinfoabstractArticlehistory:Sinceitsfirstpublicationinthebeginningofthe1980s,transferpathanalysis(T
3、PA)hasReceived25May2010evolvedintoawidelyusedtoolfornoiseandvibrationtroubleshootingandinternalloadReceivedinrevisedformestimation,forsinglesourceandmultivariateproblems.Oneofthemainbottlenecks19October2010preventingitsevenmorewidespreaduseinthevehicledevelopmentprocessisthetestAccepted24Octo
4、ber2010timeneededtobuildthefulldatamodel,requiringnotonlyin-operationtestsbutalsoAvailableonline3November2010extensivefrequencyresponsefunction(FRF)measurements.Keywords:Asaconsequence,severalnewapproaches,suchasoperationalTPA,haveappearedoverOperationaltransferpathanalysisthepastyearsattempt
5、ingtocircumventthislimitation.ThesemethodsattractquitesomeForceestimationattentionastheyonlyrequireoperationaldatameasuredatthepathreferencesandtargetOPAXlocations.However,despitebeingtime-efficient,thesemethodssufferfromseverallimitationsMountstiffnessthatcanleadtoincorrectpathcontributionint
6、erpretationsandwrongengineeringdecisions.Hence,anewTPAapproachisproposed,providingagoodcompromisebetweenpathaccuracyandmeasurementtime.ThemethodisreferredtoasOPAXasitessentiallyusesin-operationdatacomplementedwithaminimalsetofextratestswithforcedexcitation.ThekeyideaofOPAXistheuseofparametric
7、modelsforidentifyingtheoperationalloads.Thismakesthemethodscalable,enablingtheengineertouseasimplemodelbasedonasmallamountofmeasurementdataforquicktroubleshootingorincreaseaccuracyusingamorecomplexmodeltogetherwithadditionalmeasurements.&2010
