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GLCT_广义线性线调频小波转换_广义变换General linear chirplet transform.pdf

GLCT_广义线性线调频小波转换_广义变换General linear chirplet transform.pdf

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MechanicalSystemsandSignalProcessing70-71(2016)958–973

ContentslistsavailableatScienceDirect

MechanicalSystemsandSignalProcessing

journalhomepage:/locate/ymssp

Generallinearchirplettransform

GangYun,YiqiZhou

KeyLaboratoryofHigh-EfficiencyandCleanMechanicalManufacture,ShandongUniversity,Jinan250061,PRChina

articleinfoabstract

Articlehistory:Time–frequency(TF)analysis(TFA)methodisaneffectivetooltocharacterizethetime-

Received28April2015varyingfeatureofasignal,whichhasdrawnmanyattentionsinafairlylongperiod.With

ReceivedinrevisedformthedevelopmentofTFA,manyadvancedmethodsareproposed,whichcanprovidemore

24August2015preciseTFresults.However,somerestrictionsareintroducedinevitably.Inthispaper,we

Accepted1September2015

introduceanovelTFAmethod,termedasgenerallinearchirplettransform(GLCT),which

Availableonline26September2015

canovercomesomelimitationsexistedincurrentTFAmethods.Innumericaland

Keywords:experimentalvalidations,bycomparingwithcurrentTFAmethods,someadvantagesof

Time–frequencyanalysisGLCTaredemonstrated,whichconsistofwell-characterizingthesignalofmulti-compo-

Linearchirplettransform

nentwithdistinctnon-linearfeatures,beingindependenttothemathematicalmodeland

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