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ID:39222506
大小:920.48 KB
页数:4页
时间:2019-06-27
《NON STATIONARY VIBRATION SIGNAL ANALYSIS OF ROTATING MACHINERY VIA》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、10thInternationalConferenceonInformationSCience,SignalProcessingandtheirApplications(ISSPA2010)NON-STATIONARYVIBRATIONSIGNALANALYSISOFROTATINGMACHINERYVIATIME-FREQUENCYANDWAVELETTECHNIQUESFadiAl-Badourl,L.Chedect,andM.Suna/[MechanicalEngineeringDepartment,2SystemsEngineeringDe
2、partment,KingFahdUniversityofPetroleum&MineralsKFUPM,31261,Dhahran,SaudiArabiaemail:fbadour@kfupm.edu.sa.cheded@kfupm.edu.sa.mehmets@kfupm.edu.sa.ABSTRACTtransformsusedarethecontinuouswavelettransform(CWT)andthediscretewavelettransform(DWT).ThestrengthoftheWaveletPacketTransfo
3、rm(WPT)hasnotbeenfullyexploitedinvibraThispaperintroducesanefficientandpowerfulapproachtofaulttionanalysis.Themajorcontributionofthispaperistoshowthedetectioninrotatingmachineryusingtime-frequencyanalysispoweroftheWPTinreliablyandeffectivelydetectingnonbasedonbothFourierandwav
4、elettransformsofthemonitoredstationarymechanicalfaults.vibrationsignal.Time-frequencytechniquesarepowerfultoolsforNon-stationarymechanicalsignalscouldbeclassifiedintotwoanalyzingtransientinformationinvibrationsignaturejorbothgroups:(a)Evolutionaryharmonicorfrequency-modulateds
5、ignal:conditionmonitoringandfaultdetectionpurposes.Ourworkonthesearegeneratedbysomeunderlyingperiodictime-varyingfaultdetectionreportedinthispaperistwo-fold:(l)applicationphenomenonlikeachangeinrotationalspeedduringmotorstartoftheshort-timeFouriertransforms(STFT)andtheexploita
6、tionuporshutdown.(b)Transientsignals:theseareshort-timeeventsofthespectrogram-basedtime-frequencydistributiontodetectwithanunpredictabletimebehaviourwhichgivesthemarandomvariousmechanicalfaultsduringthestart-up&coastdownphasnature.Examplesofthistypeofsignalsareimpactloading,ru
7、besinrotatingmachineryand(2)applicationofanovelwaveletbing,failureofageartoothandothers.basedtechniquecombiningboththecontinuouswaveletandtheThetestscarriedouttosimulatenon-stationarysignalsareexwaveletpackettransforms.Thisnoveltechniqueexploitstheuseplainednext:first,carryout
8、atheimportantfaststart-uptest,ofthemodulusofthelocalmaximalin
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