基于小波理论和混沌理论的轴承故障信号判别-论文.pdf

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1、机床与液压Sep．2013HydromechatronicsEngineeringVoI．41No．18DOI：10．3969／j．issn．1001-3881．2013．18．013DetectionofBearingFaultSignalBasedontheWaveletandChaosTheoryRENXueping，LIUTongtongMechanwalEngineeringSchool，InnerMongoliaUniversityofScience&Technology，Baotou014010，ChinaAbstract：B

2、asedontheknowledgeofwaveletpacketandchaostheory，anewapproachispro-posedtodeterminethebearingfaultsigna1．Throughalargenumberofnumericalsimulationtests，ithasbeenshownthattheproposedmethodisverygoodfortherealindustrialapplica-tions．Anexampleofthedetectionofbearingouterringfau

3、ltsignalwasconductedinthispaper，andtheresultshaveshownthatthismethodiscapabletodetectthefaultofbearing．Therefore．ithasbeenconfirmedthattheproposedmethodisanaccurateandefectivewaytodetectthebearingfaultsigna1．Keywords：waveletpacketde-noising，dufingoscillator，bearingfault，si

4、gnaldetectionnoiseisveryimportantforthesignalprocessingand1．Introductionfaultdiagnosis[1]．Bearingisoneofthemostcommonpartsinme—2．Thebasictheorychanicalequipmentsandtherunningstatedirectlyaf-fectsthefunctionoftheequipment．Sincethepreci—2．1．waveletpacketde-noisingsionofmoder

5、nmechanicalequipmentisgettinghigh—Thesignalscollectedattheworkplacearealsoerandhigher，anyslightfaultordisturbancemaythemixtureofothersignals．Italwayscontainssomecauseagreaterrortotheproductanditwillbringbandwidthofthesignals．IftheDufingoscillatorishugeeconomiclosses．Detect

6、ionofthefaultbearingdirectlyadoptedtoprocesstheoriginalsignal，itwillatthefirsttimeisanimportantwaytoimprovethenotonlywastealotofprocessingtime，butalsowillqualityofproducts．Therefore，itisnecessarytofindaffecttheaccuracy．Therefore．itisnecessarytode．aneffectivemethodtojudgeth

7、efailureofbearings．noisetheoriginalsignalsbeforethesesignalsareana-Duringthepracticalapplicationprocessofme—lyzed．Theconventionalwaytodenoisethesignalschanicalequipment，thecharacteristicsignalofbear．canonlygiveusagivenfrequencyofthesignalwhichingfailureisveryweakatthebegin

8、ningtimeofbear—maynotwhatwewant．However，ifthewaveletingfailureduetothecomplexityofequipme