基于混合编程和结合特征提取方法的转辙机故障诊断系统开发.pdf

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1、机床与液压Mar．2014HydromechatronicsEngineeringVol_42No．6DOI：10．3969／j．issn．1001-3881．2014．06．012Developmentofdiagnosissystembasedonmixedprogrammingann1cornlDi●ned1ext·raeu·-onmet·h_od't^orSWl■t』Cn1maCn●l●neMo-hanLEI，PingYANGSchoolofMechanicalEngineering，LanzhouUniversityofTechnology

2、，Lanzhou730050，ChinaAbstract：AccordingtotheproblemsexistinginenvelopefeatureextractingmethodsthatwerebasedonWaveletPacketTransform(WPT)OrEmpiricalModeDecomposition(EMD)，thispa-peradoptssignaldecompositionmethodofEMDandWPTcombinationinfeatureextracting．Thisdecompositionmethodcan

3、notonlyprovidehighresolution，butalsoavoiderrormessagescausedbyfalseIntrinsicModeFunctions(1MF)components．AfterthecombinationofenvelopefeaturesareextractedusingEMDandWPTmethod．themostefectivecharacteristicsofdefec-tedsignalswilIbeselectedandclassifiedusingthedatafeatureselecting

4、methodbasedonPrin-cipaIComponentsAnalysisfPCA1．Basedontheabovefeaturesextractingandselectionmeth—ods，thispaperusesmixedprogrammingofLabviewandMatlabtodevelopadiagnosissystemforS700K-Celectricalswitchmachine．andthediagnostictestingexperimentintheendprovesthatthisdiagnosissystemc

5、anextractdefectedsignalsaccuratelyandrapidly．Keywords：Switchmachine，Labview，EMD，WPT，Matlabtouse，thediagnosissystemneedsafriendlyinter-1．Introductionface，thefunctionsofgraphicaldisplayandpowerfuldataprocessingandanalyzingability[1]．S700K．Celectricalswitchmachinewasdevel—Fornon--

6、stationaryandnon·-linearultrasonicsig-·opedtomeetthedemandoftheaccelerationofChi·nalsinpracticalapplications．theWPTmethodofneserailway．Withtheincreasingspeedanddensitysignalssamplingdecomposingcannotalwayssatisfyoftrainstopassthroughturnoutsandtheadoptingofthedemandofhighresolu

7、tioninthetimeandfre．heavyhaultrainandheavyrailwayturnouts，workingquencydomain，andtheEMDmethodoforiginalsig-environmentofswitchmachinesisalsochanging．Innalssamplinganalyzingalwaysproducesfalseintrin-ordertoensurethesafetyofrunningtrains，thevitalsicmodefunction(IMF)componentwhich

8、lcadstopartsofswitchmachinesdemandhigherstandardofwron