灰靶理论在液压泵健康状态评估中的应用

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1、机床与液压0ct．2012HydromechatronicsEngineeringVo1．40No．19DOI：10．3969／j．issn．1001-3881．2012．19．015ApplicationofGreyTargetTheoryonHealthStatusAssessmentofHydraulicPumpZHANGSheng，JIANGWanlu，ZHUYong，LIULinaAbstract：HebeiProvinciaIKeyLaboratoryofHeavyMachineryFluidPowerTransmissi

2、onandContro1．EducationMinistryKeyLaboratoryofAdvancedForging&StampingTechnologyandScience，YanshanUniversity，Qinhuangdao066004，ChinaAccordingtotheincompleteinforma—tionduetotheimperfectiondetectionapproachesandinstabilityofsignalacquisitiondevice，thegreytargettheoryisint

3、roducedtoassessthehealthstatusforthehydraulicsystem．Firstly，thewaveletpacketanalysisandHilberttransformwereusedforsignalpreprocessing；secondly，thediferentseveritiesofthefaultswereanalyzed，andthenthedomaindimensionlessparametersweredecidedasfeatureMectorofthefaultsigna1．

4、Finally．thestandardfaultpa~ernwasbuiltandapproachingdegreewascalculatedtodeterminethefaultleve1．Theexperimentaldatashowthatthegreytargettheoryisanefe~ivemethodtoassessthehealthstatusforthehydraulicpump．Keywords：HydraulicPump，FaultDiagnosis，HealthStatusAssessment，GreyTar

5、getTheoryHydraulicpumpisthepowersourceofahydrau—theory—baseddiagnosticmethoddoesntneedtocreatelicsystem．Whetheritsworkingconditionishealthoraprecisemathematicalmode1．Transformandanaly—notwilldirectlyafecttheworkingstateofthewholesisoftheinputandoutputdataoftheresearchob

6、jecthydraulicsystem．Hence，theconditionmonitoringareonlyrequiredandthenthefeatureinformationareandfaultdiagnosisofthehydraulicpumpareveryextractedforthefaultdiagnosis．Thequantityoftheimportant．Thefaultmechanismofhydraulicpumpisfaultsampleisnotimportantandtheamountofcalcu

7、—complexandthedetectionmethodisimperfectduetolationiscomparativelysmal1．thatthefaultinformationiscollectedincompletely．Greytargettheoryisgreyrelevantanalysistheo-Therefore，thefaultmechanismofhydraulicpumpryforpatternseriesprocessing．Thebasicideaofthecanberegardedasagrey

8、system．Theknowninfor-greytargettheoryistofindoutthestandardpatterninmationisusedtospeculatethecharacteristicsa