针对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：HebeiProvinciaIKeyLaboratoryofHeavyMachineryFluidPowerTransmissionandC

2、ontro1．EducationMinistryKeyLaboratoryofAdvancedForging&StampingTechnologyandScience，YanshanUniversity，Qinhuangdao066004，ChinaAccordingtotheincompleteinforma—tionduetotheimperfectiondetectionapproachesandinstabilityofsignalacquisitiondevice，thegreytargettheoryisintroducedtoass

3、essthehealthstatusforthehydraulicsystem．Firstly，thewaveletpacketanalysisandHilberttransformwereusedforsignalpreprocessing；secondly，thediferentseveritiesofthefaultswereanalyzed，andthenthedomaindimensionlessparametersweredecidedasfeatureMectorofthefaultsigna1．Finally．thestandar

4、dfaultpa~ernwasbuiltandapproachingdegreewascalculatedtodeterminethefaultleve1．Theexperimentaldatashowthatthegreytargettheoryisanefe~ivemethodtoassessthehealthstatusforthehydraulicpump．Keywords：HydraulicPump，FaultDiagnosis，HealthStatusAssessment，GreyTargetTheoryHydraulicpumpis

5、thepowersourceofahydrau—theory—baseddiagnosticmethoddoesntneedtocreatelicsystem．Whetheritsworkingconditionishealthoraprecisemathematicalmode1．Transformandanaly—notwilldirectlyafecttheworkingstateofthewholesisoftheinputandoutputdataoftheresearchobjecthydraulicsystem．Hence，thec

6、onditionmonitoringareonlyrequiredandthenthefeatureinformationareandfaultdiagnosisofthehydraulicpumpareveryextractedforthefaultdiagnosis．Thequantityoftheimportant．Thefaultmechanismofhydraulicpumpisfaultsampleisnotimportantandtheamountofcalcu—complexandthedetectionmethodisimper

7、fectduetolationiscomparativelysmal1．thatthefaultinformationiscollectedincompletely．Greytargettheoryisgreyrelevantanalysistheo-Therefore，thefaultmechanismofhydraulicpumpryforpatternseriesprocessing．Thebasicideaofthecanberegardedasagreysystem．Theknowninfor-greytargettheoryistof

8、indoutthestandardpatterninmationisusedtospeculatethecharacteristicsa