外文翻译--磁流体对伺服阀力矩马达动态特性的影响 英文版.pdf外文翻译--磁流体对伺服阀力矩马达动态特性的影响 英文版.pdf

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MECHANICALSYSTEMSANDSIGNALPROCESSINGMECHANICALSYSTEMSANDSIGNALPROCESSING2220081008–1015ABSTRACTARTICLEINPRESSWWWELSEVIERCOM/LOCATE/JNLABR/YMSSP08883270/SEEFRONTMATTERR2007ELSEVIERLTDALLRIGHTSRESERVEDDOI101016/JYMSSP200709016C3CORRESPONDINGAUTHORTEL/FAX8645186418318EMAILADDRESSESLISONGJINGHITEDUCNSLI,BAOWENHITEDUCNWBAOASMAGNETICFLUIDSSHOWHIGHERSATURATIONMAGNETIZATIONSWHENTHEYAREEXPOSEDTOMAGNETICFIELDS,THEYAREWIDELYAPPLIEDINTHEAREASOFSEALING,BEARING,GRINDING,SPEAKER,DAMPERANDSOON1,2INVESTIGATIONSIN3–5SHOWEDTHATTHEMAGNETICFIELDSTRENGTHINFLUENCEDTHEVISCOSITYOFMAGNETICFLUIDSWHENMAGNETICFLUIDSWEREEXPOSEDTOAMAGNETICFIELDTHEAPPLICATIONOFMAGNETICFLUIDSINANELECTRICMOTORWASALSOSTUDIEDIN6BECAUSEOFTHEHIGHERMAGNETICPERMEABILITYOFMAGNETICFLUIDSTHEAPPLICATIONOFMAGNETICFLUIDSINHYDRAULICSERVOVALVESWASSTUDIEDRECENTLYIN7HYDRAULICSERVOVALVESARETHENECESSARYCOMPONENTSINHYDRAULICCONTROLSYSTEMSTHECHARACTERISTICSOFHYDRAULICSERVOVALVESSIGNIFICANTLYINFLUENCETHEPERFORMANCEOFHYDRAULICCONTROLSYSTEMSASTHEELECTROMECHANICALMECHANISMINHYDRAULICSERVOVALVES,TORQUEMOTORSAREUSEDTOSTROKETHEVALVESFROMELECTRICSIGNALSIFTHEDYNAMICCHARACTERISTICSOFATORQUEMOTORCANBEMODIFIED,THEPERFORMANCEOFAHYDRAULICSERVOVALVECANBEIMPROVEDTHEAIMOFTHISPAPERISTOINVESTIGATETHEINFLUENCEOFMAGNETICFLUIDSONTHEDYNAMICCHARACTERISTICSOFAHYDRAULICSERVOVALVETORQUEMOTORASAKINDOFFUNCTIONALMATERIALS,MAGNETICFLUIDSAREFILLEDINTOTHEWORKINGGAPSOFAHYDRAULICSERVOVALVETORQUEMOTORINTHISPAPERFORCESONTHETORQUEMOTORDUETOMAGNETICFLUIDSARESTUDIEDTHEDYNAMICMATHEMATICALMODELSOFTHETORQUEMOTORWITHMAGNETICFLUIDSAREINTRODUCEDAFTERTHATTHEDYNAMICCHARACTERISTICSOFTHETORQUEMOTORWITHMAGNETICFLUIDSAREANALYZEDANDTESTEDANALYSISANDEXPERIMENTALRESULTSARECOMPAREDWITHTHERESULTSWHENMAGNETICFLUIDSARENOTAPPLIEDINTHEMOTORR2007ELSEVIERLTDALLRIGHTSRESERVEDKEYWORDSMAGNETICFLUIDS;HYDRAULICSERVOVALVE;TORQUEMOTOR;HYDRAULICCONTROLSYSTEMS1INTRODUCTIONINFLUENCEOFMAGNETICFLUIDSONTHEDYNAMICCHARACTERISTICSOFAHYDRAULICSERVOVALVETORQUEMOTORSONGJINGLIA,C3,WENBAOBADEPARTMENTOFFLUIDCONTROLANDAUTOMATION,HARBININSTITUTEOFTECHNOLOGY,BOX3040,SCIENCEANDTECHNOLOGYPARK,150001HARBIN,CHINABSCHOOLOFENERGYSCIENCEANDENGINEERING,HARBININSTITUTEOFTECHNOLOGY,BOX458,150001HARBIN,CHINARECEIVED13DECEMBER2006;RECEIVEDINREVISEDFORM27SEPTEMBER2007;ACCEPTED27SEPTEMBER2007AVAILABLEONLINE6OCTOBER2007ARTICLEINPRESS12G,XLENGTHOFGAPATNEUTRAL,DISPLACEMENTOFTHEENDOFARMATURESLI,WBAO/MECHANICALSYSTEMSANDSIGNALPROCESSING2220081008–10151009HMAGNETICFIELDSTRENGTHHTHICKNESSOFMAGNETICFLUIDSSURROUNDINGARMATUREJAINERTIAOFARMATUREKAMECHANICALTORSIONSPRINGCONSTANTOFSPRINGPIPEKM,KTMAGNETICSPRINGCONSTANTANDTORQUECONSTANTOFTORQUEMOTORK0M,K0TMAGNETICSPRINGCONSTANTOFMAGNETICFLUID,TORQUECONSTANTOFMAGNETICFLUIDMSSATURATIONMAGNETIZATIONOFMAGNETICFLUIDM0MAGNETOMOTIVEFORCEDUETOPERMANENTMAGNETNCTURNSOFCOILTDOUTPUTTORQUEOFTORQUEMOTORTPLOADTORQUEDUETOSPRINGPIPETLLOADTORQUEOFARMATURENOMENCLATUREARADIUSOFARMATUREFROMPIVOTTOCENTEROFPOLEFACEAGAREANORMALTOFLUXPATHINAIRGAPAMFWORKINGAREAOFDAMPINGFORCEONARMATUREDUETOMAGNETICFLUIDBAVISCOUSDAMPINGCOEFFICIENTOFMECHANICALARMATUREMOUNTINGANDLOADF,FDAMPINGFORCEDUETOMAGNETICFLUID,RESISTANCEDUETOMAGNETICFLUIDSELFEXCITEDHIGHFREQUENCYNOISEANDPRESSUREOSCILLATIONSAPPEARVERYFREQUENTLYINTHEFLOWFIELDOFAFLAPPER–NOZZLEORAJETPIPESERVOVALVEDUETOCAVITATIONSANDSHEARLAYERINSTABILITIESIFTHECONSTRUCTIONPARAMETERSWERENOTSELECTEDCORRECTLY,ASSHOWNIN8THESELFEXCITEDPRESSUREOSCILLATIONSMAYIRRITATETHEOSCILLATIONSOFTHETORQUEMOTORARMATUREANDTHESPOOLOFASERVOVALVESOTHATTHESERVOVALVEMAYLOSEITSSTABILITYASMAGNETICFLUIDSHAVEAHIGHERSATURATIONMAGNETIZATIONANDALARGERVISCOSITYWHENTHEYAREEXPOSEDTOMAGNETICFIELDS,MAGNETICFLUIDSCANBEFILLEDINTOTHEWORKINGGAPSOFAHYDRAULICSERVOVALVETORQUEMOTORTOINTRODUCEDAMPINGINTOTHEMOTORANDTHESERVOVALVEINTHISPAPER,THEAPPLICATIONOFMAGNETICFLUIDSINAHYDRAULICSERVOVALVETORQUEMOTORISINTRODUCEDMATHEMATICALMODELSFORFORCESDUETOMAGNETICFLUIDSONTHETORQUEMOTORARESTUDIEDDYNAMICCHARACTERISTICSOFAHYDRAULICSERVOVALVETORQUEMOTORARESIMULATEDANDTESTEDWHENMAGNETICFLUIDSAREAPPLIEDINTHEMOTOR2CONSTRUCTIONOFAHYDRAULICSERVOVALVETORQUEMOTORWITHMAGNETICFLUIDSTHECONSTRUCTIONOFAHYDRAULICSERVOVALVEANDTORQUEMOTORWITHMAGNETICFLUIDSISSHOWNINFIG1THEEQUIVALENTMAGNETICCIRCUITOFTHETORQUEMOTORISSHOWNINFIG2AHYDRAULICSERVOVALVECANUSUALLYBEDIVIDEDINTOTHEVALVEPART,THEFLAPPER–NOZZLEPARTANDTHETORQUEMOTORTHEVALVEPARTINCLUDESASPOOLANDAVALVEBODYTHEFLAPPER–NOZZLEPARTINCLUDESAFLAPPERANDTWONOZZLESTHETORQUEMOTORUSUALLYCONSISTSOFCORES,ANARMATURESUPPORTEDBYASPRINGPIPE,TWOCOILSANDTWOPERMANENTMAGNETSTHEFLAPPERANDTHEARMATUREARECONNECTEDWITHEACHOTHERANDTHEREFORENAMED‘‘ARMATURE–FLAPPERGROUP’’SOMETIMESTMF1LOADTORQUEDUETOVISCOSITYOFMAGNETICFLUIDTMF2LOADTORQUEDUETOSATURATIONMAGNETIZATIONOFMAGNETICFLUIDZ0VISCOSITYOFMAGNETICFLUIDINTHEABSENCEOFAMAGNETICFIELDZMFVISCOSITYOFMAGNETICFLUIDEXPOSEDTOAMAGNETICFIELDYROTATIONANGLEOFARMATUREO0ROTATIONSPEEDOFARMATUREDIDIFFERENCECURRENTOFCOILSDP1,DP2STRESSONARMATUREDUETOMAGNETICFLUIDSINGAPS1AND2ARTICLEINPRESSSLI,WBAO/MECHANICALSYSTEMSANDSIGNALPROCESSING2220081008–10151010NSMAGNETICFL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