机械专业毕业设计（论文）外文翻译

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1、附录Ⅰ：MagnetoelasticTorqueSensorUtilizingaThermalSprayedSense-ElementforAutomotiveTransmissionApplicationsBrianD.KilmartinSiemensVDOAutomotiveCorporationABSTRACTAMagnetoelasticbasedNon-Contacting,Non-CompliantTorqueSensorisbeingdevelopedbySiemensVDOforautomotivetransmissionapplications.S

2、uchasensorwouldbenefittheautomotiveindustrybyprovidingthefeedbackneededforprecisecomputercontroloftransmissiongearshiftingunderawiderangeofroadconditionsandwouldalsofacilitatecross-platformusageofacommontransmissionunit.SiemensVDOhasprototypedtransmissiontorquesensorsoperatingontheprin

3、cipleofInverse-magnetostriction,alsoreferredtoastheInverse-JouleEffectandtheVillariEffect.Magnetostriction,firstdocumentedinthemid1800’s,isastructuralpropertyofmatterthatdefinesamaterial’sdimensionalchangesasaresultofexposuretoamagneticfield.Magnetostrictioniscausedwhentheatomsthatcons

4、tituteamaterialreorientinordertoaligntheirmagneticmomentswithanexternalmagneticfield.Thiseffectisquantifiedforaspecificmaterialbyitssaturationmagnetostrictionconstant,whichisavaluethatdescribesamaterial’smaximumchangeinlengthperunitlength.Inverse-magnetostriction,conversely,defineschan

5、gesinamaterial’smagneticpropertiesinresponsetoappliedmechanicalforces.Materialthatishighlymagnetostrictiveandelasticinnatureisreferredtoasbeingmagnetoelastic.ThepremiseoftheSiemensVDOtorquesensordesignisthatamagnetoelasticmaterialcanbebondedtoacylindricalshaftandmagnetizedinitsmechanic

6、alquiescentstatetocreateasense-element.Whileundertorque,principletensileandcompressivestressvectorsintheformofcounter-spiraling,mutuallyorthogonalhelicesdevelopintheshaftandareconveyedtothemagnetoelasticsense-elementgivingrisetoameasurablemagneticfieldchange.Themagneticfielddeviationth

7、atarisesfromthemagnetoelasticsense-elementisdirectlyproportionaltothemagnitudeoftheimposedtorque.Ineffect,themagneticfieldismodulatedbytorque.Asensitivemagnetometerthentranslatesthefieldstrengthintoananalogvoltagesignal,therebycompletingthetorque-to-voltagetransducerfunction.Critical