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    • 簡(jiǎn)介:ABSTRACTTHEAUTOMATICTRANSMISSIONATISONEOFTHEMOSTIMPORTANTCOMPONENTSOFMANYAUTOMOBILETRANSMISSIONSYSTEMSTHESHIFTQUALITYHASASIGNIFICANTINFLUENCEONTHERIDECOMFORTOFTHEVEHICLEDURINGTHEATSHIFTPROCESS,THEJOINTELEMENTSSUCHASTHECLUTCHANDBANDSENGAGEORDISENGAGE,LINKINGSETSOFGEARSTOCREATEAFIXEDGEARRATIOSINCETHESERATIOSDIFFERBETWEENGEARSINAFIXEDGEARRATIOTRANSMISSION,THEMOTIONOFTHEVEHICLECOULDCHANGESUDDENLYDURINGTHESHIFTPROCESSIFTHEJOINTELEMENTSAREENGAGEDORDISENGAGEDINAPPROPRIATELY,ADDITIONALLYIMPACTINGTHEENTIRETRANSMISSIONSYSTEMANDINCREASINGTHETEMPERATUREOFCONNECTELEMENTSTHEOBJECTIVEWASTOESTABLISHASYSTEMMODELFORANATPOWERTRAINUSINGMATLAB/SIMULINKTHISPAPERFURTHERANALYSESTHEEFFECTOFVARYINGHYDRAULICPRESSUREANDTHEASSOCIATEDIMPACTONSHIFTQUALITYDURINGBOTHENGAGMENTANDDISENGAGEMENTOFTHEJOINTELEMENTS,PROVINGTHATSHIFTQUALITYIMPROVEMENTSCOULDBEACHIEVEDWITHAPPROPRIATEHYDRAULICPRESSURECONTROLKEYWORDSAUTOMATICTRANSMISSION,SIMULATIONANDANALYSIS,SHIFTQUALITYIINTRODUCTIONAMOTIVATIONANDBACKGROUNDETHODSOFATCONTROLARECONTINUOUSLYBEINGIMPROVEDINORDERTOIMPROVESHIFTQUALITYANDPROVIDEBETTERRIDECOMFORTFORPASSENGERSSHIFTQUALITYDEPENDSMOSTLYONTHESMOOTHNESSDURINGTHESHIFTPROCESSINOTHERWORDS,ASMOOTHSHIFTMEANSTHEREISNOEXORBITANTINSTANTANEOUSACCELERATIONORDECELERATIONDURINGSHIFTINGSINCEAUTOMOBILEPOWERTRAINSCONTAINMULTIROTATIONINERTIALSYSTEMS,THESHIFTPROCESSWILLALWAYSTAKEACERTAINAMOUNTOFTIMEWITHFIXEDGEARRATIOATSVIBRATIONANDSHOCKCANOCCURDURINGSHIFTING,WHICHRESULTSINPASSENGERDISCOMFORTTHEREFORE,INORDERTOIMPROVETHESHIFTQUALITY,ITISIMPORTANTTOTHEORETICALLYANALYZETHESHIFTPERFORMANCEOFANAT,CHOOSEANAPPROPRIATECONTROLMETHOD,ANDOPTIMIZETHEAPPLICATIONOFHYDRAULICPRESSUREBLITERATUREREVIEWSINCETHEATEMERGEDWITHINTHEAUTOMOTIVEINDUSTRY,SHIFTQUALITYHASBEENTHEPRIMARYFOCUSFORTHECHARACTERIZATIONANDEVALUATIONOFDIFFERENTTRANSMISSIONSINRECENTYEARS,THANKSTORAPIDDEVELOPMENTSINELECTRONICCONTROLTECHNOLOGY,RESEARCHINTHEFIELDOFATSHASBEENENHANCED,WITHMANYMAJORMANUFACTURERSAROUNDTHEWORLDCONDUCTINGINTENSIVERESEARCHHOWEVER,THETRADITIONAL4SPEEDATCANNOTMEETTHEDEMANDSOFTHEMODERNCUSTOMER,PROMPTINGAUTOMOBILEPRODUCERSTODEVELOPMOREGEARSETSFORATSFOREXAMPLE,IN2001,YAMAMOTOELALDEVELOPEDANEWAISIN5SPEEDAT,WHICHKLKUOISWITHTHEVEHICLEENGINEERINGDEPARTMENT,NATIONALTAIPEIUNIVERSITYOFTECHNOLOGY,TAIWAN,ROCPHONE8862277121713623EMAILKLKUONTUTEDUTWUSEDANEWPLANETARYGEARBOXRESULTINGINASMALLERSIZEANDBETTERPERFORMANCETHANTHEPREVIOUS4SPEEDAT1IN2003,SCHERERPRESENTEDTHATCOMPAREDTOTHEEARLIER5SPEEDAT,THETOTALAMOUNTOFCOMPONENTSOFTHENEWZF6SPEEDATHADBEENREDUCEDBY29,THELENGTHHADBEENSHORTENEDBY6ANDTHECONTROLMETHODHADBEENQUALITYANDTHERESPONSETIME2IN2004,GREINERETALINTRODUCEDTHENEWMERCEDESBENZ7GTRONIC7SPEEDAT,WITHASHORTERRESPONSETIMEANDBETTERACCELERATIONPERFORMANCETHANANYPREVIOUSAT3IN2007,KONDOETALREVEALEDTHENEWTOYOTAAA80E8SPEEDAT,WITHA65REDUCTIONINFUELCONSUMPTIONCOMPAREDTOTHEABOVE6SPEEDAT4USINGBENEFITSDERIVEDFROMADVANCEDCONTROLTHEORYANDIMPROVEDELECTRONICCONTROLTECHNOLOGY,THEMODERNATHASSEENSIGNIFICANTIMPROVEMENTSINSHIFTQUALITYASWELLASFUELCONSUMPTIONIIATSHIFTPROCESSANALYSISSHIFTPROCESSANALYSISISTHEKEYSTUDYFORATSHIFTQUALITYCONTROLTHEAUTOMATICSHIFTPROCESSISUSUALLYACHIEVEDTHROUGHTHEENGAGEMENTORDISENGAGEMENTOFANUMBEROFBANDSANDCLUTCHESTHEENTIRESHIFTPROCESSCANBEDIVIDEDINTOTWOPHASESTHETORQUEPHASE,WHERETHESPEEDRATIOREMAINSCONSTANTBUTOUTPUTTORQUEDECREASES,ANDTHEINERTIAPHASE,WHERETHESPEEDRATIOCHANGESTHESHIFTPROCESSISCOMPLEXANDCANBEINFLUENCEDBYVARIOUSFACTORSTHEREFORE,ITISNECESSARYTODEVELOPAGENERALMATHEMATICALMODELFORATSHIFTPROCESSANALYSISITISALSOESSENTIALTOSIMPLIFYTHEMOTIONEQUATIONINORDERTOESTABLISHADYNAMICMODELFORTHESYSTEM,ANDUSETHISDYNAMICMODELTOANALYZEANDINVESTIGATETHESHIFTPROCESS5ATORQUEANDINERTIAPHASESINTHESHIFTPROCESSFIGURE1SHOWSTHECURVESOFCLUTCHPRESSURE,OUTPUTTORQUEANDENGINESPEEDDURINGAGEARCHANGEFROM1STTO2NDGEAR6INTHISFIGURE,THESOLIDLINEANDDASHEDLINEREPRESENTWELLANDPOORLYCONTROLLEDCLUTCHPRESSURERESPECTIVELYFIG1SHIFTPROCESSANALYSISKEILINKUOSIMULATIONANDANALYSISOFTHESHIFTPROCESSFORANAUTOMATICTRANSMISSIONMWORLDACADEMYOFSCIENCE,ENGINEERINGANDTECHNOLOGY762011341FIG3MITSUBISHIF4A4ATLAYOUTDIAGRAM10TABLEIICLUTCHENGAGEMENTFORDIFFERENTGEARSSIMSCAPE,WHICHISEMBEDDEDINTHEMATLAB/SIMULINKENVIRONMENT,HASBECOMEANIMPORTANTTOOLRECENTLYITISAFUNDAMENTALPLATFORMFORMODELINGANDSIMULATINGMULTIDOMAINPHYSICALSYSTEMSTHEGREATESTADVANTAGEOFTHISSOFTWAREFORUSERSISTHEAVOIDANCEOFCOMPLICATEDFORMULADERIVATIONTHROUGHTHEPROVISIONOFFUNDAMENTALBUILDINGBLOCKSFORMODELINGSYSTEMSPANNINGMECHANICAL,ELECTRICAL,HYDRAULIC,ANDOTHERPHYSICALDOMAINSASPHYSICALNETWORKSUSINGTHEBUILTINPHYSICALBLOCKSFORTHEENGINE,HYDRAULICTORQUECONVERTER,TRANSMISSION,CLUTCH,GEARBOXANDOTHERDOMAINS,THESIMULATIONSTRUCTUREFORTHEVEHICLEWASTHENESTABLISHED,ASSHOWNINFIG4TABLE4SHOWSTHEPARAMETERSFORTHEWHOLEVEHICLESIMULATIONFIG4VEHICLESIMULATIONSTRUCTUREFIGURE5PORTRAYSTHEHYDRAULICTORQUECONVERTERBLOCKDIAGRAM,WHOSESIMULATIONPARAMETERSHAVEBEENDETERMINEDTHEINITIALROTATIONRATEOFTHEPUMPIMPELLERENGINEWAS750RPM,WHILSTTHETURBINEINITIALROTATIONRATEWAS0RPMTHEASSUMPTIONSFORROTATIONALINERTIAWERE01KGM2FORTHEENGINEANDPUMPIMPELLERAND001KGM2FORTHETURBINEANDSHAFTTABLEIIIVEHICLEPARAMETERSFORSIMULATIONMAXIMUMENGINEPOWER8664KWMAXIMUMROTATIONRATE7000RPMOVERALLWEIGHT1165KGTYRERADIUS0289MASSUMEDROLLINGRESISTANCERATIO?R001ASSUMEDAIRRESISTANCERATIOCD037WINDWARDAREA196M2AIRDENSITY1204KG/M3FIG5HYDRAULICTORQUECONVERTERBLOCKDIAGRAMFIGURE6SHOWSTHEBLOCKMODELFORTHETRANSMISSION,WHERETHEMAXIMUMAPPLICATIONPRESSUREFORALLCLUTCHESWAS1200KPA,THEEFFECTIVEMOTIONRADIUSWAS00662M,THEFISTGEARDECELERATIONRATIOWAS2842,THESECONDGEARDECELERATIONRATIOWAS1529,ANDTHEASSUMEDGEARROTARYINERTIAWAS001KGM2FIG6TRANSMISSIONBLOCKDIAGRAMFIGURE7DEPICTSTHEBLOCKDIAGRAMFORTHEDRIVINGLOAD,WHERETHEFINALDECELERATIONRATIOWAS4042,THEASSUMEDVEHICLEINERTIAWAS125KGM2,THETIERRADIUSWAS0289M,ANDTHEDRIVINGRESISTANCEWASASSUMEDASROLLINGRESISTANCERR?RWANDAIRRESISTANCE22??????ACRDAIVSIMULATIONRESULTSANDANALYSISDURINGTHEUPSHIFTPROCESSFORTHEMITSUBISHIF4A4AT,THEOFFGOINGCLUTCHALTERNATESWITHTHEONCOMINGCLUTCHFORTHEPURPOSESOFTHISPAPER,BOTHWEREANALYZEDINTHESIMULATIONWORLDACADEMYOFSCIENCE,ENGINEERINGANDTECHNOLOGY762011343
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    • 簡(jiǎn)介:1600英文單詞,英文單詞,8500英文字符,中文英文字符,中文2640字文獻(xiàn)出處文獻(xiàn)出處T?MAZ,T?MAJ,KNOFLí?EKR,ETALTHEPROCESSSIMULATIONUSINGBYVIRTUALREALITYJPROCEDIAENGINEERING,2014,6910151020THEPROCESSSIMULATIONUSINGBYVIRTUALREALITYZDENEKT?MA,JIRIT?MA,RADEKKNOFLí?EK,PETRBLECHA,FRANTISEKBRADá?ABSTRACTNOWADAYSCOMPANIESCANSOLVEPRODUCTIONSYSTEMSPROBLEMSBYVARIETYOFSOFTWARESOLUTIONS,BUTINPRACTICEITISKNOWNTHATITISOFTENDIFFICULTTOINTERPRETTHESEOUTPUTS,ILLUSTRATEANDTOFURTHERINTEGRATEONEPOSSIBILITYISTHEUSEOFAUGMENTEDVIRTUALREALITYFORTHEPLANNINGOFTHESESYSTEMSTHISARTICLEDEALSWITHTHECONSTRUCTIONOFTHEEXPERIMENTALSORTINGWORKPLACEASAMODELCASEOFTHEPRODUCTIONSYSTEMWEAKPOINTSOFSOLUTIONARESOLVEDUSINGAUGMENTEDVIRTUALREALITY,WHICHHELPSTOSIMULATETHEPROCESSINREALTIME,INTHISCASETHEVIRTUALDISPLAYEDPRODUCTMOVINGONBELTCONVEYORBEFORETESTINGTHEREALPIECEKEYWORDSVIRTUALREALITYSIMULATIONPROCESSAUGMENTEDREALITY1INTRODUCTIONPRODUCTIONISTHEPROCESSOFTRANSFORMINGRAWMATERIALSINTOFINISHEDPRODUCTSWITHADDEDVALUEFORTHESATISFACTIONOFHUMANNEEDSINNOWADAYSHIGHLYCOMPETITIVEANDDYNAMICBUSINESSENVIRONMENT,INDUSTRIALPRODUCTIONISFACINGNEWCHALLENGESTHATREQUIREHOLISTICVIEWOFTHEFOURMAINCLASSESOFMANUFACTURINGCHARACTERISTICS,EG,COST,TIME,QUALITYANDFLEXIBILITYMANUFACTURINGCOMPANIESTRYTOPRODUCEINNOVATIVEPRODUCTSATLOWCOSTANDATTHESAMETIMESHORTENINGPERIODTOMARKETTHEPRODUCTIONPROCESSHASBECOMEACOMPLEXTASKINORDERTOADDRESSISSUESINCREASINGPRODUCTDIVERSITYWITHREDUCEDPRODUCTIONVOLUMES,CUSTOMIZEACCORDINGTOCUSTOMERREQUIREMENTS,INCREASINGLEGISLATION,SAFETYANDENVIRONMENTALREQUIREMENTSFORTHEPRODUCTINADDITIONTOTHESEISSUESDUETOTHEGLOBALIZATIONOFTHEMARKETISCONSTANTLYGROWING,NEEDFORTHEEXCHANGEOFINFORMATIONINDIFFERENTSTAGESOFTHELIFECYCLEOFAPRODUCTPRODUCTDESIGN,PLANNING,PRODUCTION,ASSEMBLY,ETCTHESEASPECTSAREPUTONPRODUCTIONPROCESSESREQUIREMENTSTOBEINCREASINGLYFLEXIBLEANDSYSTEMATICTHESEISSUESHAVEALREADYBEENSOLVEDANDCREATEDNUMEROUSSYSTEMSANDSOFTWARETOSUPPORTANDSTREAMLINETHEPRODUCTIONPROCESSHOWEVER,TOINTERPRETTHERESULTSOFDESIGNACTIVITIESDESIGNSTILLSEEMSPROBLEMATICRESULTSOFDESIGN,SIMULATIONANDTESTRESULTSAREPRESENTEDEITHERINTHEFORMOFSHEETSINTWODIMENSIONALFORMASILLUSTRATIONSOFTHEPRODUCTIONSYSTEM,ORUSINGCAD,CAMSYSTEMS1,2,5THISMETHODISSUITABLEFOREXPERTSINFIELD,BUTWHENADDRESSISSUESINMULTIDISCIPLINARYTEAMS,THEREAREALSOPEOPLEFROMOTHERDEPARTMENTSOFTHECOMPANYTHEREFORE,ITISNECESSARYTODEALWITHTHEWAYTHERESULTSAREPRESENTED,IFTHEYARESUFFICIENTLYCLEARANDWHETHERWORKINGWITHDATAISUSERFRIENDLYINTHISCASEITTHEDIRECTLYOFFERSTHEPOSSIBILITYTOUSEVIRTUALREALITYAPPLICATIONS11PRODUCTIONSYSTEMANDSAFETYACCORDINGTODEMANDSOFCOMPANIESANDTRADEISNECESSARYTOTAKECAREABOUTSAFETYASPECTSOFPROCESSDIRECTLYINDESIGNPHASETODAYEXISTSALOTOFMATERIALSANDMETHODSHOWTOINSPECTMACHINEINWHOLEPROCESSOFPRODUCTIONFROMTEAMWHICHSTUDYRISKANALYSISWASFOUNDAPOSSIBILITYTOUSEVIRTUALREALITYFORRISKANALYSIS12,BECAUSEITWASFOUNDTHEBIGGESTPROBLEMTOSIMULATESYSTEMSINRETROFITTINGTHEIRSIDEASWASMOVEDFURTHERWITHUSEDAUGMENTEDREALITY12VIRTUALREALITYTHEBELTINREALTIME,ASSHOWNINFIG3WHOLESYSTEMARCHITECTUREISINFIG4FIG3SORTINGWORKPLACEWITHDELTAROBOTFIG4SYSTEMARCHITECTURE22SETTINGTHEAUGMENTEDREALITYSIMULATIONFORCREATIONOFAUGMENTEDREALITYAPPLICATIONSWASUSEDSOFTWAREINTERFACE4AMONGTHEPOSSIBLESOFTWAREWHICHALLOWSTODISPLAYVIRTUALOBJECTSONTRACKINGMARKERWITHTHECAMERAVIAARTOOLKIT7LIBRARYWITHTHISOPENSOURCELIBRARYISPOSSIBLETOUSEPROGRAMMINGLANGUAGESTOAPPLYTHISLIBRARYINTHEFIRSTPHASEWASCREATED3DMODEL,WHICHREPRESENTPOSSIBLENEWPRODUCTOBJECTWASUSEDFORASIMULATIONATSORTINGPROCESSININSPECTIONOFCOLLISIONSWITHPLATFORMONDELTAROBOTTHEVOLUMEMODELWASEDITEDBYDEEPEXPLORATIONSOFTWAREENVIRONMENTTHATALLOWSCONVERSIONTOOTHERFORMATSTHENITWASCREATEDPOLYGONALMODELFROMASOLIDMODELANDSPATIALSCENEPRODUCTMODELDESCRIBEDBYVRMLINFIG5LANGUAGEVRMLWASSELECTEDBECAUSEMODELCOULDBEEDITEDBYLIBRARYARTOOLKITFIG5POLYGONALMODEL7637POLYGONSTHENEXTSTEPWASTOCONNECTTHEARTOOLKITWITHOURUNIQUEMARKERDEFINEDINFIG6THEMARKERHASTOBECREATEDWITHCLEARLYDEFINEDORIENTATIONORIENTATIONOFTHEFEATUREONTHEMARKERWASNECESSARYFROMREASONSOFCLARITYLOCATIONANDROTATIONMODELATTHEMARKERSIZEOFTHEMARKERWASCHOSENTOBESUFFICIENTLYDISTINCTIVEBYUSEDCAMERAWEBCAMLOGITECHC910THE
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