基于计算机的产品虚拟样机技术(IJEM-V1-N4-3)

I.J.EngineeringandManufacturing2011,4,18-24PublishedOnlineAugust2011inMECS()DOI:10.5815/ijem.2011.04.03Availableonlineat’sintegrationframework.IndexTerms:Productdesign;Physicalprototype;Digitalprototype;Virtualprototype©2011PublishedbyMECSPublisher.Selectionand/orpeerreviewunderresponsibilityoftheResearchAssociationofModernEducationandComputerScience.1.IntroductionTheproductdesign&manufacturedepartmentwanttoimproveproductdesignqualityefficientlyinthecircumstanceofintensetradecompetitionandcomplexmodernhightechnologyproductdesign.Theyalsowanttoreducetheperiodicityofproductdesignandthecostofdesignproduct.Duringtheprocessoftraditionalproductdesignandmanufacture,inordertoidentifytheproductwholeperformance,wealwaysusePhysicalPrototypemethod.Buttheperiodicityandcostofthiskindofmethodareveryhigh.WiththerapiddevelopmentofcomputertechnologyandCIMStechnology,VirtualPrototypeisplayingmoreandmoreimportantroleinproductdesignandmanufactureprocessfrom1990.VirtualPrototypeisakindofdigitalmodelwhichcanbesimulated,itissimilartoactualproductinconnectionwithproductdesigninformationorfunction,actionwhichcausedbyproductconcept.2.ConceptofPhysicalPrototype,DigitalPrototypeandVirtualPrototypePrototypeistheoriginalformofproduct.Itdoesn’tneedallcharacteristicsoffinalproduct,itonlyhastheneededkeycharacteristicsofproduct,suchasshape,physicalorfunctionalcharacteristics.Whenwedesignanyproduct,aPrototypeMachineisalwaysexisted.Theso-calledPrototypeMachineisakindofphysicaldevicewhichisaboutsomenewtypeornewdesign.Designerscancheckthecompatibilityamongallcomponents’*Correspondingauthor.E-mailaddress:[e-mail]ologyofProductWhichBasedonComputer19designcharacteristicsandthedesigncharacteristicsofwholePrototypeMachine.ProductPrototypecanbedividedintophysicalprototype,digitalprototypeandvirtualprototype.2.1.PhysicalprototypeInordertocompareallkindsofdesignandmanufacturesections,wealwaysneedtobuildaseriesofproducttestingmodelswithsmallproportionorwholeproportion.Thecorrectnessofproductdesigncanbecheckedbysuchdifferentexperiencebackgroundpeopleasdesign,technology,managementandmarket.Inordertoreflectthecharacteristicsofactualproduct,thiskindoftestingmodel’smanufactureneedsdesignertospendplentyoftimeandcost.Themodelevenaffectsthedeterminingofsystemperformancedirectly.Usually,thiskindofmodeliscalledphysicalprototype.[1]Fig.1showstheparalleldesignofvirtualprototypeproduct.Whentheabovestructurefunctions’designandcheckinghavebeenfinished,thevirtualprototypeofproductcanbeacquiredinaccordancewithproductfunctionstructureinformation,librarycomponentinformationandsomeexperiencedata.Virtualprototypeincludestheneededsystemstructureandphysicaldesigninformation.Wecansimulateandtestvirtualprototypewithallkindsofrestrictionsonthebasisofvirtualprototype.Sowecanjudgetheperformanceparametersofproductwhethermeettherequirementsandthedesignwhetherisreasonablebyanalyzingandplanningphysicalparameters’information.Thenthefeasibilityofproductcanbeknown.Iftheperformanceparameterscansatisfytherequirements,weshouldproposethecorrespondingmodifyingsuggestionsandrebuildvirtualprototypeormodifydesign.Fig.1.Productparalleldesignwhichusedvirtualprototype2.2.DigitalPrototypeDigitalprototypeistheproductmodelwhichdesignedinaccordancewithCADsolidmodelingsoftwareandfeaturemodelingtechnology.Itisakindofreplacetechnologyofphysicalprototype.OnthebasisofCADmodel,wecantaketheengineeringanalysisaboutfiniteelement,kinematicsanddynamics,whichcheckingandimprovingdesigneffect.Alltheseanalyzingprogramscanprovidedetailedinformationaboutproductfunctionswhichonlyusedbyspecializedpeople.Attheoriginalproductdesignstage,wealwaysignoredthedetailedanalysis.Andwepaidmoreattentiontodesignproductshape,wholedistribution.So,thedigitalprototypewhichbasedontraditionalCAD/CAMcanmeettherequirements.[2]ProductionofvirtualprototypeParalleldesign2.3.VirtualPrototypeVirtualprototypefinishesthephysicalprototypemachinefunctionsbyconstructingadigitizedprototypemachine.Itrealizesthemodelingandanalysisfunctionsonthebasisofvirtualprototype.ItcombinessimulationmethodsonthebasisofCADmodel,whichprovidesakindofmethodforthebuildingofprototype.Ofcourse,virtualprototypecan’treplacethecurrentCADtechnology;itworksonthebasisofCADdata.Virtualprototypecanprovideadditionalfunctionalinformationforthedesignedobject,whileproductmodel20VirtualPrototypeTechnologyofProductWhichBasedonComputerdatabaseincludesthewholeandintegratedproductmodeldata.Thiscanprovidesharedinformationfo