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1、-5-英文原文FEATURE-BASEDCOMPONENTMODELSFORVIRTUALPROTOTYPINGOFHYDRAULICSYSTERMAbstract:Thispaperproposesafeature-basedapproachforthevirtualprototypingofhydraulicsystems.Itpresentsaframeworkwhichallowsthedesignertodevelopavirtualhydraulicsystemprototypeinamoreintuitivemanner,i.e.throughassemblyofvirt
2、ualcomponentswithengineeringdata.Theapproachisbasedonidentifyingthedatarequiredforthedevelopmentofthevirtualprototypes,andseparatingtheinformationintobehaviour,structural,andproductattributes.Suitablerepresentationsoftheseattributesarepresented,andtheframeworkforthefeature-basedvirtualprototypin
3、gapproachisestablished,basedonthehierarchicalstructureofcomponentsinahydraulicsystem.Theproposedframeworknotonlyprovidesaprecisemodelofthehydraulicprototypebutalsooffersthepossibilityofdesigningvariationclassesofprototypeswhosemembersarederivedbychangingcertainvirtualcomponentswithdifferentfeatu
4、res.Keywords:Computer-aidedengineering;Fluidpowersystems;Virtualprototyping1.IntroductionHydraulicsystemdesigncanbeviewedasafunction-to-formtransformationprocessthatmapsanexplicitsetofrequirementsintoaphysicalrealisablefluidpowersystem.Theprocessinvolvesthreemainstages:thefunctionalspecification
5、stage,theconfigurationdesignstage,andtheprototypingstage.Theformatforthedescriptionofthedesignineachstageisdifferent.Thefunctionalspecificationstageconstitutestheinitialdesignwork.Theobjectiveistomapthedesignrequirements.Toachievethis,thedesignproblemsarespecifiedCorrespondenceandoffprintrequest
6、sto:DrS.C.Fok,SchooolofMechanicalandProductionEngineering,NanyangTechnologicalUniversity,NanyangAvenue,Singapore639798.Thedesignermustidentifytheperformanceattributes,whichcanincludepressure,force,speed,andflowrate,withtherequiredpropertiessuchassize,cost,safetyandoperatingsequence.performancere
7、quirementsforeachattribute.Inthisstage,thedesignisabstractedintermsoftheperformanceattributeswithassociatedvalues.Theobjectiveoftheconfigurationdesignstageistosynthesiseahydrauliccircuitthatperformstherequiredfunctionsconfor
