机械类文献翻译AutoMod 软件的柔性制系统与仿真.docx
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机械类文献翻译AutoMod软件的柔性制系统与仿真
英文原文
IntelligentInformationManagement,2011,3,186-189
doi:
10.4236/iim.2011.35022PublishedOnlineSeptember2011(http:
//www.SciRP.org/journal/iim)
SimulationofaFlexibleManufacturingSystemwithAutoModSoftware
ZixiaChen1,ChangbingJiang2
1YibinVocationalandTechnicalCollege,Yibin,China2ZhejiangGongshangUniversity,Hangzhou,ChinaE-mail:
czx@,jcb@
ReceivedJune2,2011;revisedJuly4,2011;acceptedJuly15,2011
Abstract
Aflexiblemanufacturingsystem(FMS)isahighlyautomated,complexsystem.Simulationisawell-provenmethodtodesignoranalyzeanFMS.Deploymentofaradiofrequencyidentification(RFID)systeminFMSproduceslargevolumesofRFIDdatastreams,whichprovidevaluableinformationtoimprovetheoperationofFMS.DifferentframeworksarepresentedinthispaperregardingtheuseofRFIDdatastreamsinanFMSsimulation.SimulationsareperformedwithAutoModsoftware.Relatedtechnicaldetailsarealsopresented.Thepaper’sstructureiscompliedasthefollowingsteps:
step1,theintroductionofAMHS,FMSandAutoMod;step2,FMSsimulationusingAutoModsoftware;step3,simulationframeworksdrivenbyRFIDdatastreams;step4,conclusion.
Keywords:
FMS,RFID,DataStream,Simulation,AutoModSoftware
1.Introduction
1.1.AMHSandFMS
Anautomatedmaterialshandlingsystem(AMHS)stores,retrievesandmovesmaterialsthroughprocessestochangetheirformandpackaging.Itreliesprimarilyonautomateddevicestohandlethesematerials.AMHS,suchastheAutomatedStorageandRetrievalSystem(AS/RS)usedinthelogisticssectororotherautomatedmaterialhandlingsystemsutilizedinfactoriesplayanimportantroleinthisaggressivelycompetitiveenviron-ment[1,2].Therefore,improvementstoAMHSareofgreatvalue.
Theflexiblemanufacturingsystem(FMS)playsamoreandmoreimportantroleinAMHS.Figure1de-monstratesaflexiblemanufacturingsystemthatpro-cessesmetalparts.Thestorage/retrievalmachine(S/RM)retrievespalletsofrawpartsfromthestorageracksandplacesthemonconveyorsattheendofeachaisle.Anoperatorthenremovesapartfromitspalletandfastensittoafixtureonanadjacentconveyor.Theconveyortransportsthefixturestoapickuppoint,wheretheyareloadedontoanautomatedguidedvehicle(AGV).
Sixcomputernumericcontrol(CNC)machinespro-cesspartsinthesystem.Aheadchangerisalsoavailablefordrillingtheparts.TheAGVstransportthefixturestotherequiredCNCs,orheadstations.Whenallprocessingofaparthasbeencompleted,anAGVreturnsthepartwithitsfixturetotheconveyornearthestorageracks.Anoperatorremovesthecompletedpartfromthefixtureandreturnsittoapalletforstorageontheracks.Theemptyfixturethencirculatesontheconveyortoreceiveanewrawpart.
ThisFMSisatypicaldiscreteeventsystem.Whileitisdifficulttoevaluateitsefficiencywithtraditionalmethodsbecauseofrandomfactorsandcomputingcom-plexity,simulationisawell-provenwaytodesignandanalyzeFMS.
Figure1.Anexampleofaflexiblemanufacturingsystem
1.2.RFIDDataCollectioninFMS
RFIDisapowerfuldatacollectionmethodwhichcanbeusedinproductcontrolandmaterialhandlingorothermaterialflowprocesses[3].WithdeploymentofRFIDsystemsinFMS,operationcontrolisstrengthenedwiththebettervisibilityoftheprocess.InFMS,pallets,totesorotherloadswhichareflowingthroughtheFMSaretaggedwithRFIDtags.RFIDreadersreadthetagswhichstoretheprocessinginformationatapre-assignedloca-tion.Sensors(RFIDreaders)collecttheinformationofmaterialwhichflowsthroughtheprocesses,andthensendsthisinformationintothedatabase.Undercertainrules,meaningfuleventstrickle,thiscouldbeusedtodriveSupplyChainManagement(SCM)[4],EnterpriseResourcePlanning(ERP)orManufacturingExecutionSystem(MES)informationsystems.Service-orientedarchitecture(SOA)andevent-drivenarchitecture(EDA)aredominantinthisfield[5,6].TheRFIDreaderscanprovidereal-timematerialflowinformationlikeprobesintheobjectsystem.Theinformationincludesitemin-formation,location,processingtimeandarrivaltimewithhighaccuracy.Itcanbestoredinadatastream,intoadatabaseoradatawarehouse.
ForFMSasinFigure1,RFIDreaderscanbesetupatanAS/RSI/Ostation,aCNCworkstationandatAGVpickuppoints.Tagsaretaggedonpalletsandfixtures.Whenpalletsorfixturesflowthroughthesystem,readersreadthetagsandcreatedatarecordsasinTable1.TheserecordsarethenprocessedbyRFIDmiddleware.Finally,largevolumerecordswillbestoredasdata