机械类文献翻译AutoMod 软件的柔性制系统与仿真Word格式文档下载.docx

机械类文献翻译AutoMod 软件的柔性制系统与仿真Word格式文档下载.docx

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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