2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、外文翻譯（原文）1PlantModelGenerationfPLCSimulationHyeongTaeParkAbstract:ThispaperreptsanautomatedprocedurefconstructingaplantmodelfPLCsimulation.SincePLCprogramscontainonlythecontrollogicwithoutinfmationontheplantmodelitisneces

2、sarytobuildthecrespondingplantmodeltoperfmthesimulation.ConventionallyaplantmodelfPLCsimulationhasbeenconstructedmanuallywhichrequiresmuchefftindepthknowledgeofthesimulation.Asaremedyfthisproblemweproposeanautomatedproce

3、durefgeneratingaplantmodelfromthesymboltableofaPLCprogram.TodosoweproposeanamingrulefPLCsymbolssothatthesymbolnamesincludesufficientinfmationontheplantmodel.Byanalysingsuchsymbolnamesweextractaplantmodelautomatically.The

4、proposedmethodologyhasbeenimplementedtestrunsperfmed.Keywds:agilemanufacturingCADCAMCAPPsimulation1.IntroductionTosurviveprosperinthemodernmanufacturingeramanufacturersneedtocontinuouslyimprovetheirproductsaswellastheirp

5、roductionsystems.Amodernmanufacturinglineisahighlyintegratedsystemcomposedofautomatedwkstationssuchasrobotswithtoolchangingcapabilitiesahardwarehlingsystemstagesystemacomputercontrolsystemthatcontrolstheoperationsoftheen

6、tiresystem.Sincetheimplementationofamanufacturinglinerequiresheavyinvestmentproperverificationofaline’soperationalstatusshouldbeperfmedtoensurethatthehighlyautomatedmanufacturingsystemwillsuccessfullyachievetheintendedbe

7、nefits.Simulationtechnologyisconsideredtobeanessentialtoolinthedesignanalysisofcomplexsystemsthatcannotbeeasilydescribedbyanalyticalmathematicalmodels.Simulationisusefulfcalculatingutilisationstatisticsfindingbottlenecks

8、pointingoutschedulingerrsevenfcreatingmanufacturingschedules.TraditionallyvarioussimulationlanguagesincludingARENAAutoModhavebeenusedfthesimulationofmanufacturingsystems.外文翻譯（原文）3Productionsystemstypicallyconsistofsimult

9、aneouslyoperatingmachineswhicharecontrolledbyPLCscurrentlythemostsuitablewidelyemployedindustrialcontroltechnology.APLCemulatesthebehaviourofanelectricladderdiagram.Astheyaresequentialmachinestoemulatethewkingsofparallel

10、circuitsthatrespondinstantaneouslyPLCsuseaninputoutputsymboltableascanningcycle.WhenaprogramisbeingruninaPLCitiscontinuouslyexecutingascanningcycle.TheprogramscansolvestheBooleanlogicrelatedtotheinfmationintheinputtablew

11、iththatintheoutputinternalrelaytables.Inadditiontheinfmationintheoutputinternalrelaytablesisupdatedduringtheprogramscan.InaPLCthisBooleanlogicistypicallyrepresentedusingagraphicallanguageknownasaladderdiagram(IEC2003).Si

12、ncetheabstractionlevelsofconventionalsimulatsPLCprogramsarequitedifferentthecontrollogicofconventionalsimulatscannotbereusedfthegenerationofPLCprograms.UsuallyelectricalengineersmanuallywritePLCprogramsbyreferringtothero

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