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1、自动化专业本科毕业设计英文翻译学院（部）：专业班级：学生姓名：指导老师：年月日FOREIGNLITERATUREAtpresent,themaincontrolwayinautomationfieldarerelaycontrol,microcomputercontrolandPLCcontrol.Comparedwiththerelaycontrolsystemandthemicrocomputercontrolsystem,thePLCcontrolsystemhasaseriesofadvantages,suchaslittleworkloadofdesigning,
2、installing,wiringanddebugging,shortcycleofdevelopmentofworkingenvironmentandconvenientmaintenance.Meanwhile,therelaycontrolsystemhasalreadybeenfewusedonthemachinecontrolsystemisinferiorinabilityofanti-interference,highinrequirementofworkingenvironmentandlongindesignanddevelopingcycleofthec
3、ontrolsystem.Soitsapplicationhasbeingondefiningtrendintheautomationcontrolfieldbyyear.Theelectricalcontrolsystemofz-3040Radialarmdrillhasmanydefectssuchascomplexcircuit,highfailurerate,largemaintenanceworkload,poorreliabilityandflexibility.Thispaperintroducesthez-3040Radialarmdrillrelaycon
4、tactanalogcontrolsystemreformationwithPLCtoguaranteetherapidity,accuracyandrationalityofelectriccontrolsystem.Itsatisfiedrealproductiondemandandenhancetheeconomicbenefit.Theoriginalwasintroducedinitialcontrollerofprogrammabledistinguishingfeatureandperformance.Analysesonz-3040’sRadialarmdr
5、illtechniquepropertyandtheworkcycledistancetravelledbyastreamofwaterbase,expoundedtheinitialcontrollerofapplicationES’ssetprogrammablecarryingonthetechnologicaltransformationsystemdesigntosuch,andfinishcomeoutthecontrolproceduretrapeziumpicture.WhatisaPLCcontrolsystem?Sincethe1960stheUnite
6、dStatestolaunchprogrammablelogiccontroller(ProgrammableLogicController,PLC)toreplaceconventionalcontroldevicessincetherelay,PLChasbeenrapiddevelopmentinvariouspartsoftheworldhavebeenwidelyused.Atthesametime,PLC'sfunctionalsoimproved.Withcomputertechnology,signalprocessingtechnology,control
7、technologynetworktechnologydevelopmentanduserdemandforcontinuousimprovement,PLCindealingwiththevolumeswitchonthebasisoftheincreaseintheamountofanalogprocessingandmotioncontrolfunctions.Today,thePLCisnolongerconfinedtothelogiccontrol,motioncontrol,processcontro
