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外文翻译--FX2系列PLC构成电梯控制系统特性分析.doc

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外文翻译--FX2系列PLC构成电梯控制系统特性分析.doc

无锡职业技术学院毕业设计中英文翻译2英文FX2SERIESPLCCONSTITUTIONELEVATORCONTROLSYSTEMCHARACTERISTICANALYSISABSTRACT;INTHEARTICLEHASANALYZEDTHEELEVATORLOADCHARACTERISTICS,ELABORATEDUSESTHETRAPEZOIDACCELERATIONCURVETHEELEVATORIDEALVELOCITYCURVE,UNIFIESTHEFREQUENCYCHANGERANDTHEPLCPERFORMANCE,ELABORATEDTHEELEVATORCONTROLSYSTEMCONSTITUTIONANDTHEOPERATIONALFACTORELABORATEDTHEELEVATORSPEEDCURVEPRODUCESTHEMETHOD,HASINDUCEDTHECHARACTERISTICWHICHDESIGNSBYPLCCONSTITUTIONCONTROLSYSTEMSOFTWAREKEYWORDLOADCHARACTERISTICSIDEALVELOCITYCURVECONTROLSYSTEMSOFTWAREDESIGN1OUTLINEALONGWITHTHEURBANCONSTRUCTIONUNCEASINGDEVELOPMENT,THEHIGHRISECONSTRUCTIONUNCEASINGLYINCREASES,THEELEVATORHASTHEWIDESPREADAPPLICATIONINTHENATIONALECONOMYANDTHELIFETHEELEVATORTOOKINTHEHIGHRISECONSTRUCTIONTHEVERTICALMOVEMENTTRANSPORTATIONVEHICLEALREADYANDPEOPLESDAILYLIFEISINSEPARABLEINFACTTHEELEVATORISACCORDINGTOEXTERIORMOVEMENTANDSOONCALLINGSIGNALASWELLASOWNCONTROLRULE,BUTCALLSISSTOCHASTIC,THEELEVATORISAPERSONMACHINEINTERACTIVECONTROLSYSTEMINFACT,PURELYISCANNOTSATISFYTHECONTROLREQUESTWITHTHESEQUENTIALCONTROLORTHELOGICALCONTROL,THEREFORE,THEELEVATORCONTROLSYSTEMUSESTHESTOCHASTICLOGICALWAYCONTROLATPRESENTTHEELEVATORCONTROLGENERALLYHASSELECTEDTWOMETHODS,ONEISUSESTHEMICROCOMPUTERTOTAKETHESIGNALCONTROLUNIT,COMPLETESTHEELEVATORSIGNALGATHERING,THERUNNINGSTATUSANDTHEFUNCTIONHYPOTHESIS,REALIZESTHEELEVATORAUTOMATICDISPATCHANDTHECOLLECTIONCHOOSESTHEMOVEMENTFUNCTION,DRIVESTHECONTROLTOCOMPLETEBYTHEFREQUENCYCHANGER;THESECONDCONTROLMODEPLCSUBSTITUTESFORTHEMICROCOMPUTERREALIZATIONSIGNALCOLLECTIONWITHTHEPROGRAMMABLECONTROLLERTOCHOOSETHECONTROLSAIDFROMTHECONTROLMODEANDTHEPERFORMANCE,THESETWOMETHODSCERTAINLYNOTTOOBIGDIFFERENCETHEDOMESTICFACTORYMOSTLYCHOOSESTHESECONDWAY,ITSREASONLIESINTHEPRODUCTIONSCALESLIGHTLY,OWNDESIGNANDTHEMANUFACTUREMICROCOMPUTERCONTROLDEVICECOSTISHIGHER;BUTPLCRELIABILITYHIGH,PROGRAMMINGCONVENIENCENIMBLE,THEANTIJAMMINGABILITYSTRONG,THEMOVEMENTSTABLEISRELIABLEANDSOONTHECHARACTERISTIC,THEREFORETHEPRESENTELEVATORCONTROLSYSTEMWIDELYUSESTHEPROGRAMMABLECONTROLLERTOREALIZE2ELEVATORIDEALPERFORMANCEDIAGRAMINDICATEDACCORDINGTOTHEMASSIVERESEARCHANDTHEEXPERIMENT,THEPERSONMAYACCEPTTHEMAXIMUMACCELERATIONISAM15M/S2,ACCELERATIONRATEOFCHANGERHOMTHE3M/S3,ELEVATORIDEALPERFORMANCEDIAGRAMMAYDIVIDEACCORDINGTOTHEACCELERATIONISTHETRIANGLE,THE无锡职业技术学院毕业设计中英文翻译3TRAPEZOIDANDTHESINEPROFILE,ASARESULTOFSINEPROFILEACCELERATIONCURVEREALIZATIONMOREDIFFICULT,BUTTHETRIANGLECURVEMAXIMUMACCELERATIONANDISSTARTINGANDAPPLIESTHEBRAKETHESECTIONTURNINGPOINTACCELERATIONRATEOFCHANGETOBEBIGGERTHANTHETRAPEZOIDALCURVE,NAMELYRHOMJUMPSTORHOMORJUMPSFROMRHOMTORHOTHEMACCELERATIONRATEOFCHANGE,THEREFOREVERYLITTLEUSES,BECAUSETHETRAPEZOIDALCURVEISEASYTOREALIZEANDHASTHEGOODACCELERATIONRATEOFCHANGEFREQUENTTARGET,THEREFOREISWIDELYUSED,USESTHETRAPEZOIDALACCELERATIONCURVEELEVATORIDEALPERFORMANCEDIAGRAMLIKECHART1TOSHOWTHEINTELLIGENTFREQUENCYCHANGERISFORTHEELEVATORSPECIALPURPOSEFREQUENCYCHANGERREQUESTANDSOONELEVATORNIMBLEVELOCITYMODULATION,CONTROLANDHIGHACCURACYEVENLEVELWHICHBUTSPECIALLYDESIGNS,MAYUSEFORPARTSTHEGENERALTHREEPHASEASYNCHRONOUSMOTOR,ANDHASFUNCTIONANDSOONINTELLECTUALIZEDSOFTWARE,STANDARDCONNECTION,MENUPROMPT,INPUTELEVATORCURVEANDOTHERESSENTIALPARAMETERITHASTHEDEBUGGINGCONVENIENCEQUICKLY,MOREOVERCANAUTOMATICALLYREALIZETHESINGLEMULTILAYEREDFUNCTION,ANDHASTHEAUTOMATICOPTIMIZATIONDECELERATIONCURVETHEFUNCTION,ISCOMPOSEDTHEVELOCITYMODULATIONSYSTEMCRAWLINGTIMEBYITFEW,THEEVENLEVELDISTANCEISSHORT,NOMATTERISTHEDOUBLEWINDINGELECTRICMOTOR,OR单绕组ELECTRICMOTORSUITABLE,ITSHIGHESTDESIGNSPEEDMAYREACH4M/S,ITSUNIQUECOMPUTERMONITORINGSOFTWARE,MAYCHOOSETHESERIALINTERFACEREALIZATIONINPUT/OUTPUTSIGNALTHENONELECTRONICCONTACTCONTROLTHEFREQUENCYCHANGERCONSTITUTESELEVATORSYSTEM,WHENTHEFREQUENCYCHANGERRECEIVESTHECONTROLLERTOSENDOUTSHOUTSTHELADDERDIRECTIONSIGNAL,THEFREQUENCYCHANGERBASISHYPOTHESISSPEEDANDTHEACCELERATIONVALUE,THESTARTINGMOTOR,AFTERACHIEVEDTHEMAXIMUMSPEED,THEUNIFORMSPEEDMOVES,WHENARRIVESTHEGOALLEVELDECELERATES,THECONTROLLERSENDSOUTSHUTSOFFTHEHIGHVELOCITYSIGNAL,REDUCESTHESPEEDWHICHTHEFREQUENCYCHANGERESTABLISHESTHEMAXIMUMSPEEDTOREDUCETOTHECRAWLINGSPEED,INDECELERATESINTHEMOVEMENTPROCESS,THEFREQUENCYCHANGERCANTHEAUTOMATICCOMPUTATIONDECELERATETOTHEEVENLEVELSPOTBETWEENDISTANCE,ANDCALCULATESTHEOPTIMIZEDCURVE,THUSCANACCORDINGTOTHEOPTIMIZEDCURVEMOVEMENT,CAUSETHELOWSPEEDCRAWLINGTIMETOREDUCETO03S,THEFREQUENCYCHANGERTHROUGHADJUSTSLEVELINGTHESPEEDINTHEELEVATOREVENLEVELPROCESSORAPPLIESTHEBRAKETHEPITCHTOADJUSTLEVELINGTHEPRECISIONNAMELYWHENTHEELEVATORSTOPSTOOEARLY,THEFREQUENCYCHANGERINCREASESTHELOWSPEEDVALUEORTHEREDUCTIONAPPLIESTHEBRAKETHEPITCHVALUE,OTHERWISEREDUCESTHELOWSPEEDVALUEORINCREASESAPPLIESTHEBRAKETHEPITCHVALUE,WHENTHEELEVATORTOLEAVESEVENLEVELPOSITION410CM,HASTHEEVENLEVELSWITCHAUTOMATICSEPARATIONLOWSPEEDSIGNAL,THESYSTEMACCORDINGTOTHEOPTIMIZEDCURVEREALIZATIONHIGHACCURACYEVENLEVEL,THUSACHIEVEDTHEEVENLEVELACCURATEISRELIABLE无锡职业技术学院毕业设计中英文翻译43ELEVATORSPEEDCURVEELEVATORMOVEMENTCOMFORTABLENESSISDECIDEDINITSMOVEMENTPROCESSACCELERATIONAANDTHEACCELERATIONRATEOFCHANGEPSIZE,THEOVERSIZEDACCELERATIONORTHEACCELERATIONRATEOFCHANGECANCREATEPASSENGERSILLFEELINGATTHESAMETIME,FORGUARANTEEDTHEELEVATORTHEOPERATINGEFFICIENCY,A,THEPVALUENOTSUITABLEEXCESSIVELYISSMALLCANGUARANTEEA,THEPBESTVALUEELEVATORPERFORMANCEDIAGRAMISCALLEDTHEELEVATORTHEIDEALPERFORMANCEDIAGRAMTHEELEVATORMOVEMENTIDEALCURVESHOULDBETHEPARABOLASTRAIGHTLINECOMPREHENSIVEVELOCITYCURVE,NAMELYELEVATORCANADA,REDUCESTHEPROCESSCONSTITUTESBYTHEPARABOLAANDTHESTRAIGHTLINETHEELEVATORASSIGNSTHECURVEISWHETHERIDEAL,DIRECTINFLUENCEACTUALPERFORMANCEDIAGRAM31VELOCITYCURVESHAVETHEMETHODUSESFX264MRPLC,ANDACONSIDERATIONINPUTOUTPUTREQUESTINCREASEDFX8EYT,FX16EYR,THEFX8EYRTHREEEXPANSIONSMODULESANDTHEFX240AWTWISTEDPAIRLINECORRESPONDENCEADAPTER,FX240AWUSESINTHESYSTEMSERIALCOMMUNICATIONUSINGPLCTHEEXPANSIONFUNCTIONMODULED/AMODULEREALIZATIONSPEEDIDEALCURVEOUTPUT,WHENBEFOREHANDTHEDIGITIZEDIDEALVELOCITYCURVESTORESTHEPLCREGISTER,THEPROCEDUREMOVEMENT,THROUGHLOOKSUPTHETABLEWAYTOREADIND/A,TRANSFORMSTHESIMULATIONQUANTITYAFTERD/ATHESPEEDIDEALCURVEOUTPUT32ACCELERATIONASSIGNTHECURVETHEPRODUCTION8D/AOUTPUTS05V/010V,THECORRESPONDINGNUMERICALVALUEIS16ENTERSSYSTEMSEVERAL00FF,ALTOGETHER255LEVELSIFELEVATORRISETIMEBETWEEN253SECONDSACCORDINGTOTHECONSERVATIVEVALUECOMPUTATION,INTHEELEVATORACCELERATIONPROCESSEACHTIMEZHABIAOTIMEGAPNOTSUITABLYSURPASSES10MSASARESULTOFELEVATORLOGICCONTROLSECTIONPROCEDUREBIGGEST,BUTTHEPLCMOVEMENTUSESTHECYCLICALSCANNINGMECHANISM,THUSUSUALLYUSESLOOKSUPTHETABLEMETHOD,ZHABIAOINSTRUCTIONTIMEGAPEXCESSIVELYISEACHTIMELONG,CANNOTSATISFIEDLYASSIGNTHECURVETHEPRECISIONREQUESTINTHEPLCMOVEMENTPROCESS,ITSCPUWITHVARIOUSEQUIPMENTBETWEENEXCHANGEOFINFORMATION,USERPROGRAMEXECUTION,SIGNALGATHERING,CONTROLQUANTITYOPERATIONANDSOONOUTPUTALLISDEFERSTOTHEFIXEDORDERTOCIRCULATETHESCANNINGWAYTOCARRYON,EACHCIRCULATIONALLMUSTCARRYONTHEINQUIRY,THEJUDGEMENTANDTHEOPERATIONTOALLFUNCTIONSTHISKINDOFORDERANDTHEFORMCAPABLEPERSONARENOTTHECHANGETHEUSUALSCANNINGCYCLE,ISBASICMUSTCOMPLETESIXSTEPSTHEWORK,INCLUDINGMOVEMENTSURVEILLANCE,ANDPROGRAMMINGEXCHANGEINFORMATION,ANDDIGITALPROCESSOREXCHANGEINFORMATION,ANDCOMMUNICATIONPROCESSOREXCHANGEINFORMATION,EXECUTIONUSERPROGRAMANDINPUTOUTPUTCONNECTIONSERVICE无锡职业技术学院毕业设计中英文翻译5ANDSOONINACYCLE,CPUONLYCARRIESOUTTOTHEENTIREUSERPROGRAMTHISKINDOFMECHANISMHASITSCONVENIENTONESIDE,BUTTIMELINESSISBADTHEEXCESSIVELYLONGSCANNINGTIME,DIRECTLYAFFECTSTHESYSTEMTOTHESIGNALRESPONSEEFFECT,INUNDERTHEGUARANTEECONTROLFUNCTIONPREMISE,MAXIMUMLIMITREDUCESCPUTHECYCLICALSCANNINGTIMEISAVERYCOMPLEXQUESTIONGENERALLYONLYCANSHORTADOPTTHEMETHODFROMTHEUSERPROGRAMEXECUTIONTIMETHEELEVATORLOGICCONTROLSECTIONPROCEDURESCANNINGTIMEHASSURPASSED10MS,ALTHOUGHHASADOPTEDSOMEREDUCEDPROCEDURESCANNINGTIMEMEANS,BUTSTILLWILLBEUNABLETOSCANTHETIMETOFALLTO10MSBELOWATTHESAMETIME,APPLIESTHEBRAKETHESECTIONCURVETOUSEACCORDINGTOISAWAYFROMTHEPRINCIPLE,EACHSECTIONOFDISTANCESARRIVETHERESPONSETIMENOTSUITABLYSURPASSES10MSINORDERTOSATISFYTHESYSTEMTHETIMELYREQUEST,INTHEVELOCITYCURVEPRODUCTIONWAY,USESTHESEVERANCEMETHOD,THUSEFFECTIVELYHASOVERCOMETHEPLCSCANNINGMECHANISMLIMITTHESTARTINGACCELERATIONMOVEMENTBYDECIDESTHECYCLEINTERRUPTSERVICEISRTOCOMPLETETHISKINDOFSEVERANCECANNOTCARRYONTHESWITCHBYTHEPROCEDURE,ONCEESTABLISHES,CONTINUOUSLYPRESSESTHEHYPOTHESISTIMEGAPCIRCULATIONSEVERANCE,THEREFORE,THESTARTINGMOVEMENTCONDITIONMUSTPUTINTHEINTERRUPTSERVICEISR,WHENDOESNOTSATISFYTHEMOVEMENTCONDITION,THESEVERANCENAMELYRETURNS32DECELERATESAPPLIESTHEBRAKETHECURVEPRODUCTIONINORDERTOGUARANTEEAPPLIESTHEBRAKEPROCESSCOMPLETING,MUSTCARRYONINTHEMASTERROUTINEAPPLIESTHEBRAKETHECONDITIONTOJUDGEANDTODECELERATEADETERMINATIONINDECELERATESBEFOREADETERMINATION,THEELEVATORCONTINUOUSLYISINTHEACCELERATIONORTHESTEADYFASTMOVEMENTPROCESSTHEACCELERATIONPROCESSCOMPLETESBYTHEFIXEDCYCLICALSEVERANCE,ACCELERATESAFTERTHECORRESPONDINGPATTERNMAXIMUMVALUE,THEACCELERATIONPROCEDUREMOVEMENTCONDITIONNOLONGERSATISFIES,AFTEREACHTIMESEVERS,NOLONGERCARRIESOUTTHEACCELERATIONPROCEDURE,DIRECTLYRETURNSFROMTHESEVERANCETHEELEVATORCORRESPONDSTHEPATTERNTHEMAXIMUMVALUEMOVEMENT,DECELERATESINTHISPATTERNTOAFTER,HASTHEHIGHSPEEDCOUNTINGSEVERANCE,THEEXECUTIONDECELERATESTHESERVICEROUTINEREVISESTHECOUNTERINTHISINTERRUPTSERVICEISRTOSUPPOSETHEDEFINITEVALUETHECONDITION,GUARANTEEDTHENEXTTIMEWILLSEVERTHEEXECUTIONINTHEPLCINTERNALREGISTER,DECELERATIONCURVETABLEVALUEFROMBIGTOSMALL,EACHTIMESEVERSALLCARRIESOUTTIMETHEINDICATORNEEDLETOADD1THEOPERATION,THENTHENEXTSEVERANCEWILLLOOKUPTHETABLENUMBERISSMALLERTHANTHISSEVERANCETOLOOKUPTHETABLENUMBERSTHEGATEAREAPEACEFULLEVELAREAJUDGEMENTPRODUCESBYEXTERIORSIGNAL,GUARANTEESTHEMODERATINGPROCESSTHERELIABILITY4ELEVATORCONTROLSYSTEM41ELEVATORSCONTROLSYSTEMCHARACTERISTIC

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