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,elaboratedtheelevatorcontrolsystemconstitutionandtheoperationalfactor.Elaboratedtheelevatorspeedcurveproducesthemethod,hasinducedthecharacteristicwhichdesignsbyPLCconstitutioncontrolsystemsoftware.Keyword:Loadcharacteristicsidealvelocitycurvecontrolsystemsoftwaredesign1.OutlineAlongwiththeurbanconstructionunceasingdevelopment,thehigh-riseconstructionunceasinglyincreases,theelevatorhasthewidespreadapplicationinthenationaleconomyandthelife.Theelevatortookinthehigh-riseconstructiontheverticalmovementtransportationvehiclealreadyandpeoplesdailylifeisinseparable.Infacttheelevatorisaccordingtoexteriormovementandsooncallingsignalaswellasowncontrolrule,butcallsisstochastic,theelevatorisapersonmachineinteractivecontrolsysteminfact,purelyiscannotsatisfythecontrolrequestwiththesequentialcontrolorthelogicalcontrol,Therefore,theelevatorcontrolsystemusesthestochasticlogicalwaycontrol.Atpresenttheelevatorcontrolgenerallyhasselectedtwomethods,oneisusesthemicrocomputertotakethesignalcontrolunit,completestheelevatorsignalgathering,therunningstatusandthefunctionhypothesis,realizestheelevatorautomaticdispatchandthecollectionchoosesthemovementfunction,drivesthecontroltocompletebythefrequencychanger；Thesecondcontrolmode(PLC)substitutesforthemicrocomputerrealizationsignalcollectionwiththeprogrammablecontrollertochoosethecontrol.Saidfromthecontrolmodeandtheperformance,thesetwomethodscertainlynottoobigdifference.Thedomesticfactorymostlychoosesthesecondway,itsreasonliesintheproductionscaleslightly,owndesignandthemanufacturemicrocomputercontroldevicecostishigher；ButPLCreliabilityhigh,programmingconveniencenimble,theantijammingabilitystrong,themovementstableisreliableandsoonthecharacteristic,thereforethepresentelevatorcontrolsystemwidelyusestheprogrammablecontrollertorealize.2.ElevatoridealperformancediagramIndicatedaccordingtothemassiveresearchandtheexperiment,thepersonmayacceptthemaximumaccelerationisam=1.5m/s2,accelerationrateofchangerhom=the3m/s3,elevatoridealperformancediagrammaydivideaccordingtotheaccelerationisthetriangle,the无锡职业技术学院毕业设计中英文翻译3trapezoidandthesineprofile,Asaresultofsineprofileaccelerationcurverealizationmoredifficult,butthetrianglecurvemaximumaccelerationandisstartingandappliesthebrakethesectionturningpointaccelerationrateofchangetobebiggerthanthetrapezoidalcurve,namely+rhomjumpsto-rhomorjumpsfrom-rhomto+rhothemaccelerationrateofchange,thereforeverylittleuses,becausethetrapezoidalcurveiseasytorealizeandhasthegoodaccelerationrateofchangefrequenttarget,thereforeiswidelyused,usesthetrapezoidalaccelerationcurveelevatoridealperformancediagramlikechart1toshow:Theintelligentfrequencychangerisfortheelevatorspecial-purposefrequencychangerrequestandsoonelevatornimblevelocitymodulation,controlandhighaccuracyevenlevelwhichbutspeciallydesigns,mayuseforpartsthegeneralthree-phaseasynchronousmotor,andhasfunctionandsoonintellectualizedsoftware,standardconnection,menuprompt,inputelevatorcurveandotheressentialparameter.Ithasthedebuggingconveniencequickly,moreovercanautomaticallyrealizethesinglemultilayeredfunction,andhastheautomaticoptimizationdecelerationcurvethefunction,iscomposedthevelocitymodulationsystemcrawlingtimebyitfew,theevenleveldistanceisshort,nomatteristhedoublewindingelectricmotor,or单绕组electricmotorsuitable,itshighestdesignspeedmayreach4m/s,itsuniquecomputermonitoringsoftware,maychoosetheserialinterfacerealizationinput/outputsignalthenon-electroniccontactcontrol.Thefrequencychangerconstituteselevatorsystem,whenthefrequencychangerreceivesthecontrollertosendoutshoutstheladderdirectionsignal,thefrequencychangerbasishypothesisspeedandtheaccelerationvalue,thestartingmotor,afterachievedthemaximumspeed,theuniformspeedmoves,whenarrivesthegoalleveldecelerates,thecontrollersendsoutshutsoffthehighvelocitysignal,reducesthespeedwhichthefrequencychangerestablishesthemaximumspeedtoreducetothecrawlingspeed,Indeceleratesinthemovementprocess,thefrequencychangercantheautomaticcomputationdeceleratetotheevenlevelspotbetweendistance,andcalculatestheoptimizedcurve,thuscanaccordingtotheoptimizedcurvemovement,causethelowspeedcrawlingtimetoreduceto0.3s,thefrequencychangerthroughadjustslevelingthespeedintheelevatorevenlevelprocessorappliesthebrakethepitchtoadjustlevelingtheprecision.Namelywhentheelevatorstopstooearly,thefrequencychangerincreasesthelowspeedvalueorthereductionappliesthebrakethepitchvalue,otherwisereducesthelowspeedvalueorincreasesappliesthebrakethepitchvalue,whentheelevatortoleavesevenlevelposition4-10cm,hastheevenlevelswitchautomaticseparationlowspeedsignal,thesystemaccordingtotheoptimizedcurverealizationhighaccuracyevenlevel,thusachievedtheevenlevelaccurateisreliable.无锡职业技术学院毕业设计中英文翻译43.ElevatorspeedcurveElevatormovementcomfortablenessisdecidedinitsmovementprocessaccelerationaandtheaccelerationrateofchangepsize,theoversizedaccelerationortheaccelerationrateofchangecancreatepassengersillfeeling.Atthesametime,forguaranteedtheelevatortheoperatingefficiency,a,thepvaluenotsuitableexcessivelyissmall.Canguaranteea,thepbestvalueelevatorperformancediagramiscalledtheelevatortheidealperformancediagram.Theelevatormovementidealcurveshouldbetheparabola-straightlinecomprehensivevelocitycurve,namelyelevatorCanada,reducestheprocessconstitutesbytheparabolaandthestraightline.Theelevatorassignsthecurveiswhetherideal,directinfluenceactualperformancediagram.3.1velocitycurveshavethemethodUsesFX2-64MRPLC,andaconsiderationinputoutputrequestincreasedFX-8EYT,FX-16EYR,theFX-8EYRthreeexpansionsmodulesandtheFX2-40AWtwistedpairlinecorrespondenceadapter,FX2-40AWusesinthesystemserialcommunication.UsingPLCtheexpansionfunctionmoduleD/Amodulerealizationspeedidealcurveoutput,whenbeforehandthedigitizedidealvelocitycurvestoresthePLCregister,theproceduremovement,throughlooksupthetablewaytoreadinD/A,transformsthesimulationquantityafterD/Athespeedidealcurveoutput.3.2Accelerationassignthecurvetheproduction8D/Aoutputs05V/010V,thecorrespondingnumericalvalueis16enterssystemseveral00FF,altogether255levels.Ifelevatorrisetimebetween2.53seconds.Accordingtotheconservativevaluecomputation,intheelevatoraccelerationprocesseachtimeZhaBiaotime-gapnotsuitablysurpasses10ms.Asaresultofelevatorlogiccontrolsectionprocedurebiggest,butthePLCmovementusesthecyclicalscanningmechanism,thususuallyuseslooksupthetablemethod,ZhaBiaoinstructiontime-gapexcessivelyiseachtimelong,cannotsatisfiedlyassignthecurvetheprecisionrequest.InthePLCmovementprocess,itsCPUwithvariousequipmentbetweenexchangeofinformation,userprogramexecution,signalgathering,controlquantityoperationandsoonoutputallisdeferstothefixedordertocirculatethescanningwaytocarryon,eachcirculationallmustcarryontheinquiry,thejudgementandtheoperationtoallfunctions.Thiskindoforderandtheformcapablepersonarenotthechange.Theusualscanningcycle,isbasicmustcompletesixstepsthework,includingmovementsurveillance,andprogrammingexchangeinformation,anddigitalprocessorexchangeinformation,andcommunicationprocessorexchangeinformation,executionuserprogramandinputoutputconnectionservice无锡职业技术学院毕业设计中英文翻译5andsoon.Inacycle,CPUonlycarriesouttotheentireuserprogram.Thiskindofmechanismhasitsconvenientoneside,buttimelinessisbad.Theexcessivelylongscanningtime,directlyaffectsthesystemtothesignalresponseeffect,inundertheguaranteecontrolfunctionpremise,maximumlimitreducesCPUthecyclicalscanningtimeisaverycomplexquestion.Generallyonlycanshortadoptthemethodfromtheuserprogramexecutiontime.Theelevatorlogiccontrolsectionprocedurescanningtimehassurpassed10ms,althoughhasadoptedsomereducedprocedurescanningtimemeans,butstillwillbeunabletoscanthetimetofallto10msbelow.Atthesametime,appliesthebrakethesectioncurvetouseaccordingtoisawayfromtheprinciple,eachsectionofdistancesarrivetheresponsetimenotsuitablysurpasses10ms.Inordertosatisfythesystemthetimelyrequest,inthevelocitycurveproductionway,usestheseverancemethod,thuseffectivelyhasovercomethePLCscanningmechanismlimit.Thestartingaccelerationmovementbydecidesthecycleinterruptserviceisrtocomplete.Thiskindofseverancecannotcarryontheswitchbytheprocedure,onceestablishes,continuouslypressesthehypothesistime-gapcirculationseverance,therefore,thestartingmovementconditionmustputintheinterruptserviceisr,whendoesnotsatisfythemovementcondition,theseverancenamelyreturns.3.2DeceleratesappliesthebrakethecurveproductionInordertoguaranteeappliesthebrakeprocesscompleting,mustcarryoninthemasterroutineappliesthebraketheconditiontojudgeandtodecelerateadetermination.Indeceleratesbeforeadetermination,theelevatorcontinuouslyisintheaccelerationorthesteady