提升机械类外文翻译矿井提升机精确测速的微机实现中英文翻译外文文献翻译.docx

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提升机械类外文翻译矿井提升机精确测速的微机实现中英文翻译外文文献翻译

英文原文

Theminepitelevatormeasuredpreciselythefastmicrocomputerrealizes

Theminepitelevatoristheminepitproductionimportantequipment,theloadmineral,thematerial,theequipmentandthepersonnelmovesbackandforthtransportation'sdutyinthewellchamber,holdstheextremelyimportantpositionintheminepitregularproduction.Movesreliablysafelyfortheguaranteelifttechnique,therequestcontrolsystem'sperformanceisgood,musthavethehighvelocitymodulationperformanceandthepositioncontrol.

Alongwiththecomputerappliedscience'sswiftdevelopment,usesthecomputercontrolsystemsubstitutionoriginalelectricallycontrolledsystemisonetendency.Asaresultoftheminepitelevatorcontrolsystemhighlycomplexityandtothesecurityreliablestrictrequest,domestichasnotdevelopedatpresentismoreideal,issuitablefortheindustryscenerequestthecomputercontrolsystem.Thisarticleintroducedtheauthorisengagedinapiecewhichthisaspectworks.

1Tothemicrocomputermeasuredthatthefastinstallmentrequest

Tothemicrocomputermeasuredthefastinstallmentthegeneralrequestis:

Resolutionisstrong,theprecisionishigh,asfaraspossibleshortexaminationtime.

1.1resolution

Whencarriesontherotationalspeedexaminationwiththemicrocomputer,theresolutionwithchangeswasmeasuredthattherotationalspeedwhichasurveymeterdigitcorrespondsthechangequantityexpressed.Supposestherotationalspeedwhenbecomen2byn1causesthesurveymetervaluetochangeacharacter,representstheresolutionwithQ:

Theresolutionsizeandsystem'scontrolprecisionrelationsarereallybig,theQvalueissmaller,resolutionisstronger,system'scontrolprecisionishigher,itismeasuresthefastinstallmentanimportanttarget.

1.2measuredthatfastprecision

Measuredthefastprecisionisreferstomeasuresthefastinstallmenttotheactualtachometricsurveyprecisedegree.Ifwith△nrepresentstheobservedvalueandtheactualvaluedifference,nrepresentstheactualrotationalspeed,ε%representthemeasuringerrorwhichexpressedwiththerelativevalue,then

Obviously,ε%issmaller,measuredthatthefastprecisionishigher;system'scontrolprecisionwillbealsohigher.Themeasuringerrorε%sizesdecidedthatinmeasuredthefastpart'smanufactureprecision,andwithmeasuredthefastmethodconcerns.

1.3examinationtime

Theexaminationtimeisreferstobetweentwotimerotationalspeedsamplingthetime-gap.Theexaminationtime'slengththecontrolperformanceinfluenceisverybigtothesystem,iftheexaminationtimeisverylong,thenthesystemwillrealizethestablefastresponsewithdifficulty.Theexaminationtimeisshorter,ismoreadvantageousregardingsystem'scontrolperformance'simprovement.

2Themicrocomputermeasuredthatfastgeneralmethod

Bytheelectro-opticaltyperevolvingencoderandelevator'saxissolidjoint,theelevatorretransmitsthecertainamounteverytime（1080）thesignalimpulse,takesdownthepulsenumberbythecounter,andgivescomputerprocessingtorealizethemicrocomputertomeasurefast.Commonlyusedmeasuredthatthefastmethodmainlyhasthefollowingtwokinds.

2.1TheMlawmeasuresfast

TheMlawmeasuredthatfastisreadsthepulseintegerwhichintheequaltime-gaptherevolvingencodersendsouttofigureouttherotationalspeed.Thepulsenumberwhichsendsoutinthesametimeinternalrotationencoderisdifferent;theobservedvalueisnotsame.TheMlawmeasuredthatfastschematicdiagramasshowninFigure1.

Bythecounterthepulsecountingwhichtransmitstotherevolvingencoder,timereveryothertimeTsendsoutaninterruptrequesttoCPU,extractscorrespondingaccordingtothecountingvalue'ssizetherotationalspeed.Therevolvingencoderretransmitspulse1080everytime,altogetherhasmpulseintheTtime,thentherotationalspeedis:

Thiskindmeasuredthatthefastmethodisbythecountingvaluemsizereflectionrotationalspeedheight,thusiscalledtheMlawtomeasurefast.

（1）Resolution

Mayresultinaccordingtotheresolutiondefinitionbytype（3）:

Obviously,theMlawmeasuredfastwhentheresolutionhasnothingtodowiththespeedsize,concernswithrotationalspeedsamplingperiodT.

（2）measuredthatfastprecision

Whenmeasuresusingtherevolvingencoderfast,itsmeasuringerrordecidedthatconcernsinencoder'smanufactureprecisionandwiththerotationalspeedsize.Supposesbetweentherevolvingencodertwoneighboringpulsestheangulardeviationsare.εp%,anexaminationcycle'scountingvalueism,thenthemeasuringerroris:

Therotationalspeedislower,missmaller,themeasuringerrorisbigger,measuredthatthefastprecisionislower.AlongwiththeRPMdropmeasuredthatthefastprecisionreducesistheMlawmeasuresafastshortcoming.

（3）Examinesthetime:

IsequaltosurveycycleT.

2.2Tlawmeasuredthatfast

Tlawmeasuredfastisdeterminesbetweentherevolvingencodertwooutputpulsesthetimeintervaltocalculatetherotationalspeedtomeasurethefastmethod.Thetimesurveycarriesonthecountingbyacountertotheknownfrequency'sclockpulsetoobtain,theTlawmeasuredthatfastschematicdiagramasshowninFigure2.

TherevolvingencoderoutputsapulsethroughthemicrocomputerconnectionsendsoutaninterrupttoCPU,aftertheCPUresponse,toreadoutthecountingvalueeverytimefromthecounter,thenfiguresouttherotationalspeedbythecountingvalue.Supposestheclockrateisf,countingvaluesbetweentwopulse'sarem,thenrotationalspeednis:

Maysee,theTlawmeasuredthatfastisjusttheoppositewiththeMlaw.Rotationalspeedhighersurveymetervaluemissmaller.

（1）Resolution

Supposes,becausetherotationalspeedcountingvaluebecomesm-1bym,accordingtoresolutiondefinition:

Bytype（7）,Qvaluesizeandrotationalspeedrelated,therotationalspeedissmaller,misbigger,Qissmaller,measuredthatthefastinstallmentresolutionisstronger.TheTlawmeasuredthatthefastmeritliesinthelowspeedsectiontohavethestrongresolutiontotherotationalspeed,thusmayenhancethelowspeedthecontrolperformance.

（2）Measuresthefastprecision

Measuringerrorisequaltotheangulardeviationsbetweentherevolvingencodertwopulsesεp%,namelymeasuringerror:

Itonlydecidedthatinencoder'smanufactureprecision,withismeasuredtherotationalspeedtohavenothingtodowith,itcomparedtotheMlawmeasuredthatthefastprecisionmustmiss.

（3）examinesthetime:

Becausetherevolvingencoderretransmits1080pulseseverytime,thereforebetweentwopulse'stimeintervalsare:

Type（9）indicatedthattheTlawmeasuredthefastexaminationtimechangesalongwiththerotationalspeed.

3Minepitelevatortotachometricsurvey'srequest

Theminepitelevator'smovementprocessisaperiodicprocess.Generallyelevator'spromotioncycleincludingtheacceleration,theconstantspeed,thedeceleration,crawling,stopsfivestages.Infivestages,elevator'srunningratehastheverywidedifference.BelowgivestheAnhuiProvincesomeoreelevatormovementthespeedchart,seeFigure3.Mayseebythespeedchart,intheaccelerationlegandthedecelerationsectionelevator'sspeedisoneprocesswhichchangesunceasinglyaccordingtocertainaccelerationortheretardedvelocity,constantspeedDuanYijiaothehighrunningratemovement,thecrawlingsectionspeedrelativesaysmustbemuchslower,onlythen0.4m/s,generallyspeaking,theelevatormovementprocessisaspeedtheprocesswhichchangesunceasinglyinthewiderange,ifwantstorealizethemicrocomputertomeasureaccuratelyfast,thenmeasuredthatthefastmethodmustsatisfyinthehighspeedandcomparesthelowspeedsectiontobeablethecorrectmeasurementrequest.

Inordertosafeguardtheelevatormovementthehighsecurity,inelevator'seachkindofprotection,hastheconstantspeedsectiontoofastprotectionandthedecelerationsectiontoofastprotection,theconstantspeedsectionrunningratelikesurpasseshighestrotationalspeedVm15%,elevatorsafetyarrestment;Indecelerationsectionmovement,ifdeterminesthespeedtosurpassgivenvalue10%,alsowillimplementthesafetyarrestment.Therefore,toreflectintheelevatormovementaccuratelythespeedcondition,realizesthecontrolsystemsecurity,reliably,tomovecontinuously,requeststhespeedwhichthemicrocomputerdeterminestobeaccurate,cansatisfycertainprecision.

4TheelevatormeasuredpreciselyfastM/Tlaw

Byabovemayknow,elevator'svelocitymeasurementrequesthasthehighprecision,canreflectintheelevatormovementaccuratelytheactualrotationalspeed.Thefore-mentionedMlawmeasuresfast,lowspeedDuanCesutheprecisionisquitelow;TheTlawmeasuresfast,lowspeedsectionrotationalspeedresolutionisstrong,butitmeasuredthatthefastprecisionisalsomuchworsethantheMlaw,theyuseintheelevatormeasuringthefastinsufficientideal;ButM/Tmeasuredthatthefastprinciplesynthesizestwomethodsthemerits,bothmaythelowspeedsectionreliablesurveyingfast,andalsohasthehighresolutioninthehighspeedsection,adaptedtheelevatortothevelocitymeasurementrequest.TheM/TprinciplemeasuredthatthefastprincipleseesFigure4.

AndT0byatimerfixedtime,examinationcycleThadfinishedafterT0,thepulsegeneratoroutput'sfirstpulsedecidedthatnamelyT=T0+△T,m1isthepulsenumberwhichintheTtimetheencodersendsout,m2isincyclicalTtotheclockpulsecountingvalue.Therotationalspeedexpressionis:

Aintheformulafclockpulsefrequency;the108