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.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
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