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外文翻译--制冷压缩机速度的模糊控制.doc

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外文翻译--制冷压缩机速度的模糊控制.doc

中文译文FUZZYCONTROLOFTHEREFRIGERATIONCOMPRESSORSPEEDABSTRACTINTHISARTICLE,MENTIONISUSUALLYAPPLIEDTOCOMMERCIALVAPORCOMPRESSIONREFRIGERATIONINSTALLED,USINGFUZZYCONTROLALGORITHMTOCONTROLTHESPEEDOFTHEREFRIGERATIONCOMPRESSORSOASTOACHIEVETHEMOSTEFFICIENTSPEEDTOCONTROLTHETEMPERATUREOFTHEAIRCONDITIONINGITSMAINOBJECTIVEISACCORDINGTOTHEFUZZYCONTROLALGORITHM,ACONTINUOUSREGULATIONOFTHECOMPRESSORSPEEDBYTHECONVERTER,ANDTOESTIMATETHEENERGYSAVINGEFFECT;UNLIKETRADITIONALTHERMOSTATICALLYCONTROLLED,BYCONTROLLINGTHEREFRIGERATINGCAPACITYOFTHECOMPRESSOR,ISAPPLIEDTOTHECONTROLTHESWITCHINGOPERATIONFREQUENCYOFTHECOMPRESSOR50HZCONTROLTHESUPPLYCURRENTOFTHEMOTOROFTHECOMPRESSORREACHESTHESPEEDCHANGERANGEIS3050HZ,LUBRICATIONPROBLEMSDUETOTHEROTATIONALFREQUENCYISTOOLOWTHEREWILLBEARESULTOFASPLASHSYSTEMAPPEARSTODAYAREPROVIDEDONTHEROTATIONALFREQUENCYOFTHECOMPRESSORISGENERALLYNOTCONSIDEREDLESSTHAN30HZCANREPLACER22INTHISRANGE,THETWOMOSTAPPROPRIATEAMONGTHEWORKINGFLUID,THEREAREMANY,SUCHASR407CR32/R125/R134A23/25/52GROUPANDR507GROUPR125/R143A50/50GOODCOMPRESSORSPEEDFUZZYCONTROLCOMPAREDTOTRADITIONALTEMPERATURECONTROLFORREFRIGERATIONANDCOOLINGSYSTEMSEXPERIMENTALRESULTSSHOWTHATWHENTHER407CASTHEWORKINGFLUID,CANACHIEVESIGNIFICANTENERGYSAVINGS13ITISNOTEWORTHYTHAT,FROMENERGYPOINTOFVIEWTHEBESTRESULTSCANBEACHIEVEDWHENTHECHANGEOFTHECOMPRESSORSPEEDINADDITION,TAKINGINTOACCOUNTTHECONVERTERCOSTS,PAYBACKPERIODTHANTHEACCEPTABLEMODELSMOREDECISIVEKEYWORDSCOMPRESSIONSYSTEM,COLDCHAMBER,PISTONCOMPRESSORS,VARIABLESPEED,ARTICLESOFASSOCIATION,FUZZYLOGIC,R407C,R5071INTRODUCTIONVAPORCOMPRESSIONCOOLINGMEANS,THOUGHDESIGNEDTOMEETTHEMAXIMUMLOAD,BUTINORDERTOPROLONGLIFE,USUALLYWORKINGUNDERPARTLOAD,ANDTHROUGHTHESWITCHINGCYCLEREGULATION,OPERATEATAFREQUENCYOF50HZ,ANDTHUSDETERMINESTHETHERMOSTATICCONTROLOFTHEENERGYCONSUMPTIONMOREOVER,THEREFRIGERANTWHENLOWPOWERCONSUMPTIONISCONSIDEREDINDIRECTRELEASEOFGREENHOUSEGASES;IMPROVEDTHEENERGYCONVERSIONEFFICIENCYOFTHEABOVEDESCRIBEDSYSTEMCANREDUCESUCHEMISSIONSAVARIETYOFREFRIGERATIONCAPACITYCONTROLMETHODANDPARTIALLOADTHEORYTHATTHECOMPRESSORSPEEDVARIATIONISTHEMOSTEFFICIENTTECHNOLOGYTHEREFRIGERATINGCAPACITYCONTROLMETHODHASBEENANALYZEDINTHEPAST310YEARS,INCLUDINGIMPROVINGTHESPEEDOFTHECOMPRESSORTOCONSTANTLYACHIEVETHECOOLINGEFFECTTHECONVERTERCANBEUSEDFORREGULATIONOFTHECOMPRESSORSPEEDDIFFERENTTYPESOFELECTRONICVARIABLESPEEDDRIVE,BUTTHEPULSEWIDTHMODULATIONINVERTERPWMBECAUSEOFITSLOWCOSTANDHIGHEFFICIENCYISMOSTAPPLICABLEREFRIGERATIONCAPACITYOFSUCHCONTROLSUSEDINCOMMERCIALCOMPRESSOR,THOUGHONTHEENERGYSAVINGADVANTAGES,BUTTHEREARECERTAINDRAWBACKSSUCHASTHECOSTOFTHEEQUIPMENTANDCOMPRESSORLUBRICATIONANDRELIABILITYTROUBLETHELASTQUESTIONIS,WHENTHETHERMALCONVERTEROFTHESECONDARYFLUIDINTHEGASPHASE,FOREXAMPLE,INTHEREVIEWPLANTISHARMFULHOWEVER,WHENTHESECONDARYFLUIDINTHELIQUIDPHASEWHENITSEEMSTOBEADVANTAGEOUSTHEREFORE,THEMAINPURPOSEOFTHISPAPERISTOSETTHECONTROLLERTOCONTINUOUSLYREGULATEPUMPCOMPRESSORANDOTHERSMALLREFRIGERATIONEQUIPMENTSUCHCONTROLALLOWSUSTOADJUSTTHEREFRIGERATINGCAPACITYOFTHECOMPRESSORATANYTIMETOOBTAINACOOLINGLOAD,ANDTHEREFORETHECOMPRESSOROPERATIONATOTHERFREQUENCIESMAYALSOBELESSTHAN50HZWHENTRADITIONALTEMPERATURECONTROLFORREFRIGERATIONOROTHERSMALLREFRIGERATIONSYSTEM,THECOMPRESSORCANONLYWORKTODOINTHE50HZINPARTICULAR,INCONTRASTTOTHECOMMONLYUSEDVAPORCOMPRESSIONCOOLINGAPPARATUSMENTIONEDHEREINCANBESELECTEDACCORDINGTOTHEFUZZYLOGICCONTROLALGORITHMINTHEREFRIGERATEDTEMPERATURESTHEMOSTAPPROPRIATESPEEDOFTHECOMPRESSORINADDITIONTOTHEFUZZYLOGIC,THECOMPRESSORSPEEDCONTROLMAYBEBYOTHERTECHNOLOGIESSUCHASTRADITIONALPROPORTIONINDISPENSABLEANDPIDCONTROLINPARTICULAR,THEFUZZYLOGICCONTROL,COMPAREPIDPERMITBETTERUSEOFEXPERIMENTALKNOWLEDGEANDTAKECONTROLLOGICOFANONMATHEMATICALMODELACCORDINGTOTHEDEVICEWORKINGCONDITIONSMOREOVER,AFUZZYCONTROLLERPIDCONTROLISSOMETIMESNECESSARYTOHAVECOMPARABLEORBETTERWORKINTHESPECIFIEDOPERATINGPOINTINADDITIONTOTHEMENTIONEDAFUZZYCONTROLLERTOADJUSTTHETIMEWHENTHEREISASUDDENCHANGEINTHECOOLINGLOADONTHEFASTBEATINGSMALLSIGNIFICANTDYNAMICALCHARACTERISTICS;THISOFTENLEADSTOAROBUSTCONTROLTHEREFORE,THEEXPERIMENTALTESTGUIDANCECOMPAREDFACTORYCOMPRESSORCOOLINGCAPACITYCONTROLSYSTEM,FUZZYALGORITHMANDDETERMINETHECOMPRESSORONOFFCYCLETRADITIONALOVENOPERATESATAFREQUENCYOF50HZOFTHEWORKINGFLUIDTOBETESTED,R407CMAINLYR32/R125/R134A23/25/52ANDR507R125/ISOFR143A50/50,R22ISMOSTALTERNATIVE2PILOTPLANTVAPORCOMPRESSIONTESTDEVICE,ASSHOWNINFIGURE1SHOWSAGENERALPURPOSECOMMERCIALEQUIPMENTISCOMPOSEDBYTHEFOLLOWINGPARTS,ALIQUIDRECEIVER,ANAIRCONDENSER,TRANSISTORSANDTWOEXPANSIONVALVES,ATHERMOSTATISAMANUALRELYONTHESUPPORTFREEZERINSIDEAVAPORCOMPRESSIONWORKWANTEDAMAKEROFSAIDCOMPRESSORWORKFORAVAILABILITYTHEFLUIDR22,R507ANDR407;POLYESTEROILLUBRICATION,ANDITSSPEEDREGULATEDBYPWMCONVERTERANDAGROUPOFTHREEPHASEVOLTAGERECTIFIER,DC380V,50HZANDASTRAIGHTTODEPOSITATHREEPHASEACVOLTAGECONVERTER;INVERTERSADJUSTABLEVOLTAGEFREQUENCYWITHTWOVALVESOFTHETHREETUBESMAYTROUBLECANBESOLVED,BECAUSEWHENTHEVARIATIONOFTHESPEEDOFTHECOMPRESSOR,EXPANSIONVALVETHEIRWORKISUNKNOWNTHEUSEOFTHEEXPANSIONVALVEISSPECIALLYDESIGNEDFORR407CANDR507R407ANDOPERATINGIN50HZ,WHENTHETEMPERATUREAT20TO10CWHENTHECAPACITYOFTHECONDENSERCHANGESWITHIN1418KWRANGEAFIXEDTEMPERATUREINTHECONDENSERANDTHEIMITATIONOFEXTERNALCONDITIONS,INADECISIONHEATTHECHANNELANDITSWINDTHEREGULATORTEMPERATURECONTROLRESISTORCANBEDETERMINEDINSOMEEXPERIMENTALTESTSTOSIMULATETHEREGULATORELECTRICHEATINGREFRIGERATIONLOAD,VOLTAGEANDPOWERMEASUREMENTSTABLE1LISTSTHESPECIFICATIONSOFTHECONVERSIONAPPARATUSTHETESTHARNESSISEQUIPPEDWITH32BITA/DCARDCONNECTEDTOTHEPERSONALCOMPUTER,ITHASAHIGHSAMPLINGRATEANDBYTHECONVERSIONDEVICESIMULATIONRESULTSDATACOLLECTIONSOFTWAREINLABVIEWENVIRONMENTHASBEENACHIEVED,ANDTHROUGHABALANCEOFENERGYANDRADIATIONSOFTWAREEVALUATIONOFTHETHERMODYNAMICPROPERTIESOFR407CANDR5073EXPERIMENTALDESCRIPTIONTOASSESSTHEPERFORMANCEOFTHEPRODUCTWHENUSED,ITISNECESSARYTOCOMPAREAT50HZBYSWITCHINGCYCLEREGULATIONANDCONTROLLEDBYTHEFUZZYALGORITHMENERGYCONSUMPTIONINEXPERIMENTALTESTS,THELOADINGOFDIFFERENTTYPESOFCOOLINGHAVEBEENCONSIDEREDFIRSTOFALL,WHENTHEDOOROFREFRIGERATIONPERIODICALLYSWITCHANDINEVITABLEANDOUTDOORAIRHEATEXCHANGEEXPERIMENTHASBEENACHIEVEDTHESEEXPERIMENTSHAVEBEENTESTEDINAWIDERANGEOFTEMPERATURETOCOMPLETETHEOPENREFRIGERATORDOORS5MINUTESEVERY20MINUTESANDWHENTHEOUTSIDETEMPERATUREIS188C,THECOLDSTORAGETEMPERATURETHUSOBTAINEDISGOODIN50TO258CINADDITION,INSOMEOFTHETESTSINTHECOOLINGLOADCANBEOBTAINEDBYTHEELECTRICHEATERLOCATEDINTHEREFRIGERATORCOMPARTMENTCANBECONTROLLED,WHILEINOTHERTESTSTHEREALCOOLINGLOADISCONSIDEREDTOBE200KGFRUITSANDVEGETABLES58CCANSAVEINTHEFIRSTTWOCASEEVERY10MINUTESTOOPENTHEREFRIGERATEDDOORTOMIMICTHEREALWORKENVIRONMENT;MOREOVER,THEEXPERIMENTSCARRIEDOUTINTHEWINTERANDSUMMERTESTINSUMMERTESTSINHEATINGELECTRICHEATINGBUTTHEOUTSIDEOFTHECONDENSERISMAINTAINEDATATEMPERATUREOF328C,ANDINWINTER,THEOUTDOORAIRTEMPERATUREISMAINTAINEDAT108CEXPERIMENTALRESULTSMAINLYREFLECTTHEPOWERCONSUMPTION,GOODPOWERENERGYMETERSTOMEASURETHEENERGYSAVINGEFFECTASSESSMENTBETHELASTTWODAYSOFTHETESTHASBEENACHIEVEDR407CANDR507THECOMPRESSORSPEEDCONTROLFUZZYLOGICFUZZYLOGICONBEHALFALLOWSUSTOGETINFORMATIONFROMVAGUE,AMBIGUOUSORUNCERTAINANSWERMETHODOLOGYISDEFINEDTHECONCLUSIONSCANBEFOUNDTOBEDEFINEDSTARTINGFROMTHEPROXIMITYOFTHEINFORMATIONANDDATAFORTHEFUZZYPROCESSISVERYSIMILARTOTHATOFTHEHUMANBRAININCONTRASTTOTHECLASSICALLOGICMETHODDEPICTTHEPHENOMENONOFMATHEMATICALMODELEQUATIONSTHATREQUIREAPRECISEDEFINITION,FUZZYLOGICALLOWSUSTOSOLVETHEPROBLEMOFCLEARLYDEFINED,ANDFORWHICHITISDIFFICULT,IFNOTIMPOSSIBLE,TODETERMINEANEXACTMATHEMATICALMODELTHEREFORE,THEEXPERIENCEANDKNOWLEDGEOFSUCHSHAPEISNECESSARYINPARTICULAR,FUZZYLOGICISNONLINEARCONTROLANSWERTOYOURQUESTION,ALEGITIMATECHOICEINFACTNONLINEARADOPTRULESRELATINGTOTHEMEMBERSHIPROLEANDREASONINGPROCESSISTREATEDTOENSUREEASIERIMPLEMENTATIONANDSMALLDESIGNFEEINTHECONTROLPERFORMANCE,THEDISADVANTAGESOFTHEOTHERSIDEOFTHELINEARAPPROXIMATIONOFANONLINEARMODELISSIMPLEENOUGH,BUTITHASLIMITATIONSANDMAYOCCURINSOMECASESEXPENSIVEMOREOVER,THEFUZZYCONTROLLERISROBUSTANDALLOWSUSTOEXPERIENCETHROUGHTHEUSEOFOTHERRULESORMEMBERSHIPROLEINAVERYSIMPLEWAYTOIMPROVEORCHANGEMANYEXAMPLESOFFUZZYCONTROLCANBEFOUNDINSOMERECENTAPPLICATIONSINPARTICULAR,INTHEHEATINGVENTILATIONANDAIRCONDITIONINGINDUSTRYTHEREISAWIDEVARIETYOFAPPLICATIONOFFUZZYCONTROLOFTEMPERATUREANDMOISTUREAFUZZYCONTROLLERDESIGNREQUIRESTHREEFUNDAMENTALSTAGESTHEFIRSTISTOESTABLISHTHEINPUTANDOUTPUTVARIABLESTHESECONDISTODEFINETHEINPUTANDOUTPUTVARIABLESMEMBERSHIPROLETHELASTOFWHICHISTHESELECTIONORFORMULAICCONTROLRULESTHEMAINOBJECTIVEOFTHISPAPERISTODETERMINEAFUZZYCONTROLLERISABLETOREGULATETHEELECTRICCOMPRESSORMOTORTRENDOFTHESUPPLYFREQUENCYBLOCKDIAGRAMINFIGURE2COMMERCIALAVALAIBLEREFRIGERATEDTEMPERATUREFUZZYCONTROLPROCESSREPORTSINPARTICULAR,THEFIGURESHOWSATWOINPUTFUZZYCONTROLLERINPUTVARIABLESINTHEADJUSTMENTPOINTTEMPERATUREANDAIRTEMPERATUREBETWEENTHETEMPERATUREDIFFERENCEINCOLDSTORAGE⊿T,ANDTHETEMPERATUREDIFFERENCEBETWEENDERIVATIVESANDTIMED⊿T/DTFUZZYOUTPUTVARIABLEISTHEFREQUENCYOFTHECOMPRESSORMOTORFTHESUPPLYTREND;FUZZYLOGICINACCORDANCEWITHTHEDETERMINATIONOFTHEPOSSIBLEVALUEREPRESENTINGVARIABLESOFTHEFUZZYSETTRADITIONALFUZZYLOGICTHEORYTHEORY,ELEMENTSMAYBELONGORNOTAPARTICULARCOLLECTION,PARTOFTHEMEMBERSHIPALLOWSTHEELEMENTSOFTHECOLLECTIONEACHVALUEOFTHEVARIABLESISCHARACTERIZEDBYCHANGEANDCONTINUITYFROMZEROTOAVALUEOFMEMBERSHIPTHEREFORE,ITISDEFINEDTOESTABLISHTHEMEMBERSHIPOFVARIABLERATEISPOSSIBLEINWHICHEACHOFACOLLECTIONOFVOLATILEMEMBERSHIPROLEFROMANEFFECTIVEPOINTOFVIEW,THEFUZZYCONTROLLERTOACCEPTTHEVALUEOFTHEINPUTVARIABLE,FORSOMEOPERATIONSANDTODETERMINETHEVALUEOFTHEPRODUCTTHISPROCESSISCHARACTERIZEDBYTHREEMAINPHASES;FUZZYCONTROLINFERENCEMECHANISMSANDFUZZYOPERATIONPERMITTEDTOTRANSFORMTHEVALUEISDEFINEDASTHEVALUEOFFUZZYFUZZYARITHMETICPROCESS;INFERENCEPROCESSTODETERMINETHEFUZZYRULESTOBEFIXEDACCORDINGTOTHEEXPERIMENTALREALITY;ALLOWEDTOTRANSFORMVAGUEABOUTTHEPROCESSOFFUZZYCONTROLINTOADEFINEDVALUETHEFUZZYLOGICOFTHEMAJORDIFFICULTIESWITHSPECIFICEXPERIENCENECESSARYBUILDINGDESIGNANDAFUZZYCONTROLLERCONNECTIONACCORDINGLY,ASTHEREGULATIONOFTHEPARAMETERSOFSOMEEXPERIMENTALTHINKWESETTHETHEEXCHANGECOMPRESSORSPEEDCONTROLVARIABLETHEEXACTRULESANDS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