外文翻译---汽车防抱死制动系统（ABS）.doc -- 5 元

附录附录1AutomobileantilockbrakingsystemABSAbstractThisarticleintroducedbrieflytheautomobileantilockbrakingsystemAntilockBrakingSystem,iscalledABSthecontrolprinciple,thecontroltechnologywhichusedinthepresentautomobileantilockbrakingsystemhascarriedonthesummary,andhascarriedontheforecasttoitstrendofdevelopment.KeywordAutomobileantilockbrakingsystemcontroltechnology1.outlineAlongwithautomobileindustrysrapiddevelopmentandhighwaysunceasingconstruction,automobilestravelsecuritymoreandmoretakesseriouslyforthepeople.Tosatisfyincomprehensivelythebrakeprocesstheautomobiletothebrakerequest,causesthebrakebrakingforceassignmenttohastenreasonably.Theautomobileantilockbrakingsystemi.e.ABSmoreandmorehasappliedontheautomobile.ABSChinesetranslatesisagainstdeadlocksthebrakesystem.Itisonekindhastheskidprevention,againsttodeadlockandsoonmeritautosafetycontrolsystems.ABSisintheconventionbrakesystemfoundationadvancedversiontechnology,separablemechanicalandelectronicformulatwokinds.Onthemodernautomobileinstallstheantilockbrakingsystemmassively,ABSbothhastheordinarybrakingsystemsbrakefunction,andcouldpreventthewheeltodeadlock,enablestheautomobilestilltochangeunderthestopping,guaranteedthatautomobilesbrakeyawingstability,preventedtohavethesideslippingandtorun,wasonthepresentautomobileismostadvanced,thebrakeeffectbestarrestinggear.Theordinarybrakingsystemappliesthebrakeintheslipperyroadsurface,orinemergencybrake,becausethewheeliseasythebrakingforcetosurpassthetireandthegroundfrictionforcehugssafelydies.Theautomobileantilockbrakingsystemisreferstotheautomobileinthebrakeprocesstobeabletherealtimedeterminationwheelsgliderate,theautomaticcontrolfunctiononwheelsbrakingmoment,preventsthewheeltohugdies.Thusobtainsthebestbrakepotencytheelectronicinstallation.Itcanwheelsglideratecontrolincertainscope,usefullybetweenthetireandtheroadsurfaceadhesion,reducesthestoppingdistanceeffectively,obviouslyenhanceswhenthecarbrakingcontrollabilityandstability,wheneachkindoftrafficaccidentwhichhasavoidedthewheelhugsdieseasytoappear.alongwithbrakeintensitysincrease,thewheelrollingingredientaregettingfewerandfewer,butskidstheingredienttobegettingmoreandmore,generallyexplainsinthebrakeprocesswithgliderateStoskidingredienthowmany.Thegliderateisbigger,theglideingredientareless.Anduwheelcenterspeedrdoesnothavetimethegroundbrakingforcewheelrollingradiuswwheelsangularspeed.Longitudinalandthelateraladhesioncoefficientmayexpressforthewheelslipratefunctione.g.Figure1.ThemostgreatlylongitudinalcoefficientofadhesioncorrespondsthegliderateiscalledcriticalpointoffixitySK.GripsfastthepaceaccordingtothecontroltheoryissmallerthantheSKregioniscalledthestablebrakearea,whatSKlaterhascustommadeunstablemovesthearea.ABSispreciselyusesbetweenthepathandtiresrelations,compulsorywheelslipratecontrolnearbycriticalpointoffixitySK,enablestheroadsurfaceadhesionpropertytoobtainthefullestdisplay,thusachievesthebestbrakeeffect.Figure1coefficientofadhesionglideratecurveAtpresentusesABSmainlybyaroundfastsensor,theelectroniccontrolunit,appendicesandsoonpressurecontrolvalveandgroupoflines,pipelineiscomposed.TheABSdevelopmentismainlystudiesthedesignoptimizationoperationandthecontrolproceduresoftware,realizestherealtimeprecisebrakeadjustmenttechnology,simultaneouslyraiseshardwareslevel.2.ControltechnologyusedbyABSnowTheABScontroleffectisdecidedcontroltechnology4whichtoagreatextentusesinthesystem.Atpresentusesismainlythelogicalthresholdvaluecontroltechnology.TofurtherenhanceABStheperformance,butalsoproposedsomebasedontheglideratecontroltechnology,likethePIDcontrol,theglidemodalitychangethestructurecontrols,fuzzycontrolandsoon.Eachkindofcontrolapproachestheexpectationbythedifferentcontrolrulethespot.2.1PIDcontrolsThedefinitionexpectsgliderateS0anddifferenceoftheactualgliderateSforningerroreSS0,thenthePIDcontrolrulemayberepresentedasTherefore,theABScontrollersdesignsumsupfinallyas,accordingtotheABSdynamicsystem,determinedgroupofbestparameterKp,KiandKd,enablewheelsglideratetoapproachhypothesisgoalS0bythequickestway.2.2TheglidemodalitychangesthestructurecontrolAgainstholdsthedeadbrakebytheautomobilethebasicprincipletobepossibletoknow,itsbrakeprocesssessentialquestioniswheelsglideratecontrolincoefficientofadhesionpeakpointSk,thentheglidemodalitychangedstructurebasissystemcondition,thedeviationandthederivativevaluethen,inthedifferentcontrolledarea,byperfectswitchswayhandoffcontrolquantityssizeandthemark,theguaranteesystemintheglideregionverysmallscope,thestatepointlocusS,SalongmovedthefestivalcurvetoslideslipperytothecontrolobjectiveSk,0.usuallytakesthebrakingmomentforcontrolledvariableU,thecutconditionisAndMb,Mbrepresentthebrakingmomentwhichdecidedbythegoverningsystemtoreduce,toincreasetwodifferentconditionsseparately.Forthecutfunction,eSSkistheactualglideraterelativetargetpointdeviation.2.3FuzzycontrolRegardingtakethegliderateascontrolledmembersantilockbrakingsystem,itsinputvaluetakestheexpectationgliderateandwheelactualglideratedeviationEaswellasdeviationsrateofchangeEC,theoutputforthebrakelineflowingtubingheadpressure.Usesthebeltmodificationfactorthefuzzycontroller,usesthecontrollistsummarywhichthefuzzyreasoningalgorithmformsisananalysisformulaUαE1αECAndAlphaisthemodificationfactor,Alphathevaluesizehasreflecteddirectlytothedeviationandthedeviationrateofchangeweightingdegree.ThroughtheadjustmentmodificationfactorAlpha,maychangethecontrolrule.WhenAlphaisbig,indicatedthatisbigtodeviationsweighting,thestepresponseisquick,thecontrolenergymainlyusesinreducingthedeviation,buteasytopresenttheovermodulationWhenAlphaissmall,thecontrolgoalreducestheovermodulation,buttheresponseprocessisslow.UsuallyusesthebelttwoAlphavaluesthemodificationfactorexpressionstobeabletorequestonthesatisfiability,namelyAnd,modificationfactorα1,α2∈0,1,andα12.4LogicalthresholdvaluecontrolThismethodestablishessomecontrollimitinadvancetocertaincontrolledvariablethresholdthevalue,whenappliesthebrake,accordingtothecomputationrealtimeparametervalueandthecorrespondingthresholdvaluessizerelations,determineswheelsstateofmotion,thusthecontroladjustmentbrakepressure,gainsenoughbigbrakeintensityandthegoodyawingstability.OftenincludesastheABScontrolledvariableWheelskiddingrateS,thewheelrotatestheangleaddsreducesthespeedOmegaandtherateofchange.ωandsoonthreekindofdescriptionwheelmovementsituationordynamicsconditionparameter.BecauseonlyusesacontrolledvariabledifficultywithtoguaranteethatABShasthegoodperformanceundereachkindoftravelcondition,therefore,thelogicalthresholdvaluecontrolmethodusuallyrotatesatpresentthewheeltheangleaddsreducesthespeedtotaketheprimarycontrolparameter,buttakeswheelsgliderateSthesecondarycontrolparameter.Andthegliderateisfromeachwheelfastsignalaftercertainlogicdeterminedautomobilesreferencevelocity,calculatesthereferencegliderate,hasthedifferencewiththeactualgliderate.2.5DoubleparametercontrolDoubleparametercontrolsABS,bythevehiclespeedsensorvelocityradar,aroundfastsensor,thecontroldevicecomputerandtheimplementingagencyiscomposed.Itsprincipleofworkisthevehiclespeedsensorandaroundfastsensor,separatelysignalinputthevehiclespeedandroundfastthecomputer,calculatestheactualslippingratebasedonthecomputer,and15one20doeswiththeidealslippingratecompares,fluctuatesbrakesbrakingforceagainthroughthesolenoidvalve.thiskindtowsthefastsensorcommonlyusedDopplervelocityradar.Whentheautomobilegoes,theDopplerradarantennabycertainfrequencytotheearthlaunchingelectromagneticwave,simultaneouslyreceivestheelectromagneticwavewhichunceasinglyreflects,surveystheautomobileradarlaunchandthereceivedifferentialvalue,thenmaycalculatetheautomobilevehiclespeedaccurately.Butturnsthefastsensortoinstallinthetransmissiongearboxoutercovering,actuatesbythetransmissiongearboxoutputshaft,itisapulseelectricalmachinery,producesfrequencyandroundintensivedirectproportion.Theimplementingagencyandsooniscomposedofthesolenoidvalveandtherelay.Solenoidvalveadjustmentbrakingforce,withtheaimofmaintainingtheidealslippingrate.ThiskindofABSmayguaranteethattheslippingrateidealcontrol,againstholdsthebrakingqualitytobegood,butbecauseincreasedavelocityradar,thereforethestructureiscomplex,thecostisalsohigh.2.6SingleparametercontrolIttakecontrolswheelsangleretardedvelocityastheobject,controlswheelsbrakingforce,realizesagainstholdsthedeadbrake,itsstructuremainlybyaroundfastsensor,thecontroller