中英文文献翻译—汽车ABS技术及其发展趋势Word格式.docx

中英文文献翻译—汽车ABS技术及其发展趋势Word格式.docx

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@#@附 录@#@附录A.@#@CarABSTechnologyandDevelopmentTrend@#@Inthecarbeforetheemergenceofabs,usedcaristheopenloopbrakesystem.Itscharacteristic isthebraketorqueonlyanddriversofthesizeofthemanipulationoftheforce,brakingforcedistributionregulationandthesizeofthebrakesonandtype.Withnowheelthemotionoffeedbacksignalmeasurement,can'@#@tknowduringwheelbrakespeedandholdingindeath,caryoumayadjustaccordinglywheelcylinderorthegaschamberofthesizeofthebrakepressure.Soinanemergencybrake,inevitablyappearwheelontheground,holdingindeathdraggedthephenomenonofsliding.@#@Whenthewheellock,thegroundoftheperformancewaspoor,thelateralattachedcanprovidethelateraladhesionissmall,carbyexternalforceinanyminuteundertheactionofwillappeardirection,easilyhappenedinstabilityproblemsoftrafficaccidents.Inthewetpavementorsnowandiceontheroad,thedirectionofbraketheinstabilityofthephenomenoncanmoreserious.towingItisthroughthebasicfunctionofsensors'@#@wheeleachtransientstateofmotion,andaccordingtothemotioncorrespondinglyadjustthesizeofthebraketorqueintoavoidthewheelsholdingindeath,itisaphenomenonofclosed-loopbrakesystem.@#@Itistheelectroniccontroltechnologyincarsofthemostsuccessfulapplicationproject,oneofautobrakeantilockbrakesystemscanmakethecarinthebrakingmaintainstabilityandshortenthedirectionbrakingdistance,effectivelyimprovethedrivingsafety.@#@CarABScansayisthemostimportantcarsafetyhistoryofthethreegreatinventions（theothertwoareairbagwithseatbelt）,@#@ABSisalsoothersafetydevice（suchasESPdrivingdynamicstabilitysystemandEBDbrakingforcesbaseddistributionsystem）Becausemoneyspenttoobig,ABSthepracticaluseoftheearlyrailwayvehicleoraircraft.70s,digitalelectronictechnologyandlargescaleintegratedcircuit,fortherapiddevelopmentofABSsystemlaysafoundationtopracticalapplication.Boschcompanyin1978firstlaunchedthedigitalelectroniccontrolunitofthebrakesystem,andABS2Boschholdingdevicein theMercedesBenz,whichopenedonthemodernABSsystemdevelopmentsequence@#@AlthoughtheBoschABS2ofelectroniccontroldeviceisaseparationofthecomponents,butduetothedigitalelectroniccontroldeviceandanalogelectroniccontroldevice,thereactionspeed,comparedtothecontrolaccuracyandreliabilityaresignificantlyimproved,therefore,BoschABS2controleffectalreadyisquitegood.Fromthenon,Europe,AmericaandJapan,manyprofessionalcompanyandbrakecarcompanieshavedevelopedavarietyofABSsystem.Accordingtostatistics,thewholeworldhasmorethan60%ofnewcarsequippedwithABSdevice.@#@Whenthecarbrakewheelspeedandthedifferencesbetweenbodyspeed,canleadtothewheelandtheroad,whenthewheelslippagebetweenproducepurerollingwayandthepavementatcontact,thesliprateiszero,andwheellockthesliprateis100%.Whentheslipratebetween10%~30%,thelargesttransferofpower.Thebasicprincipleofbrakingantilockbrakesystem（2,3]isbasedontheaboveresearch,throughthecontrolregulationsysteminpower,brakingprocess,tothewheelintheslipratecontrol,withinthescopeoftherighttoobtainthebestbrakingeffect.ABSsystemhardwaremainlybythewheelsensor,electroniccontroldevices,brakepressureregulatorthreemajorcomponents,constituteatothesliprateisthecontrolofthetargetoftheclosed-loopcontrolsystem.Thewheelspeedsensorandthedatatransfertotheelectroniccontroldevice.Controldeviceisamicroprocessor,accordingtothewheelspeedsensorsignaltocalculatethespeedofthecar.Inthebrakingprocess,reducingspeedandcontroldeviceofprogrammedidealreducingthespeedofcharacteristiccurveincomparison.Ifcontroldevicejudgethewheelreducingspeedtoolargeandthewheelwillembracedied,signaltohydraulicregulator,hydraulicregulatorisaccordingtothecontroldeviceofthesignaltothebrakewheelcylinderofhydrauliccontrol（theboost,thepressureorbloodpressure）.Brakepressuretoadjustthefrequencyofthecycleupto6~20Hz.ABStechnologyatthecoreoftheproblemisthecontrolalgorithmofresearch.ThecontrolcarABSisacomplex,essentialnonlinearcontrolproblem.Inrecent years,domesticandforeignscholarsinthecontrolofABScalculate@#@Methodonthemanytheoreticalresearch,mainlyinthefollowingseveralcontrol@#@methods.NowautomotiveABSsystemmostoftheproductsaretheaddition,subtractionspeedcontrol,andadditionalthresholdsomeauxiliarythreshold,notinvolvespecificmathematicalmodel.Thresholdcontrolfornonlinearsystemsisaneffectivecontrolmethod.Inthebrakingprocess,canbeaprimaryangularvelocitythreshold,whenactual@#@a