会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

   首页 人人文库网 > 资源分类 > DOC文档下载

外文翻译---汽车防抱死制动系统(ABS).doc

  • 资源星级:
  • 资源大小:120.50KB   全文页数:13页
  • 资源格式: DOC        下载权限:注册会员/VIP会员
您还没有登陆,请先登录。登陆后即可下载此文档。
  合作网站登录: 微信快捷登录 支付宝快捷登录   QQ登录   微博登录
友情提示
2:本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3:本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

外文翻译---汽车防抱死制动系统(ABS).doc

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

注意事项

本文(外文翻译---汽车防抱死制动系统(ABS).doc)为本站会员(英文资料库)主动上传,人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知人人文库网([email protected]),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5