纯电动汽车用AMT参数设计及换挡控制策略优化

纯电动汽车用AMT参数设计及换挡控制策略优化重庆大学硕士学位论文（学术学位）学生姓名：吉毅指导教师：胡建军副教授专业：车辆工程学科门类：工学重庆大学机械工程学院二O一四年五月ParameterDesignandShiftingControlStrategyOptimizationofAMTforPureElectricVehicleAThesisSubmittedtoChongqingUniversityinPartialFulfillmentoftheRequirementfortheMaster’sDegreeofEngineeringByJiYiSupervisedbyA.Prof.HuJianjunSpecialty:VehicleEngineeringCollegeofMechanicalEngineeringofChongqingUniversity,Chongqing,ChinaMay,2014中文摘要I摘要能源危机、环境污染以及温室效应等问题的日益严重，对汽车行业提出了更高的节能减排要求。纯电动汽车由于具有高效、节能、终端零排放等特点，因而受到了世界范围内的广泛关注。为提高电机效率、电池能量利用率、整车续驶里程等性能，纯电动汽车用自动变速器已逐渐向多挡化发展。研究纯电动汽车动力传动系统参数匹配与综合控制，对于提高纯电动汽车整车技术及性能水平具有重要的理论意义。因此，本文提出了纯电动汽车用AMT挡位数设计方法，对两挡AMT的换挡执行机构进行了参数设计，在分析基本换挡控制策略的基础上，结合纯电动汽车用AMT的特点，提出了改善换挡性能和可靠性的控制策略，主要研究内容如下：①在系统的分析电机和变速器各参数间的影响关系的基础上，提出一套相对完善的纯电动汽车变速器挡位数的综合匹配方法。②为了使本文所匹配出的两挡AMT换挡时间达到设计要求，对其用到的换挡执行机构进行了参数设计。③为了改善换挡前后车轮驱动力波动对换挡舒适性和整车动力性的影响，同时尽量避免换挡前后车轮驱动力波动引起的循环换挡，通过分析两挡AMT换挡前后车轮驱动力波动的原因，提出两挡AMT换挡过程中转矩恢复阶段的转矩补偿策略，并通过Simulink软件对所提出的控制策略进行仿真验证。④根据纯电动汽车用两挡AMT在结构和换挡控制原理上的特点，提出专门的故障诊断和处理策略。⑤利用课题组搭建的纯电动汽车传动性能试验台，建立基于MATLAB/Simulink和dSPACE软硬件平台的仿真实验模型，通过台架换挡试验验证所设计的换挡执行机构是否满足要求，以及所提出的纯电动用两挡AMT故障诊断和处理策略是否有效。关键词：纯电动汽车，机械式自动变速器，参数设计，转矩补偿策略，故障诊断与处理重庆大学硕士学位论文II英文摘要IIIABSTRACTAsenergycrisisandenvironmentalissuessuchaspollutionandglobalwarmingbecomeincreasinglyworse,theautomotiveindustryhasputforwardhigherrequirementsofenergysavingandemissionreduction.Pureelectricvehicle(PEV)hasreceivedworldwideattentionbecauseofitsmanyadvantages,suchaslowlevelofnoise,zero-emissionandeasinesstooperate.Inordertoimprovethevehicleperformancesuchasthemotorefficiency,thebatteryenergyutilizationandtheendurancemileage,theautomatictransmissionwhichisusedinpureelectricvehiclehasgraduallydevelopedtomulti-speed.Itisofgreattheoreticalsignificancetomakearesearchonpureelectricvehiclespowertrainparametermatchingandintegratedcontrol,thustoimprovepureelectricvehiclestechnologyandperformancelevels.Therefore,thedesignmethodofgearrationumberofAMTforPEVwasproposed,theparameterofshiftingactuatorfortwo-speedAMTwasdesigned,andthecontrolstrategywhichcanimproveshiftingperformanceandreliabilitywasproposedbasedonanalyzingfundamentalshiftcontrolstrategyandthecharacteristicsofAMTforPEV.Themainworksinthispaperareasfollows:(1)AsetofrelativelyperfectcomprehensivematchingmethodsforgearrationumberofAMTforPEVwasproposed,basedonanalyzingtherelationshipbetweenthemotorandthetransmissionparameter.(2)Theparameterofshiftingactuatorfortwo-speedAMTwasdesignedtomeetdemandforshiftingtime.(3)Inordertoimprovetheimpactofthedrivingforcefluctuationbeforeandaftertheshiftforshiftingcomfortandvehiclepowerperformanceandavoidcircularshift,atorquecompensationstrategyforthetorquerecoveryphaseintheshiftingprocessoftwo-speedAMTwasproposedbasedonanalyzingthereasonofthedrivingforcefluctuationbeforeandaftertheshift.TheproposedtorquecompensationstrategywasverifiedbysimulationbasedontheMATLAB/Simulinksoftware.(4)Thetechnicalfaultdiagnosisandtreatmentstrategywasproposedaccordingtothecharacteristicsoftwo-speedAMTforPEVonthestructureandprincipleofshiftingcontrol.(5)Atransmissionperformancetest-benchforPEVwasbuilt.ThesimulationmodelfortestwassetupbasedontheMATLAB/SimulinksoftwareandthedSPACE重庆大学硕士学位论文IVhardware,theshiftingactuatorfortwo-speedAMTwastestedonthebench,thefaultdiagnosisandtreatmentstrategyfortwo-speedAMTwasprovedbythetest.Keywords:pureelectricvehicles;automaticmechanicaltransmission;parameterdesign;torquecompensationstrategy;faultdiagnosisandtreatment目录V目录中文摘要..........................................................................................................................................I英文摘要.......................................................................................................................................III1绪论...........................................................................................................................................11.1课题研究背景...........................................................................................................................11.2纯电动汽车概述.......................................................................................................................21.2.1电动汽车的基本结构........................................................................................................21.2.2国内外纯电动汽车的发展现状........................................................................................41.3纯电动汽车传动系统关键技术的研究现状...........................................................................71.3.1纯电动汽车传动系统的选型分析....................................................................................71.3.2纯电动汽车动力传动系统参数的综合匹配....................................................................81.3.3纯电动汽车用AMT的换挡控制策略.............................................................................91.3.4纯电动汽车用AMT的故障诊断和处理策略..................................................................91.4课题简介.................................................................................................................................101.4.1课题研究的目的和意义................................