汽车车辆类车身电子稳定系统外文文献翻译、中英文翻译、外文翻译

《汽车车辆类车身电子稳定系统外文文献翻译、中英文翻译、外文翻译》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、附录A外文文献ELECTRONICSTABILITYPROGRAMFeedbackcontrolofthevehiclemotionispossiblebyextendingthetractioncontrolsystemwithfouradditionalsensors:steeringwheelangle,brakepressure,yawrateandlateralacceleration.Sincethenominaltrajectorydesiredbythedriverisunknown,t

2、hedriver'sinputsaretakentoobtainnominalstatevariablesthatdescribetheintendedvehiclemotioninstead.Theseinputsarethesteeringwheelangle,theenginedrivetorqueasderivedfromtheacceleratorpedalpositionandthebrakepressure.Thehandlingperformanceofthecarcanbeimprov

3、edifindependenceofthesteeringwheelangletheyawmomentonthecarcanbecontrolled.ThemaintaskofESPasanactivesafetysystemis,however,tolimittheslipangleofthevehicleinordertopreventvehiclespin.ESPcancontroltheyawmomentonthecarbycontrollingthevalueoftheslipateachwh

4、eel.Thiscanbeshownbytheinfluenceofsomebrakeslipvalueattheleftfronttireofafreerollingcarinarightturn(Fig.1).isthelateralforceonthefreerollingtire.Becauseofthebrakeslipthelateralforcewillbereducedtowhereitisassumed,thatneitherthenormalforcenorthetireslipan

5、glearechanged.Asaresultofthebrakeslipthebrakeforceisgenerated.istheresultantforceonthetire,whichisthevectorialsumofand.Ifthetirefrictionlimitisreached,themagnitudesofandareapproximatelyequal.Fig.1YawmomentchangebyslipcontrolTheinfluenceofbrakeslipλisnowo

6、bvious:achangeinthebrakeslipvalueresultsinarotationoftheresultantforceonthetire.Asaresultoftherotationtheyawmomentonthecarischanged.However,simultaneouslythelateralforceandthelongitudinalforceonthecarareinfluenced.Thecontrolconceptdeterminesbywhatamountt

7、heslipateachtireshallbechangedtogeneratetherequiredchangeintheyawmoment.UsuallyitisrequiredthatthedrivermustnothavetheimpressionthatwithESPthecarisslowerthanwithoutESP.ThevehicledynamicscontrollerpartofESP(Fig.2)constitutestheupperpartofahierarchicalcont

8、rol.OutputarethenominaltireslipsInthelowerparttheslipvaluesofthetiresarecontrolled.Thevehicledynamicscontrollerpartconsistsofseveralprocessingblocks.Onthetopleftthemotiondesiredbythedriverisderivedfromhisinputsbyalinearbic