文献翻译四轮转向汽车的转向特性及控制技术Word文件下载.docx

文献翻译四轮转向汽车的转向特性及控制技术Word文件下载.docx

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SteeringBehaviorandControlTechnology

0fFour—wheelSteeringAutomobiIe

ABSTRACT

Thispaperanalysesthecharacteristicsofcarfour-wheelsteeringcontrolto,summarizestheprincipleofconstructionfour-wheelsteeringcars.Introducedthefour-wheelsteeringsystemcontrolstrategy.Pointsoutthefour-wheelsteeringsystemcontroltechnologyfacesdifficulties,andprospectsthetrendofitsdevelopment.

Keywords:

four-wheelsteering;

Steeringcharacteristics;

Workingprinciple;

Control;

Development;

1.Introduction

Withmodernroadtrafficsystemandthedevelopmentofmodernautomobiletechnology,peopleonthecar'

ssteeringcontrolperformanceanddrivingstabilityrequirementisincreasingdaybyday.Asthemosteffectiveimprovevehiclehandlingperformanceofakindofactivechassiscontroltechnology-four-wheelsteeringtechnology.Inthe1980sbeganincarsgetapplication,andasthemodernautomobileindustryandcontinuousdevelopment.Carfour-wheelsteeringmeansinturn,therearcarcanberelativetobodyactivesteering,thatthecarcanbeuptofourwheelsrole.Toimprovethecarturnedtomaneuverability,handlingstabilityanddrivingsafety.

2.Thecar'

ssteeringfour-wheelsteering

2.14wscarsand2wssteeringprocessanalysis

Ordinarytwowheelsteeringcannotonlythefrontcararounditsownwheelrotationandrelativetobodydeflectionaroundtheprecision,thenwheelrotationandnotonlydeflection.Whenthedriverturnedthesteeringwheel,frontwheelsteering,changeddirectionsfacefronttyre,producedatransverseforce,throughthefrontwheeleffectonbody,makethebodyyawingandproducecentrifugalforce,therearwheelscornering,producedchangedirection,participateinthesportscarto.Andtherearandfrontcar4wsas,canrotationcanalsodeflection.Whenthedriverturnedthesteeringwheel,frontandrearwheels,thatcaralmostatthesametimetochangedirection,realizesteeringmovement.

Inturn,the2wscarbeforeactivesteeringwheelrotationjustmakespassivesteering.Obviously,2wscarsinsteeringprocessfromthesteeringwheelrotationtorearwheelsteeringmovementinbetweentheexistenceofcertainlagtime.Thisphaselag2wsautomobilesteeringcharacteristicsmaketheservosexbecomespoor,andthatthecarsteeringradiusincreased.Inaddition,2wscaratahighspeed,thesteeringwheelAnglerelativetocertainincremental,bodyyaw-rateandlateralaccelerationincrementalincreases,madethecaratahighspeedhandlingandstabilitybecomespoor.Andinturn,thecar4wshasdonebefore,rearwheelsteering,activeintheprocessofsteering,highsensitivity,fastresponse,effectivelyovercometheshortcomings.

2.24wsautomobilesteeringway

Accordingtothetheoryanalysisandroadtestshowedthatafour-wheelsteeringcanimprovethemaneuverabilityandsteeringcontrolstabilityofhighspeed,modern4wscarisdevelopedaccordingtotheguidingideology.Generallyspeaking,intheprocessofsteeringcarsin4ws,accordingtodifferentdrivingconditions,frontandrearwheelsteeringAngleshouldfollowcertainrulesbetween.Atpresent,thefront,reartypical4wsdeflectionrulesgenerallyaredescribedbelow:

（a）inversephasesteering

AsshowninfigureA1（a）shows,steeringwheelAngleatlowspeedsorlarger,frontandrearinversephaseshift,realizethattherearwheelswiththefrontdeflectdeflectinstead,andwiththesteeringwheelAngledeflectionAngleincreasesandincreasesinacertainrange.Thisredirectionspeedwaycanimprovethemanipulationofthecar,reduceautomobileportabilityturningradius,makingcarsmaneuverability.Easycarturnedturn,obstacleavoidanceanddriving,garageandparking.Asforcars,ifrearinversephase5°

thenturnedcanreduceminimumsteeringradiuswasabout0.5.

（b）phasewithsteering

AsshowninfigureA1（b）shows,inahigh-speedorsteeringwheelAngleislesser,frontandrearwheelswithphaseshift,realizethattherearwheelsdeflectthedeflectiondirectionwithfrontwheel.Makethecarbodyyaw-rategreatlyreduceautomobilebody,canreducethetendencyofcorneringundergodynamic,guaranteetheovertakingthehighway,elevatedhighway,inandout,intheapproachandflyoversinsufficientsteeringstate.Now,therearemany4wscarstakeimprovingvehiclehandlingperformancefocusesonmakingcarsonhigh-speedsteeringstability,withoutexcessivedemandsinlow-speeddrivingcarcourse-alteringmaneuversflexibility.Thefeaturesislowbyfrontwheelsteeringcaronlywhenonlyincarspeeds,afteruptoacertainvalue,rear,onlyparticipateinsteeringphasewithfour-wheelsteering.

（a）Reverseasteering（b）Coincidentalasteering

FigureA1four-wheelsteeringthefrontofthecar,reardeflectionrule

3.Four-wheelsteeringcarcomponentsandwork