adams懸架性能分析

1、Adams/car 的懸架分析(SuspensionAnalyses),共提供懸架 38 種性能。對所有懸架均提供：-SteerandCamberCompliance/單位回正力矩的轉角或CamberAngle/外傾角CasterAngle/后傾角DiveBraking/LiftBraking/制動點頭/制動抬頭Fore-AftWheelCenterStiffness/懸架縱向剛度Front-ViewSwingArmLengthandAngle/前視圖（虛擬）擺臂長度和角度KingpinInclinationAngle/主銷內(nèi)傾角LateralForce-Deflection,Steer,an

2、dCamberCompliance/?Lift/SquatAcceleration/抬頭(一般指啟動時前懸架抬升，后懸架壓縮)?PercentAnti-DiveBraking/PercentAnti-LiftBraking/（前懸架）防點頭/（后懸架）防抬升PercentAnti-LiftAcceleration/PercentAnti-SquatAcceleration/?AligningTorque外傾角?RideRate/懸架動剛度?RideSteer/懸架轉向性能?RollCamberCoefficient/側傾輪傾系數(shù)（車身側傾時車輪側傾角與車身側傾角的比值）RollCasterCo

3、efficient/RollCenterLocation/側傾中心位置?RollSteer/Ridesteeristheslopeofthesteerangleversustheverticalwheeltravelcurve.Ridesteeristhechangeinsteerangleperunitofwheelcenterverticaldeflectionduetoequalverticalforcesatthewheelcenters.Positiveridesteerimpliesthatthewheelssteertotheright,asthewheelcentersmove

4、upward.?Side-ViewAngle/Theside-viewangleisthewheelcarrierside-viewrotationangle.Itispositiveforaclockwiserotation,asseenfromtheleftsideofthevehicle.?Side-ViewSwingArmLengthandAngle/Theswingarmisanimaginaryarmextendingfromthewheelssideelevationinstantcenterofrotationtothewheelcenter.Forfrontsuspensio

5、ns,thesignconventionisthatwhentheinstantcenterisbehindthewheelcenter,theswingarmhasapositivelength.Forrearsuspensions,thesignconventionistheopposite:whentheinstantcenterisaheadofthewheelcenter,theswingarmhasapositivelength.Theangleoftheswingarmistheangleitmakestothehorizontal.Apositiveangleforaposit

6、ivelengthiswhenthearmslopesdownwardfromthewheelcenter.Apositiveangleforanegativelengtharmiswhenthearmslopesupwardfromthewheelcenter.SuspensionRollRate/懸架側傾剛度ToeAngle/前束角TotalRollRate/總側傾剛度?WheelRate/懸架剛度對轉向懸架還提供:?Ackerman/Ackermanisthedifferencebetweentheleftandrightwheelsteerangles.ApositiveAckerma

7、nindicatesthattherightwheelisbeingsteeredmoretotherightthantotheleft.?AckermanAngle/Ackermanangleistheanglewhosetangentisthewheelbasedividedbytheturnradius.Ackermanangleispositiveforrightturns.?AckermanError/AckermanerroristhedifferencebetweenthesteerangleandtheidealsteerangleforAckermangeometry.Bec

8、auseAdams/Carusestheinsidewheeltocomputetheturncenter,theAckermanerrorfortheinsidewheeliszero.Foraleftturn,theleftwheelistheinsidewheelandtherightwheelistheoutsidewheel.Conversely,forarightturn,therightwheelistheinsidewheelandtheleftwheelistheoutsidewheel.PositiveAckermanerrorindicatestheactualsteer

9、angleisgreaterthantheidealsteerangleortheactualissteeredmoretotheright.?CasterMomentArm(MechanicalTrail)/Castermomentarmisthedistancefromtheintersectionofthekingpin(steer)axisandtheroadplanetothetirecontactpatchmeasuredalongtheintersectionofthewheelplaneandroadplane.Castermomentarmispositivewhenthei

10、ntersectionofthekingpinaxisandroadplaneisforwardofthetirecontactpatch.?IdealSteerAngle/IdealsteerangleisthesteerangleinradiansthatgivesAckermansteergeometryor100%Ackerman.ForAckermansteergeometry,thewheel-centeraxesforallfourwheelspassthroughtheturncenter.NotethatAdams/Carusesthesteerangleoftheinsid

11、ewheeltodeterminetheturncenterforAckermangeometry.Therefore,theidealsteerangleandthesteerangleareequalfortheinsidewheel.Whenmakingaleftturn,theleftwheelistheinsidewheel.Conversely,whenmakingarightturn,therightwheelistheinsidewheel.Apositivesteerangleindicatesasteertotheright.?OutsideTurnDiameter/Out

12、sideturndiameteristhediameterofthecircledefinedbyavehiclesoutsidefronttirewhenthevehicleturnsatlowspeeds.Adams/Cardeterminesthecirclebythetirescontactpatchforagivensteerangle.Foraleftturn,therightfrontwheelistheoutsidewheel.Forarightturn,theleftfrontwheelistheoutsidewheel.?PercentAckerman/PercentAck

13、ermanistheratioofactualAckermantoidealAckermanexpressedasapercentage.PercentAckermanislimitedtotherangefrom-999%to999%.PercentAckermanispositivewhentheinsidewheelssteerangleislargerthantheoutsidewheelssteerangle.?ScrubRadius/Scrubradiusisthedistancefromtheintersectionofthekingpin(steer)axisandtheroa

14、dplanetothetirecontactpatchmeasuredalongtheprojectionofthewheel-centeraxisintotheroadplane.Scrubradiusispositivewhentheintersectionofthekingpinaxisandtheroadplaneisinboardofthetirecontactpatch.?SteerAngle/Rollsteeristhechangeinsteerangleperunitchangeinrollangle,ortheslopeofthesteer-angle-verses-roll

15、-anglecurve.Rollsteerispositivewhenforincreasingrollangle(leftwheelmovingup,rightwheelmovingdown)thesteerangleincreases(wheelssteertowardtheleft).?SteerAxisOffset/Thesteeraxisoffsetistheshortestdistancefromthesteer(kingpin)axistothewheelcenter.Thesteeraxisoffsetismeasuredintheplaneperpendiculartothe

16、steeraxisandpassingthroughthewheelcenter.Thesteeraxisoffsetisalwayspositive.Thesteeraxisoffset-longitudinalisthecomponentofthesteeraxisoffsetalongtheintersectionofthewheelplanewiththeplaneperpendiculartothesteeraxisandpassingthroughthewheelcenter.Thesteeraxisoffsetlongitudinalispositivewhenthewheelcenterisforwardofthesteeraxis.Thesteeraxis