54汽车操纵稳定性与悬架、转向系

1/812/811.EEEEE3/81DGEFgmsyFrFlFw.L.Force4/81mODGEFdυgυyFmgClFrFC0llFF↓⇒mgFFrr↑⇒OmrollcenterrlFF=rlFF5/81DGlOrOmOCmg6/81mOdυgυDGlOrOCmg7/81mOmO8/81rrddTKΦΦ=dSdQKS=9/81mO'zFzF′ΔrϕΔtSΔsSΔQΔQ2uGsGmnssuszkSQGGFΔΔ=+=)(21'tsss'zss'ztsstrS)nm(kSnmkFmSkQmnFSnmSmSnSΔΔΔΔΔΔΔΔΔΔϕΔ2=======t-tires-springSmum22)nm(kSFkst'zl==ΔΔ10/81t2sss'zss'ztsstrS)nm(kSnmkFmSkQmnFSnmSmSnSΔΔΔΔΔΔΔΔΔΔϕΔ=======mO'zFzF′ΔrϕΔtSΔsSΔQΔQ2uGsGmnSGuG22)nm(kSFkst'zl==ΔΔS;SprungU:Unsprung11/81mO'zFzFδrδϕtSδsSδQδQ2uGsGmnssuszkSQGGFδδ=+=)(21'mSnSstrδδδϕ==0)()2''=+−+stzuzSQQSFGFδδδδ222)SS(kkSSSkSkSSQFSQSFtssltssstlts'zst'zδδδδδδδδδδδδδδ====nm12/8122)(⎟⎠⎞⎜⎝⎛==′nmkSSkkstsslδδ222)(212121nBmkBkKdBkdTslrrl=′=Φ′=ΦrdBΦ2rdΦBrdΦrdBdsΦ2≈dskdQl′=2222BdBkBdQdTrlΦ′==221BkKlr′=ΦdQdQmOrrddTKΦΦ=13/81AAΦωΦΦA∑∑ΦΦΦΦ=ΦrrrrrKTKTf),(rΦ