The 5-DOF vehicle model employs the classical tire-slip-angle model to elicit the stability characteristics in vehicle handling during chaotic motion.However,the energy is not conserved,and the simulation results do n...The 5-DOF vehicle model employs the classical tire-slip-angle model to elicit the stability characteristics in vehicle handling during chaotic motion.However,the energy is not conserved,and the simulation results do not match actual behavior in that the vehicle should stop having lost balance.We have analyzed the limitations of the classical tire-slip-angle equation,and developed another model,which can be applied to all conditions.To ensure the correct use of the Pacejka’s magic formula for vehicle dynamics,we discuss the differences in tire axis systems between the ISO and adapted SAE(Pacejka),and propose a transformation method relating the two different tire axis systems.Finally,simulations are described that are performed in accordance with the established 5-DOF vehicle system dynamics model.The simulation results show that all states returned to the stable region after the vehicle had lost balance.The process involved energy dissipation,and approaches the response actually experienced.The limitations of the classical tire-slip-angle model are fully displayed and the effectiveness of the proposed slip angle model is demonstrated in unsteady vehicle states.展开更多
基金This research is supported by the project of National Science Foundation China(Grant No.51475199).
文摘The 5-DOF vehicle model employs the classical tire-slip-angle model to elicit the stability characteristics in vehicle handling during chaotic motion.However,the energy is not conserved,and the simulation results do not match actual behavior in that the vehicle should stop having lost balance.We have analyzed the limitations of the classical tire-slip-angle equation,and developed another model,which can be applied to all conditions.To ensure the correct use of the Pacejka’s magic formula for vehicle dynamics,we discuss the differences in tire axis systems between the ISO and adapted SAE(Pacejka),and propose a transformation method relating the two different tire axis systems.Finally,simulations are described that are performed in accordance with the established 5-DOF vehicle system dynamics model.The simulation results show that all states returned to the stable region after the vehicle had lost balance.The process involved energy dissipation,and approaches the response actually experienced.The limitations of the classical tire-slip-angle model are fully displayed and the effectiveness of the proposed slip angle model is demonstrated in unsteady vehicle states.
