Wheel Dynamics

Abstract: The dynamics of the wheel rotation is mainly influenced by the driving or the braking torque and the longitudinal tire force. Today different tire models are available. Structural tire models are very complex. Here, the dynamics of the wheel rotation is dominated by the complex tire model. Within handling models, the steady state tire forces and torques are generated as functions of the longitudinal and lateral slip. Depending on the slip definition the dynamics of a wheel depends now on the vehicle velocity or the angular velocity of the wheel. Here, the wheel dynamics will become more and more stiff if the vehicle slows down or the wheel is close to a locking situation. This causes problems in drive away and braking to stand still maneuvers. In this paper a simple quarter car model is used to study the wheel dynamics. Different model approaches and the performance of explicit and implicit ode solvers are investigated.