Abstract
Motorcycle stability has been the research subject for a EU sponsored project in the Brite En Ram framework. The other partners were Pirelli, BMW and Marzocchi. A new steady state and a dynamic tyre model have been developed and incorporated in the simulation model at BMW. Steady state measurements were performed with the Delft tyre test trailer on public roads. The MF lyre model has been improved to fit the road measurements accurately at large camber angles and to ensure a consistent behaviour outside the measured domain. Dynamic experiments were carried out on two test rigs: The yaw oscillation and the pendulum lest rig, mounted on top of a rotating drum. Compared to these measurements it shows that the range of application of the simpler stretched string based model is limited due to gyroscopic effects of the tyre belt. A lyre model describing the tyre belt dynamics shows large improvements and is applicable to 25 Hz up to 250 km/h.
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