Using of Pacejka tire model within a power two-wheelers multibody model for emergency situations analysis

This paper deals with a numerical modelling of the Powered Two-Wheelers (PTW) dynamic in order to simulate its behaviour during emergency situations. Firstly, a multibody model of a Honda VFR has been developed. It consists of six bodies and eleven degrees of freedom and takes into account the specificities to simulate avoidance and slalom manoeuvres. In order to ensure the stability of the vehicle, special attention is focused on the modelling of tires and suspensions. The model is developed with a classic telescopic fork and swinging arm for suspensions. Concerning tires, to ensure road/tire contact, the Magic Formula tire model of Pacejka adapted to motorcycle is implemented. In parallel, a motorcycle was instrumented to conduct a series of emergency manoeuvres in order to validate the model. The experimental tests have been simulated using the model and results give good correlations showing that the model is well adapted to simulate emergency situations.