Abstract
In this paper, a model of in-wheel motor and tire system has been established to analyze numerically the dynamic feature in time domain and frequency domain, from the viewpoint of vehicle longitudinal motion analysis. The model consists of two sub-models, permanent magnet synchronous motor (PMSM) model and transient rigid-ring tire dynamics model. As the simulation results show the electric current measurement error and non-sinusoidal magnetic field distribution can cause motor torque ripple. The vehicle velocity, vertical load, tire sidewall damping and stiffness coefficients can influence the transient response of the tire. It is found from the frequency analysis results that there exist two major resonant regions and the vibration amplitude in the first resonant region is dominant. The dynamics response is greatly affected by vehicle velocity and vertical load.
