Electronic inertia design for in-wheel-drive system to improve off-road dynamic performance

Due to the low inertia, low damp, and high stiffness, in-wheel-drive system has vibration problems, especially under off-road conditions. Mechanical approaches such as applying additional inertia to wheels can effectively reduce the torsional vibration, however, that increases unsprung mass and brings more severe vertical vibration. In this article, electronic inertia is designed for the system to realize the same function of mechanical inertia. Joint simulation is conducted between Carsim and Matlab/Simulink, which shows that this method can suppress the torsional vibration to a satisfying level without extra cost.