AWD 시스템 탑재 차량의 모델링 및 시뮬레이션

AWD system means it delivers drive force to all wheels so that it can help vehicle escape low mu surface or climb hill more conveniently. With the growing concern for vehicle safety issues, application of AWD is not only focusing on vehicle performance but also vehicle safety. To design AWD vehicle control logic, AWD system modeling which has similar simulations results of real AWD vehicle is crucial. This paper describe how to model transfer case which is a mechanical device to transfer some portion of torque of main drive shaft to sub drive shaft. Especially, wet clutch type model which can control the amount of torque distribution by allowing clutch slipping is introduced. To verify the feasibility of transfer case model, Carsim/Simulink based AWD system simulation results of vehicle which is based on RWD will be presented.