| 초록 |
The vehicle\\\'s suspension system effectively prevents irregular input from the road surface generated during driving, thus providing ride comfort to the passenger. The main components of the suspension system are arms, links, rods, springs, and sway bar. In particular, sway bar is used to reduce the roll angle of a vehicle when turning. Various research have been conducted on the active roll control system of vehicles. However, these active systems are very complicated and expensive although they ensure driving safety under different road conditions. Therefore, the semi-active roll stiffness control system using magnetic material-based torque bush is proposed. The required torque is calculated and validated through simulations. The torque bush is designed and manufactured in order to evaluate the performance on torque change. Conditions such as the thickness of magnetic material, rotating frequency, and number of torque bush are taken into account so as to determine the practical application of the proposed torque bush. Furthermore, vehicle dynamic simulation is performed on how the roll stiffness control affects the stability of the vehicle in terms of roll angle change. The correlation between the torque and the thickness, frequency, and number of bushes are determined. The results of this study can be used to design magnetic material-based torque bush for controlling the roll stiffness of a vehicle. |
