The effect of semi-active suspension on derailment coefficient in railway vehicle

초록

The riding comfort is one of the most important performances in high speed train. Generally the speed up of train will give the passenger worse riding comfort. The semi-active suspension system is good solution for this problem. In this study, the semi-active suspension with MR(Magneto Rheological) damper was considered to improve riding comfort in high speed train. In case of using MR damper the dynamics of railway vehicle is different from that with passive damper. Because the safety is very important item in railway vehicle, the derailment coefficient has to be reviewed when the vehicle dynamics is changed from passive damper case to semi-active damper case. In this study the derailment coefficient of vehicle with MR damper is compared of that with passive damper. The dynamic equations for full model of railway vehicle in lateral direction were built. The MR damper was used instead of lateral passive damper in secondary suspension. By using Matlab-Simulink S/W, the dynamic simulation of railway vehicle was conducted for semi-active suspension system with MR damper. According to some control methods for semi-active suspension with MR damper to improve riding comfort in railway vehicle, the control effect of semi-active suspension system was analyzed and compared with conventional suspension system. Finally, the derailment coefficient was compared between railway vehicle with MR damper and that with passive damper by using the S/W. The effect of semi-active suspension on derailment coefficient in railway vehicle was studied.