Skyhook control of secondary suspension of railway vehicle for improving ride comfort

초록

The maximum speed becomes the most important performance in high speed train. But the riding comfort becomes worse according to speed up of train. The semi-active suspen-sion system by using variable damper with hydraulic solenoid valve is used to solve this problem. But the variable damper with hydraulic solenoid valve requires tank for supplying fluid. In this study, the MR(Magneto Rheological) damper was considered instead of hydraulic variable damper in order to improve riding comfort. The dynamic equations on full model of railway vehicle in lateral direction were built. The MR damper was used instead of lateral damper in secondary suspension. Dynamic simulation was conducted for semi-active suspension system with MR damper was made by using skyhook control. To verify improvement of riding comfort by MR damper using skyhook control, 1/5 scaled railway vehicle model was produced. The lateral carbody vibration level of the railway vehicle with semi-active suspension system was analyzed theoreticaly and experimentally. The effect of semi-active suspension system of railway vehicle with skyhook control was verified by experiment with 1/5 scaled railway vehicle model.