Independent modal space control of high speed railway vehicle structure vibration
高速车辆结构振动的独立模态空间控制

The elastic vibration of carbody of high speed or light-weight vehicle not only affects the running quality, but also increaseses the structure stress and reduces the fatigue life of carbody. Based on the flex-rigid multibody system dynamics model of railway vehicle, the independent modal space control(IMSC) algorithm for low frequency vertical bending modal structure vibration control of flexible carbody is examined in this paper. A linear quadratic regulator(LQR) strategy based on the IMSC is proposed to control the special vertical bending structure modal of carbody and to improve the ride comfort of railway vehicle. Simulation results also show that the amplitude of special bending modal vibration of carbody can be lowered and the ride comfort can be improved using this control strategy.