Bogie active stability simulation and scale rig test based on frame lateral vibration control

This paper puts forward a high-speed train bogie active stability method, based on frame lateral vibration control, for improving the stability and critical speed of railway vehicles at high speeds. Two inertial actuators apply active control forces to the front and rear end beams of the bogie frame. A scale model of bogie lateral dynamics is established, as well as the state space equation of the control system. Also, the multi-objective optimization is used to construct state feedback parameters, which take hunting stability and control effort into account. Furthermore, the effects of time-delay in the control system and suspension parameters on bogie hunting stability are studied. The dynamic behaviors and the stability mechanism of the bogie control system are analyzed. Finally, a 1:5 scale test rig is used to conduct a bogie active stability experiment. The results reveal that active control of frame lateral vibration can effectively improve the bogie system’s hunting stability margin at high speeds, but time-delay in the control system cannot be ignored.