Research On Active Yaw Damper Control Of High-Speed Trains

High-speed vehicle is usually installed with yaw damper between the body and the bogie frame to suppress the hunting motion. The characteristic parameters of traditional passive yaw damper can’t adjust with traffic and encourage changed. Although the rotary damp can be increased to improve the operation of the vehicle stability, but the large rotary damper is not conducive to through curve of the vehicle. This paper aiming the relationship between yaw damper’s characteristics and vehicle dynamics performance parameters under different road conditions is simulated analysis. And the active control idea is used to achieve the timely adjustable damping of yaw damper.Using SIMPACK software simulation analyzes the impact of yaw damper’s characteristic parameters for high-speed operation of the vehicle stability, smooth and curving performance. The results show that yaw damper’s characteristic parameters for high-speed operation of the vehicle lateral dynamics performance indicators have a certain influence, no significant effect on the performance of vertical. Through the yaw damper’s series stiffness for dynamics performance of vehicle impact analysis shows that there is an optimal size in the range of stiffness values. Unloading character affected by the dynamics of the vehicle running performance analysis, high-speed train running yaw damper needs to provide greater turning damping stiffness for the vehicle is running straight to inhibit the hunting motion of vehicles. While the vehicle is running along a curved line relatively poor condition of the road when the vehicle speed is relatively low, the vehicle is better by rotating the damping profile is required for a relatively small, but requires optimum rotation damping values there are some differences for different radius curves.Taking into account the equivalent series stiffness of yaw dampers against actually provide damping force exert influence and impact on the dynamic performance of the vehicle is running, it is recommended to select the equivalent series stiffness 6MN/m. From a probability statistical point of view analysis of the relative speed at both ends of the vibration damper and its probability distribution, and to determine the yaw damper unloading speed can be selected to 0.007m/s according to the relative speed of vibration. In the case of determining the equivalent series stiffness and unloading speed, yaw damper is recommended to select the optimum unload force ranges required for optimal dynamic performance of vehicle reached in different road conditions, which can determine the different road conditions required for optimal characteristic parameters of yaw damper. High-speed vehicle yaw damper damping adjustable active control implementation process is analyzed. Through the skyhook control, PID control, optimal control, adaptive control and fuzzy control method for controlling a variety of analysis and comparison, the fuzzy control method is selected to establish a fuzzy controller active yaw damper control system for achieve grade adjustable damping control. SIMPACK with MATLAB/Simulink co-simulation control system model is established to simulation analysis. The run stability and curving performance of high-speed vehicles using fuzzy control yaw damper and conventional high-speed train is comparative analyzed. The results show that the fuzzy control vehicle stability is improved slightly, and the curving performance indicators are qualified to meet the reference standard.