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为了抑制由高速车体摇头引起的车体横向振动,构造了高速列车横向半主动悬挂系统模糊控制结构,采用模糊控制策略,以减振器的实际阻尼力和车体、构架的横向振动加速度为反馈输入,对车体前后横向悬挂系统的可调减振器进行双闭环反馈独立控制。以美国六级轨道谱为输入,在列车运行速度为270km.h-1时,结合表征列车悬挂系统横向振动特征的17自由度动力学模型,对半主动悬挂机车和被动悬挂机车的横向振动、摇头振动进行计算。计算结果表明:采用半主动悬挂的高速车体平稳性改善了12.54%,摇头振动幅值减少了35.00%,横向振动幅值减少了48.45%,在车体固有频率(1～6Hz)附近,车体横向振动、摇头振动抑制达到50%。可见,该控制结构和控制策略能够明显抑制车体横向振动。
In order to restrain the lateral vibration of the vehicle body caused by shaking head of high-speed body, the fuzzy control structure of transverse semi-active suspension system for high-speed train is constructed. The fuzzy control strategy is adopted to calculate the actual damping force of the shock absorber and the lateral acceleration of vehicle body and frame as Feedback input, the front and rear body suspension system adjustable shock absorber dual closed-loop feedback independent control. Based on the six-level orbit spectrum of the United States, the 17-DOF kinetic model is used to characterize the lateral vibration characteristics of the suspension system of the train when the train speed is 270km.h-1. The lateral vibration of the semi-active and passive suspension locomotives is analyzed. Shook his head vibration calculation. The results show that the stability of the high-speed vehicle body with semi-active suspension is improved by 12.54%, the vibration amplitude of shaking head is reduced by 35.00% and the lateral vibration amplitude is reduced by 48.45%. In the vicinity of natural frequency of vehicle body (1 ~ 6Hz) Body lateral vibration, shake the head vibration suppression of 50%. Can be seen that the control structure and control strategy can significantly inhibit the body lateral vibration.