轨道非平稳不平顺激扰下高速列车半主动控制研究

Research on Semi Active Control of High Speed Train Under Track Non-Stationary Irregularity

为改善轨道非平稳随机不平顺对列车动力学性能的影响,基于高速列车线路运行的重复性以及周期性,采用变步长迭代寻优控制算法,建立高速列车抗蛇行减振器半主动变阻尼控制系统,以转向架横向加速度峰值为目标函数,不断迭代寻找最有利于列车动力学性能的减振器阻尼值,改善了传统列车定阻尼值的弊端。多体动力学软件和控制系统仿真软件相结合联合仿真,仿真分析表明,轨道非平稳随机不平顺会使得车体和构架横向加速度、轮对横向力以及轮轨磨耗以倍数增加,严重影响列车动力学性能;通过变阻尼控制之后,构架横向加速度、轮对横向力以及轮对磨耗明显减小,车体横向加速度也略有减小,能够改善列车动力学性能,提高列车运行安全性与平稳性。

In order to improve the effects of the track non-stationary random irregularity on the dynamic performance of the train, based on the repetition and periodicity of high-speed train in line running , the semi active variable damping control system of high speed train yaw damper was established by the variable-step iterative optimization control algorithm, taking the peak of the lateral acceleration of the bogie as the objective function, to find the dampering value which was the most beneficial to train dynamic performance, and to improve the disadvantages of the traditional train fixed damping value. By combining multi body dynamics software with simulation software of control system, simulation results show that track non-stationary random irregularity made the train body and frame lateral acceleration, wheel lateral force and the wheel rail wear increased by multiples, and seriously affected the dynamic performance of the train. Then, the lateral acceleration, wheel lateral force and the wheel wear was significantly reduced, the lateral acceleration of train body also was decreased slightly after the variable damping control. So the control can improve the dynamic performance of the train and improve the safety and stability of the train.