ABSTRACT

Active steering technology is an effective method to solve the contradiction between curving performance and running stability of traditional bogie. In this study, an integrated active steering device was developed to integrate wheelset constraints and actuators. In addition, to study the minimum wear number control strategy, the existence of an optimal steering level that minimises the wear number was corroborated by a theoretical derivation based on the single wheelset model. Later, this research method was extended to the complete vehicle lateral dynamics model and steady-state solutions at different active steering levels were analysed. The results demonstrate that at optimal steering control, wear number is the lowest. This state is less affected by the running velocity, stiffness of the primary suspension, tread taper, and creep state, which are determined by the wheelbase and track curvature. The lateral forces of rail-vehicle wheels with an active steering function at different steering levels were measured using instrumented wheelsets. Furthermore, the accuracy of the simulation model was verified by comparing the experimental data with simulation results. Finally, the wear number of test vehicles at different steering levels were predicted using this model, and the control strategy proposed in this investigation was validated.

摘要

主动转向技术是解决传统转向架转弯性能与运行稳定性矛盾的有效方法。在这项研究中，开发了一种集成主动转向装置来集成轮对约束和执行器。此外，为了研究最小磨损数控制策略，基于单轮对模型的理论推导证实了最小化磨损数的最佳转向水平的存在。后来，将该研究方法扩展到整车横向动力学模型，并分析了不同主动转向水平下的稳态解。结果表明，在最佳转向控制下，磨损次数最低。这种状态受运行速度、主悬架刚度、胎面锥度和蠕变状态的影响较小，这是由轴距和轨道曲率决定的。使用仪表轮对测量在不同转向水平下具有主动转向功能的轨道车辆车轮的侧向力。此外，通过将实验数据与仿真结果进行比较，验证了仿真模型的准确性。最后，使用该模型预测了不同转向水平下测试车辆的磨损次数，并对本研究中提出的控制策略进行了验证。