基于离心式作动器的地铁车辆蛇行运动的抗扰控制研究

Active Control of Metro Vehicle Hunting Motion Based on Centrifugal Actuator

  • 摘要: 针对地铁车辆长期服役过程中蛇行稳定性恶化的问题,提出了一种基于离心式作动器的主动控制系统设计方法。首先,基于离心式作动器的工作原理,确定其在地铁车辆转向架上安装布局和作动方式,最终确定“对角双执行器”构型,以实现转向架横移与摇头振动的同步主动抑制。然后,将工程实际方便测量的转向架端部加速度信号作为反馈,结合PID控制器和希尔伯特变换处理,设计主动控制系统。利用SIMPACK和Simulink分别建立了动力学模型和控制系统模型,并进行了联合仿真分析。结果表明,离心式作动器在控制地铁蛇行运动稳定性上具有良好的可行性,相比于无主动控制的转向架端部加速度RMS值降低了29.65%,在特别关注的0.5-10 Hz频段内,2-5 Hz频段幅度均降低明显,其中4.8 Hz的功率谱密度幅值降低最为显著,达到87.60%。

     

    Abstract: Aiming at the problem of deteriorated hunting stability of metro vehicles during long-term service, this paper proposes a design method of an active control system based on centrifugal actuators. First, based on the working principle of centrifugal actuators, their installation layout and actuation mode on the bogie of metro vehicles were determined, and the diagonal dual-actuator configuration was finally adopted to realize the synchronous active suppression of bogie lateral displacement and yaw vibration. Then, the bogie end acceleration signal, which is convenient to measure in engineering practice, was used as feedback, and an active control system was designed by combining PID controller and Hilbert transform processing. The dynamic model and control system model were established by SIMPACK and Simulink respectively, and co-simulation analysis was carried out. The results show that the centrifugal actuator has good feasibility in controlling the hunting stability of metro vehicles. Compared with the bogie without active control, the root mean square (RMS) value of the bogie end acceleration is reduced by 29.65%. In the specially concerned frequency band of 0.5–10 Hz, the amplitude in the 2–5 Hz frequency band is significantly reduced. Among them, the amplitude of the power spectral density (PSD) at 4.8 Hz is the most significantly reduced, reaching 87.60%.

     

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