基于自适应终端滑模控制的高速列车精准停车控制

Precise Stopping Control of High-speed Trains Based on Adaptive Terminal Sliding Mode Control

  • 摘要:
    目的 高速列车精准停车是保障列车运行安全与效率的关键。面对开放多变的运行环境、制动系统时延及电-空联合特性等复杂因素,现有自动停车方法难以满足±0.15 m的高精度要求。因此,有必要建立一种适应多种干扰的高速列车精准停车控制方法。
    方法 建立了包含动力学与制动系统的精细化模型,分别构建了电制动惯性环节和空气制动时延模型。针对列车运行中的基本阻力、附加阻力及制动特性偏差等内外干扰进行了建模。在此基础上,结合终端滑模控制理论,设计了RTSMC(精细化终端滑模控制)方法。在引入参数自适应策略与模糊控制后,构建了ARTSMC(自适应终端滑模控制)方法,并通过Lyapunov稳定性理论设计了参数自适应律,利用模糊规则动态调节切换增益。
    结果及结论 仿真结果表明:ARTSMC方法在一般干扰场景下,停车误差为0.063 1 m,停车精度提升了73.25 %;在恶劣场景下,仍可保持0.139 4 m的停车精度。基于京张线(北京—张家口)实际数据的批量仿真,进一步验证了各路段停车误差均小于0.130 0 m。所设计的控制方法在复杂环境下具备优越的停车精度、鲁棒性与乘客舒适性,为高速列车精准停车提供了有效解决方案。

     

    Abstract:
    Objective Precise stopping of high-speed trains is crucial to ensuring operational safety and efficiency. In the presence of complex factors such as open and variable operating environments, braking system time delays, and electro-pneumatic combined characteristics, existing automatic stopping methods have difficulty meeting the high-precision requirement of ±0.15 m. Therefore, it is necessary to establish a high-speed train precision stopping control method capable of adapting to multiple disturbances.
    Method A refined model incorporating both dynamics and braking system is established, in which the inertial link of electric braking and the delay model of pneumatic braking are constructed, respectively. Internal and external disturbances during train operation, including basic resistance, additional resistance, and braking characteristic deviations, are modeled. On this basis, combined with terminal sliding mode control theory, an RTSMC (refined terminal sliding mode control) method is designed. By introducing a parameter adaptive strategy and fuzzy control, an ARTSMC (adaptive refined terminal sliding mode control) method is developed. The parameter adaptative law is designed using Lyapunov stability theory, and the switching gains is dynamically adjusted using fuzzy rules.
    Result & Conclusion  Simulation results show that under general disturbance scenarios, the stopping error is 0.0631 m, and the stopping accuracy is improved by 73.25 % using ARTSMC method; while under severe scenarios, a stopping accuracy of 0.139 4 m can still be maintained. Batch simulations based on actual data from the Beijing–Zhangjiakou High-speed Railway further verify that the stopping error at all sections is less than 0.130 0 m. The proposed ARTSMC method demonstrates superior stopping accuracy, robustness, and passenger comfort in complex environments, providing an effective solution for precision stopping of high-speed trains.

     

/

返回文章
返回