Refined disturbance observer based prescribed performance fixed-time control of high-speed EMS trains with track irregularities

High-speed Railway Pub Date : 2023-09-01 DOI:10.1016/j.hspr.2023.09.001

Yiran Xie, Boyang Zhao, Xiuming Yao

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Abstract

High-speed Electromagnetic Suspension (EMS) train is continuously impacted by the irregularity of the track, which worsens the levitation performance of the train. In this paper, a composite control scheme for the EMS is proposed to suppress track irregularities by integrating a Refined Disturbance Observer (RDO) and a Prescribed Performance Fixed-Time Controller (PPFTC). The RDO is designed to estimate precisely the track irregularities and lumped disturbances with uncertainties and exogenous disturbances in the suspension system, and reduce input chattering by applying to the disturbance compensation channel. PPFTC is designed to converge the suspension air gap error to equilibrium point with prescribed performance by completing error conversion, and solve the fast dynamic issue of EMS. And the boundary of overshoot and steady-state is limited in the ranged prescribed. A theoretical analysis is conducted on the stability of the proposed control method. Finally, the effectiveness and reasonability of the proposed composite anti-disturbance control scheme is verified by simulation results.

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基于扰动观测器的轨道不平整高速EMS列车预定性能定时控制

高速电磁悬浮列车不断受到轨道不平顺性的冲击，使列车的悬浮性能恶化。本文提出了一种结合精细干扰观测器(RDO)和规定性能固定时间控制器(PPFTC)的EMS复合控制方案来抑制航迹不规则性。RDO可以精确估计悬架系统中的轨道不规则性、不确定性集总干扰和外源干扰，并通过应用于干扰补偿通道来减小输入抖振。PPFTC通过完成误差转换，将悬架气隙误差收敛到具有规定性能的平衡点，解决了EMS的快速动态问题。超调和稳态的边界限定在规定的范围内。对所提控制方法的稳定性进行了理论分析。最后，仿真结果验证了所提复合抗干扰控制方案的有效性和合理性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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High-speed Railway

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