Construction is underway for a 1.62 km-long evacuated tube transportation (ETT) system in Chengdu designed at 1500 km/h. In this work, a novel permanent magnet eddy current brake (PMECB) is delivered to enhance the braking force. First, the structure along with the principle is presented. Second, a double-guideway test bench is employed to compare the dynamic braking characteristics of aluminum and stainless-steel guideways. Guided by experiment findings, a validated periodical simulation model is utilized to investigate the dependence of guideway thickness and material on the braking force associated with braking distances under various speeds. Lastly, optimal guideway configuration is determined through the leapfrogging discrete particle swarm optimization (PSO) algorithm, with the demonstrated global convergence. The results reveal that the braking distance consistently decreases by 15% across the high-speed range, reaching a maximum of 19.5% at 320 km/h. This work presents an alternative braking scheme for the EET system.

中文翻译：

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PMECB 基于速度范围的可变材料和厚度的新型导轨配置

成都正在建设一条长 1.62 公里的真空管道交通 (ETT) 系统，设计时速 1500 公里。在这项工作中，提出了一种新型永磁涡流制动器（PMECB）来增强制动力。首先，介绍了结构和原理。其次，采用双导轨试验台比较铝导轨和不锈钢导轨的动态制动特性。在实验结果的指导下，利用经过验证的周期性仿真模型来研究导轨厚度和材料对与不同速度下的制动距离相关的制动力的依赖性。最后，通过跳跃式离散粒子群优化（PSO）算法确定最佳导轨配置，并具有全局收敛性。结果显示，制动距离在整个高速范围内持续减少 15%，在 320 km/h 时达到最大值 19.5%。这项工作提出了 EET 系统的替代制动方案。