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http://dx.doi.org/10.17661/jkiiect.2020.13.5.443

Implementation and Performance Evaluation of a Precision Localizing Device for Hyperloop Pods Driving at Ulta-High Speeds  

Ok, Min-Hwan (Dept. of HTX research team, Korea Railroad Research Institute)
Choi, Su-Yong (Dept. of HTX research team, Korea Railroad Research Institute)
Choe, Jae-Heon (Dept. of HTX research team, Korea Railroad Research Institute)
Lee, Kwan-Sup (Dept. of HTX research team, Korea Railroad Research Institute)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.13, no.5, 2020 , pp. 443-451 More about this Journal
Abstract
A futuristic locomotion system called Hyperloop is projected for driving at ulta-high speed, levitated in the tube. In hyperloop localization of pods on the linear synchronous motor is essential for pod driving. precision localization is required for acceleration and deceleration of pods driving at speed above 1,000km/h, and also required for adjusting the pod speed driving at this very-high speed to maintain inter-vehicle distance. In this work, a new scale of localization is challenged by modified laser surface velocimeter. In acceleration the speed of a virtual pod is calculated along its displacement measured by laser reflection. Under the requirement of precise localization of the pod driving at ultra-high speed, a displacement measurement device, which detects the difference in reflections from tiles passing by the pod, is developed and evaluated through performance test. Tests of pod speeds below 500km/h have showed exact localization results of the precision in centimeters, and tests of pod speeds above 500km/h have showed localization with very low error rates under 0.1%. For the measurement above 500km/h, future works would pursue the error rate converges to zero.
Keywords
Hyperloop; Linear synchronous motor; Localization; Laser surface velocimeter; Relative distance;
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