DOI QR코드

DOI QR Code

Study of the Capsule Train Ride Comfort Improvement by using the Damping Control in Suspension System

현가장치 내 감쇠 제어를 이용한 캡슐트레인 승차감 향상 연구

  • Lee, Jin-Ho (New Transportation Innovative Research Center, Korea Railroad Research Institute) ;
  • Lim, Jungyoul (New Transportation Innovative Research Center, Korea Railroad Research Institute) ;
  • You, Won-Hee (New Transportation Innovative Research Center, Korea Railroad Research Institute) ;
  • Lee, Kwansup (New Transportation Innovative Research Center, Korea Railroad Research Institute)
  • 이진호 (한국철도기술연구원 신교통혁신연구소) ;
  • 임정열 (한국철도기술연구원 신교통혁신연구소) ;
  • 유원희 (한국철도기술연구원 신교통혁신연구소) ;
  • 이관섭 (한국철도기술연구원 신교통혁신연구소)
  • Received : 2020.09.02
  • Accepted : 2020.10.05
  • Published : 2020.10.31

Abstract

In this study, damping control devices were applied to the suspension system of a capsule train, and the effects were investigated to improve the ride comfort. The superconductor electrodynamic suspension (SC-EDS) method is used for the capsule train levitation. This method has advantages such as no gap control and a large gap. However, the SC-EDS method has disadvantages such as large gap variation and small damping characteristics against outer vibration, which causes degradation of the ride comfort. In this study, the damping control devices in the primary and secondary suspension were considered to improve the ride comfort in the capsule train. Damping control devices in the primary and secondary suspension can reduce the vibration transmission from outer disturbances to the bogie and from the bogie to the car body, respectively. Simulations for dynamic characteristics analyses were conducted based on the capsule train dynamic model to investigate the effects of the damping control devices on the ride comfort. As a result, it was confirmed that the ride comfort requirements according to the ISO standard can be satisfied by applying the damping control in the capsule train suspension.

본 연구에서는 캡슐트레인의 승차감 향상을 위하여 캡슐트레인 모델 내의 현가장치에 감쇠 제어 장치를 적용하고 그 효과를 검토하였다. 캡슐트레인의 부상 방식으로 사용되는 초전도 유도 반발식 부상은 별도의 부상제어가 필요 없고 부상 공극이 큰 장점이 있다. 하지만, 본 부상 방식은 공극 변화량이 크고 외부로부터 유입되는 진동에 대한 작은 감쇠 특성으로 인해 캡슐트레인의 승차감을 저하시키는 단점이 있다. 본 연구에서는 캡슐트레인의 승차감 향상을 위해서 1차 및 2차 현가장치 내에 적용되는 감쇠 제어 장치를 고려하였다. 1차 현가장치에 적용되는 감쇠 제어 장치는 외란에 의해 발생하는 진동이 대차로 전달되는 것을 감소시키는 역할을 하고, 2차 현가장치 적용되는 감쇠 제어 장치는 대차의 진동이 차체로 전달되는 것을 감소시키는 역할을 한다. 감쇠 제어가 승차감에 미치는 효과를 검토하기 위하여 캡슐트레인 모델을 기반으로 한 동특성 해석 시뮬레이션을 수행하였다. 검토 결과, 현가장치 내 감쇠 제어를 통해 ISO 기준의 승차감 규격을 만족할 수 있음을 확인하였다.

Keywords

References

  1. Core technology development of subsonic capsule train, Annual Report. Korea Railroad Research Institute, Korea, 2018.
  2. E. Musk, Hyperloop Alpha. White paper, 2014.
  3. H. James, "Technical assessment of maglev system concepts," US army corps of engineers. 1998.
  4. J. He, H. Coffey, "Magnetic damping forces in figure-eight-shaped null-flux coil suspension systems," IEEE Transactions on Magnetics, 33(5), pp.4230-4232, 1997. https://doi.org/10.1109/20.619719
  5. K. Higashi, S. Ohashi, H. Ohsaki, E. Masada, "Magnetic damping of the electrodynamic suspension-type superconducting levitation system," Electr. Eng. JPN., 127(2), pp.49-60, 1999. DOI: http://dx.doi.org/10.1002/(SICI)1520-6416(19990430)127:2%3C49::AID-EEJ7%3E3.0.CO;2-X
  6. H. Claus, W. Schiehlen, "Modeling and simulation of railway bogie structural vibrations," J Vehicle System Dynamics, 29(S1), pp.538-552, 1998. DOI: https://doi.org/10.1080/00423119808969585
  7. K. Watanabe, H. Yoshioka, E. Suzuki, T. Tohtake, M. Nagai, "A Study of Vibration Control Systems for Superconducting Maglev Vehicles(Vibration Control of Lateral and Rolling Motions)," Journal of System Design and Dynamics, 1(3), pp.593-604, 2007. DOI: https://doi.org/10.1299/jsdd.1.593
  8. E. Suzuki, J. Shirasaki, K. Watanabe, H. Hoshino, M. Nagai, "Vibration reduction methods for superconducting Maglev vehicles." In Proceedings of the 8th World Congress on Railway Research (WCRR 2008), 2008.
  9. T. Yamamoto, T. Murai, H. Hasegawa, H, Yoshioka, S. Fujiwara, S, Hatsukade, "Development of Distributed-type Linear Generator with Damping Control," Quarterly Report of Rtri. 41. pp.83-88, 2000. DOI: https://doi.org/10.2219/rtriqr.41.83
  10. How Does an MR Damper Work? [Internet]. Parker LOAD, https://www.lord.com/products-and-solutions/activevibration-control/industrial-suspension-systems/howdoes-mr-damper-work (accessed Aug. 31, 2020)
  11. ISO 2631-1. Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration - Part 1: General requirements. International Organization for Standardization. 1997.