DOI QR코드

DOI QR Code

Dynamic Analysis of Monorail System with Magnetic Caterpillar

자석식 무한궤도를 가진 모노레일의 동역학 해석

  • Won, Jong-Sung (Devision of Mechanical and Mechatronics Engineering, Kangwon National University) ;
  • Tak, Tae-Oh (Department of Mechanical and Biomedical Engineering, Kangwon University)
  • 원종성 (강원대학교 대학원 기계메카트로닉스공학부) ;
  • 탁태오 (강원대학교 기계의용공학과)
  • Received : 2011.04.13
  • Accepted : 2011.09.22
  • Published : 2012.03.01

Abstract

This work deals with dynamic analysis of a monorail system with magnetic caterpillar where magnets are embedded inside each articulated element of the caterpillar, augmenting traction force of main rubber wheels to climb up slope up to 15 degree grade. Considerations are first given to determine stiffness of the primary and secondary suspension springs in order for the natural frequencies of car body and bogie associated with vertical, pitch, roll and yaw motion to be within generally accepted range of 1-2 Hz. Equations for calculating magnetic force needed to climb up given slope are derived, and a magnetic caterpillar system for 1/6 scale monorail is designed based on the derivation. To assess the hill climbing ability and cornering stability, and make sure smooth operation of the side and vertical guiding wheels which is critical for safety, a multibody model that takes into account of every component level design characteristics of car, bogie, and caterpillar is set up. Through hill climbing simulation and comparison with measurement of the limit slope, the validity of the analysis and design of the magnetic caterpillar system are demonstrated. Also by studying the curving behavior, maximum curving speed without rollover, functioning of lateral motion constraint system, the effects of geometry of guiding rails are studied.

Keywords

References

  1. Y. O. Kim, "A Study on Monorail Station as a New City Infra - Based on the Yoido KBS Station Planning-," M. S. Thesis, Kyunghee University, Gyeonggi, Korea, 2007.
  2. 특허 제10-0702617호: 레일카트시스템 및 레일 트랙시스템
  3. CATIA, www.3ds.com/products/catia/welcome
  4. Size Korea, Report of 5th Korean Physical Size Measurements, The Ergonomics Society of Korea, Ministry of Knowledge Economy, Korean Agency for Technology and Standards, 2004.
  5. RecurDyn Training Guide, CMET Co. Ltd.
  6. K.-S. Jeon, U. S. Lee and S.-H. Yun, "Dynamics of an AGT System Light Rail Transit with Rubber Tires," M. S. Thesis, Inha University, Incheon, Korea, pp.135-142, 2000.
  7. S. Dakeshi, Railroad Vehicle and Design Technology, Gijunyungu-sa, Seoul, 2005.
  8. J. T. Kim and T. S. Oh, "Characteristic of High Friction on Using Urethane and Particle Rubber," Research Journal of RIST, Vol.16, No.3, pp.292-298, 2002.
  9. T. D. Gillespie, Fundamentals of Vehicle Dynamics, SAE, Warrendale, 1992.