Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Compact MR fluid Brake for the Training and Sporting Equipment for Leg Rehabilitation

하지 재활운동치료 기구에 적용하기 위한 소형 MR 유체 브레이크에 관한 연구

  • 박우철 (강원대학교 자동차공학과) ;
  • 이현창 (강원대학교 자동차공학과) ;
  • 김일겸 (첨단기공(주) 부설연구소)
  • Received : 2012.02.13
  • Accepted : 2012.07.12
  • Published : 2012.07.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the training and sporting equipment for leg rehabilitation featuring the MR fluids is proposed. The compact MR fluid brake is designed and manufactured to apply to the rehabilitation training and sporting mechanism. The resistance characteristic of the MR fluid brake is controllable by varying the magnetic field around the fluid. Under consideration of spatial limitation, design parameters which are related with the magnetic strength are determined to maximize to a torque using finite element method. The FE analysis is performed using a commercial code, ANSYS Workbench. The proposed brake device is manufactured, and its field-dependant torque is experimentally evaluated. When the electric current is supplied, the torque of the MR fluid brake is increased and the response is very fast. Depending on the strength of the current supply, torques of the MR fluid brake also increase similar to Bingham property of MR fluid.

본 연구에서는 MR유체를 특징으로 하는 하지 재활운동 기구를 제안하고, 재활운동 기구에 적용하기 위한 소형 MR 유체 브레이크를 설계, 제작하여 성능을 평가하였다. MR유체 브레이크의 저항 특성은 MR유체에 부하되는 자기장의 변화에 의해 제어된다. 공간 제한을 고려하여 자기장 세기와 관련된 설계변수는 유한요소 프로그램인 ANSYS Workbench를 사용하여 최대 토오크가 발생할 수 있도록 결정하였다. 제안된 MR유체 브레이크를 제작하고, 자기장에 따른 토오크의 변화를 실험적으로 평가하였다. 전류를 공급하면, MR 유체 브레이크의 토오크는 증가하였으며, 그 반응은 매우 빠르게 나타났다. 공급하는 전류의 세기가 증가함에 따라 MR 유체 브레이크의 토오크는 MR유체의 빙햄 특성과 유사하게 증가하여 나타났다.

Keywords

References

  1. I. H. Jung, T. Kim, "Study on Value Establishment and Local Welfare Policy Under the South Korea's Low-Fertility and Aging Population Structure", J. of the Korean Urban Management Association, Vol. 23, No. 3, pp.3-27, 2010.
  2. Korean Statistical Information Service, "estimated future population", http://kosis.kr, 2005.1.
  3. K. Kim, C. H. Yu, K. J. Hong, T. K. Kwon, C. U. Hong, N. G. Kim. "Study on the Gait Analysis of the Aged with Lower Limbs Orthotics", Engineering Research, Vol. 36, pp.67-76, 2005.
  4. Carlson, J. D., Catanzarite, D. M. and St. Clair, K. A., "Commercial Magneto -rheological Fluid Devices", Proceedings of 5th International Conference on ER Fluids, MR suspension and Associated Technology, pp.20-28, 1996.
  5. Goncalves, F. D., Jeong-Hoi Koo, Ahmadian, M., "A Review of the State of the Art in Magneto -rheological Fluid Technologies-Part I: MR fluid and MR fluid models.", Shock &Vibration Digest, Vol. 38, No. 3, pp.203-219, 2006. https://doi.org/10.1177/0583102406065099
  6. H. J. Song, D. Woo, S. B. Choi, "Dynamic Characteristic Analysis of MR Impact Damper for Vehicle System", Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 7, pp.754-761, 2006. https://doi.org/10.5050/KSNVN.2006.16.7.754
  7. Dong-Young Lee, J. W. Sohn, Seung-Bok Choi, "A New Type of Active Engine Mount System Featuring MR Fluid and Piezostack", Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 19, No. 6, pp.583- 590, 2009. https://doi.org/10.5050/KSNVN.2009.19.6.583
  8. Eun-Seok Kim, Seung-Bok Choi, "Control Performance Evaluation of MR Fan Clutch for Automotive: Experimental Investigation", Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 20, No. 1, pp.51-57, 2010. https://doi.org/10.5050/KSNVE.2010.20.1.051
  9. patent, "Health Machine Using Magnetorheological Fluid", 100793394, 2008.
  10. Young Wan Jin, "Lower Limbs Muscle Comparative Research for Verification Effect of Rehabilitation Training Program of Total Hip Arthroplasty", Journal of Life Science, Vol. 20, No. 4, pp.543- 548, 2010. https://doi.org/10.5352/JLS.2010.20.4.543
  11. Load Corporation, Load technical data, http://www.lord.com/Products-and-Solutions/Magneto-Rh eological-(MR).
  12. W. C. Park, H. C. Lee, "Study on design of the magnetic pole used in the dashpot type MR fluid mount", Journal of the Korea Academia-Industrial Cooperation Society, Vol. 10, No. 3, pp.482 -487, 2009. https://doi.org/10.5762/KAIS.2009.10.3.482