Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Development of Active Suspension System for Wheelchairs to Improve Riding Comfort of Gait Disorders

보행 장애인의 승차감 개선을 위한 휠체어용 능동형 서스펜션 시스템 개발

  • Heo, Yeong Jun (Gumi Electronics & Information Technology Research Institute, ICT Convergence Research Division Health Care Research Center) ;
  • Jeon, Geum Sang (Gumi Electronics & Information Technology Research Institute, ICT Convergence Research Division Health Care Research Center) ;
  • Lee, Sang Hun (Gumi Electronics & Information Technology Research Institute, ICT Convergence Research Division Health Care Research Center) ;
  • Choi, Seong Dae (Kumoh National Institute of Technology, Department of Mechanical System Engineering) ;
  • Jang, Ik Gyu (Gumi Electronics & Information Technology Research Institute, ICT Convergence Research Division Health Care Research Center)
  • 허영준 (구미전자정보기술원 ICT융합연구본부 디지털헬스케어연구센터) ;
  • 전금상 (구미전자정보기술원 ICT융합연구본부 디지털헬스케어연구센터) ;
  • 이상훈 (구미전자정보기술원 ICT융합연구본부 디지털헬스케어연구센터) ;
  • 최성대 (금오공과대학교 기계시스템공학과) ;
  • 장익규 (구미전자정보기술원 ICT융합연구본부 디지털헬스케어연구센터)
  • Received : 2020.07.15
  • Accepted : 2020.10.23
  • Published : 2020.10.31
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Abstract

As the number of people with gait disorders increases, the demand for using wheelchairs increases and the area of a ctivity for people with disabilities expands, thereby they increasing the demand for riding comfortability in various driving environments. Therefore, this study is to develop an entry-level active suspension system that apply to wheelchairs and to evaluate its usability. The suspension applied in this paper consists of a coil spring, a shock absorber, a control module to control the strength of the shock absorber, and a road surface condition monitoring system. A wheelchair occupant secures the riding comfort by adjusting the coil strength of the shock absorber in 12 steps according to various road conditions. Therefore, the mechanical properties were evaluated through the structural analysis of the suspension system, and the tendency toward the magnitude of the road surface vibration attenuated according to the rigidity of the suspension through the vibration test was attempted. In conclusion, as a result of structural analysis of the suspension system, stress in a range lower than the yield strength of the material was generated, and the vibration test showed the effect of attenuating the vibration generated from the road surface when the stiffness of the suspension was adjusted.

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References

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