Research on ground reaction forces and utilized coefficient of friction of turning gait_Journal of Biomedical Engineering

Authors：

CHENG Fangmin ^1,2,3 ,  ZHANG Junxia ^1,2 , SU Hailong ^1,2 , WANG Xinting ^1,2

1. School of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, P.R.China;
2. Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, Tianjin University of Science and Technology, Tianjin 300222, P.R.China;
3. Institute of Industrial Design, Northwestern Polytechnical University, Xi’an 710072, P.R.China;

Corresponding author：

ZHANG Junxia, Email: zjx@tust.edu.cn

Keywords：

turning gait; ground reaction forces; utilized coefficient of friction; possibility of slip

DOI：

10.7507/1001-5515.201603019

Video：

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Utilized coefficient of friction (UCOF), which is calculated with ground reaction forces (GRF), is an effective factor to predict the possibility of slip. For researching the UCOF values of different turning strategies and then predicting the possibility of slip, this study selected 10 healthy young men to perform straight walking and 60° and 90° turning using two turning strategies (step turning and spin turning). ATMI force plate was used to collect the data of GRF, and then the UCOF values of different walking conditions were calculated. The study showed that difference of the medial-lateral force in different walking conditions was great; the slip possibility of turning was significantly greater than that of straight walking. For spin turn, turning angle had no significant effect on peak UCOF values. For step turn, the propulsive force decreased with the increase of turning angle, which caused a result that the peak UCOF values of 60° turn were significantly greater than that for 90° turn. This suggests that turning angle had little effect on possibility of slip of spin turning but great effect on that of step turning, and the greater angle led smaller possibility of slip.

Citation： CHENGFangmin, ZHANGJunxia, SUHailong, WANGXinting. Research on ground reaction forces and utilized coefficient of friction of turning gait. Journal of Biomedical Engineering, 2017, 34(1): 53-56. doi: 10.7507/1001-5515.201603019 Copy

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9.	Taylor M J, Dabnichki P, Strike S C. A three-dimensional biomechanical comparison between turning strategies during the stance phase of walking. Hum Mov Sci, 2005, 24(4): 558-573.
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12.	Kim S, Lockhart T, Yoon H Y. Relationship between age-related gait adaptations and required coefficient of friction. Saf Sci, 2005, 43(7): 425-436.

1. 刘翠鲜, 沈志祥. 老年跌倒的特点与预防策略. 中国老年学杂志, 2013, 33(2): 459-461.
2. Yeoh H T, Lockhart T E, WU Xuefang. Non-fatal occupational falls on the same level. Ergonomics, 2013, 56(2): 153-165.
3. Cumming R G, Klineberg R J. Fall frequency and characteristics and the risk of hip fractures. J Am Geriatr Soc, 1994, 42(7): 774-778.
4. Singh T, Koh M. Effects of backpack load position on spatiotemporal parameters and trunk forward lean. Gait Posture, 2009, 29(1): 49-53.
5. Glaister B C, Orendurff M S, Schoen J A, et al. Ground reaction forces and impulses during a transient turning maneuver. J Biomech, 2008, 41(14): 3090-3093.
6. Redfern M, Andres R. The analysis of dynamic pushing and pulling; required coefficients of friction//Proceedings of the 1984 International Conference on Occupational Ergonomics, Toronto: Human Factors Association of Canada, 1984: 161-165.
7. 张峻霞, 曹琳, 苏海龙, 等. 基于足-地接触力的滑跌概率预测模型研究. 高技术通讯, 2012, 22(9): 951-956.
8. Nagano H, Sparrow W A, Begg R K. Biomechanical characteristics of slipping during unconstrained walking, turning, gait initiation and termination. Ergonomics, 2013, 56(6): 1038-1048.
9. Taylor M J, Dabnichki P, Strike S C. A three-dimensional biomechanical comparison between turning strategies during the stance phase of walking. Hum Mov Sci, 2005, 24(4): 558-573.
10. Redfern M S, Cham R, Gielo-Perczak K, et al. Biomechanics of slips. Ergonomics, 2001, 44(13): 1138-1166.
11. Burnfield J M, Powers C M. The role of center of mass kinematics in predicting peak utilized coefficient of friction during walking. J Forensic Sci, 2007, 52(6): 1328-1333.
12. Kim S, Lockhart T, Yoon H Y. Relationship between age-related gait adaptations and required coefficient of friction. Saf Sci, 2005, 43(7): 425-436.

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