弯道行走地面支反力与利用摩擦系数的研究

通过地面支反力(GRF)求得的利用摩擦系数(UCOF)是预测行走滑跌可能性的一个有效方法。为了研究不同转弯策略下的利用摩擦系数,进而预测其滑跌可能性,本研究选取了10名健康男性青年进行直道行走与两种转弯策略(外侧脚转弯与内侧脚转弯)下的60°、90°转弯行走试验,使用ATMI测力台采集地面支反力数据,进而求出各行走条件下的利用摩擦系数。结果表明,各行走条件下的足。地问内外剪切力差异较大;弯道行走的滑跌可能性显著大于直道行走。对于内侧脚转弯,转弯角度对利用摩擦系数峰值没有显著影响。对于外侧脚转弯,推进力随转弯角度的增大而减小,这使得60°转弯时的利用摩擦系数峰值相较于90°转弯明显增大。这表明,...

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Published inSheng wu yi xue gong cheng xue za zhi Vol. 34; no. 1; pp. 53 - 56
Main Author 成方敏 张峻霞 苏海龙 王新亭
Format Journal Article
LanguageChinese
English
Published 中国四川 四川大学华西医院 25.02.2017
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ISSN1001-5515
DOI10.7507/1001-5515.201603019

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Summary:通过地面支反力(GRF)求得的利用摩擦系数(UCOF)是预测行走滑跌可能性的一个有效方法。为了研究不同转弯策略下的利用摩擦系数,进而预测其滑跌可能性,本研究选取了10名健康男性青年进行直道行走与两种转弯策略(外侧脚转弯与内侧脚转弯)下的60°、90°转弯行走试验,使用ATMI测力台采集地面支反力数据,进而求出各行走条件下的利用摩擦系数。结果表明,各行走条件下的足。地问内外剪切力差异较大;弯道行走的滑跌可能性显著大于直道行走。对于内侧脚转弯,转弯角度对利用摩擦系数峰值没有显著影响。对于外侧脚转弯,推进力随转弯角度的增大而减小,这使得60°转弯时的利用摩擦系数峰值相较于90°转弯明显增大。这表明,弯道角度对内侧脚转弯时的滑跌概率影响较小,而对外侧脚转弯影响较大,角度越大滑跌概率越小。
Bibliography:turning gait; ground reaction forces; utilized coefficient of friction; possibility of slip
51-1258/R
CHENG Fangmin1,2,3, ZHANG Junxia1,2, SU Hailong1,2, WANG Xinting1,2( 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)
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
ISSN:1001-5515
DOI:10.7507/1001-5515.201603019