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Title:: Research on ground reaction forces and utilized coefficient of friction in the process of recovery balance after accident slip

Author(s):: SONG Liming; SHI Shuqian; LU Wentao; School of Robotics, Luoyang Institute of Science and Technology , Luoyang 471000,China

Keywords:: Slip; Ground reaction forces; Utilized coefficient of friction; Shear force; Recovery balance

摘要:: 为了研究正常行走和意外滑移两种不同情况下地面支反力(ground reaction forces, GRF)和利用摩擦系数(utilized coefficient of friction, UCOF)，进而探究影响意外滑移后自主恢复平衡的因子，本研究选取20名健康男性青年在干燥无油直道和涂油直道条件下进行行走试验，使用AMTI测力台分别采集两种情况下的地面支反力数据，进而求出两者利用摩擦系数。结果表明，增大垂直向上支反力、内侧剪切力和向后剪切力有助于滑后恢复。意外滑移过程中UCOF的大小可以表征发生滑移的可能性。本研究结果可为下肢肌群的选取提供参考，同时有助于提出有效的防滑策略。

Abstract:: Study on ground reaction forces(GRF) and utilized coefficient of friction(UCOF) is an important role in process of researching body recovery balance after sliding. For researching the GRF and UCOF value in different situations including normal walking and accident slip and then explore the influence factors of recovery balance after sliding, We selected 20 healthy young men to walk on dry or oil straight road as normal speed. AMTI 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 increasing vertical upward GRF、mediolateral GRF and forward GRF was helpful for recovery balance after sliding. The possibility of accidental slip could be characterized by the friction coefficient (UCOF) in the process of accidental slip. The results will provide the reference for selecting muscles of lower limb and also present the effective anti-slip strategy.