Correction of the inertial effect resulting from a plate moving under low-friction conditions.
Correction of the inertial effect resulting from a plate moving under low-friction conditions.
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修正板在低摩擦条件下移动时产生的惯性效应。
DOI：
10.1016/j.jbiomech.2006.12.008
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发表时间：
2007
影响因子：
2.4
通讯作者：
Pai,Yi-Chung
中科院分区：
文献类型：
--
作者：
Yang,Feng;Pai,Yi-Chung
本研究的目的是开发一组方程，可以用来消除惯性效应的可移动平台上，一个人站在一个滑移诱导步态，这使得真实的地面反作用力（GRF）和它的压力中心（COP）被确定。还进行了分析，以确定如何敏感的COP偏移量的变化的方程中的参数，影响惯性效应的校正。此外，实验结果进行了验证，使用低摩擦可移动平台连同一个固定的物体，钟摆，和人类受试者在步态过程中引起的滑动。我们的分析表明，由于可移动组件的惯性效应所需的校正量的影响，其质量和质心（COM）的位置，加速度，摩擦系数，和脚相对于COM的着陆位置。GRF水平分量的最大误差接近0.09（体重），在从步行中滑倒恢复。在不作校正的情况下，COP测量的最大误差可达4cm。最后，这些误差在关节力矩计算中被放大并向近端传播，从踝关节到髋关节的范围为0.2至1.0Nm/体重。
The purpose of the present study was to develop a set of equations that can be employed to remove the inertial effect introduced by the movable platform upon which a person stands during a slip induced in gait; this allows the real ground reaction force (GRF) and its center of pressure (COP) to be determined. Analyses were also performed to determine how sensitive the COP offsets were to the changes of the parameters in the equation that affected the correction of the inertial effect. In addition, the results were verified empirically using a low friction movable platform together with a stationary object, a pendulum, and human subjects during a slip induced during gait. Our analyses revealed that the amount of correction required for the inertial effect due to the movable component is affected by its mass and its center of mass (COM) position, acceleration, the friction coefficient, and the landing position of the foot relative to the COM. The maximum error in the horizontal component of the GRF was close to 0.09 (body weight) during the recovery from a slip in walking. When uncorrected, the maximum error in the COP measurement could reach as much as 4cm. Finally, these errors were magnified in the joint-moment computation and propagated proximally, ranging from 0.2 to 1.0Nm/body mass from the ankle to the hip.