Preuss R, Fung J
School of Physical and Occupational Therapy, McGill University, Montreal, Canada.
J Biomech. 2004 Aug;37(8):1177-80. doi: 10.1016/j.jbiomech.2003.12.007.
Support surface perturbations are a common paradigm for the study of balance and postural control. Forces and moments acquired from force plates mounted on, or within, the moving surface will contain components resulting from the inertia of the force plate itself. These force plate inertial components must be removed in order to accurately estimate forces resulting from contact with the force plate. This is particularly important when these contact forces are to be used in further calculations, such as an inverse dynamics analysis of joint kinetics. An estimate of the FPIC can be derived using the kinematics of the moving surface and the inertial properties of the force plate. This technique allowed for a reduction of up to 85% of the peak and integrated FPIC acquired from AMTI (OR6-7) force plates during translations of 0.1m, and surface rotations of 10 degrees, using a ramp stimulus of 150 ms duration.
支撑面扰动是研究平衡和姿势控制的常见范式。安装在移动表面上或内部的测力板获取的力和力矩将包含由测力板自身惯性产生的分量。为了准确估计与测力板接触产生的力，必须去除这些测力板惯性分量。当这些接触力用于进一步计算，如关节动力学的逆动力学分析时，这一点尤为重要。可以使用移动表面的运动学和测力板的惯性特性来推导测力板惯性分量（FPIC）的估计值。该技术能够在使用持续时间为150毫秒的斜坡刺激进行0.1米平移和10度表面旋转时，将从AMTI（OR6 - 7）测力板获取的峰值和积分FPIC降低多达85%。
