Estimating the complete ground reaction forces with pressure insoles in walking
Estimating the complete ground reaction forces with pressure insoles in walking
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DOI：
10.1016/j.jbiomech.2008.05.007
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发表时间：
2008-08-07
影响因子：
2.4
通讯作者：
Chan, Kai-Ming
中科院分区：
文献类型：
--
作者：
Fong, Daniel Tik-Pui;Chan, Yue-Yan;Chan, Kai-Ming
这项研究提出了一种估计步行时压力鞋垫产生的完整地面反作用力的方法。五名男性受试者在实验室进行了 10 次步行试验。在右脚跨步过程中，通过测力板以 1000 Hz 的频率收集完整的地面反作用力。压力鞋垫系统以 100 Hz 的频率同时收集足底压力数据，该系统有 99 个传感器覆盖整个足底区域。进行逐步线性回归，从 99 个单独的压力数据中单独重建三个方向上的完整地面反作用力，直到预测变量之间出现冗余。进行额外的线性回归，通过 99 个压力传感器的值之和来重建垂直地面反作用力。其他五名受试者进行了相同的步行测试以进行验证。使用开发的回归模型计算了三个方向的估计地面反作用力，并与测力台记录的实际数据进行比较。准确度用相关系数和均方根误差来表示。结果显示前后 (0.928) 和垂直 (0.989) 方向的相关性非常好。内外方向相关性合理（0.719）。均方根误差约为峰值记录值的12%、5%和28%。未来的研究应该旨在推广这些方法或为其他受试者、患者、运动建立具体的方法。鞋类和地板状况。该方法提供了一个额外的选择来研究任何环境下完整地面反作用力的估计，而不受测力台数量和位置的限制。 (C) 2008 Elsevier Ltd. 保留所有权利。
This study presented a method to estimate the complete ground reaction forces from pressure insoles in walking. Five male subjects performed 10 walking trials in a laboratory. The complete ground reaction forces were collected during a right foot stride by a force plate at 1000 Hz. Simultaneous plantar pressure data were collected at 100 Hz by a pressure insole system with 99 sensors covering the whole plantar area. Stepwise linear regressions were performed to individually reconstruct the complete ground reaction forces in three directions from the 99 individual pressure data until redundancy among the predictors occurred. An additional linear regression was performed to reconstruct the vertical ground reaction force by the sum of the value of the 99 pressure sensors. Five other subjects performed the same walking test for validation. Estimated ground reaction forces in three directions were calculated with the developed regression models, and were compared with the real data recorded from force plate. Accuracy was represented by the correlation coefficient and the root mean square error. Results showed very good correlation in anterior-posterior (0.928) and vertical (0.989) directions. and reasonable correlation in medial-lateral direction (0.719). The root mean square error was about 12%, 5% and 28% of the peak recorded value. Future studies should aim to generalize the methods or to establish specific methods to other subjects, patients, motions. footwear and floor conditions. The method gives an extra option to study an estimation of the complete ground reaction forces in any environment without the constraints from the number and location of force plates. (C) 2008 Elsevier Ltd. All rights reserved.