重构全身角动量:探索低通过动态局部参考框架在直线和转动过程中的影响
概括
选择低通过的局部参考框架可以在走路和转时改善全身角动量 (WBAM) 的估计. 过的骨盆和vCoM导向的框架是生物力学分析的实用.
科学领域:
- 生物力学 生物力学
- 人类运动分析 人类运动分析
背景情况:
- 准确的全身角动量 (WBAM) 估计对于理解人类运动至关重要.
- 与解剖学轴对齐的局部参考框架可以改善WBAM计算,特别是在复杂的运动中,例如转动.
- 现有的方法可能会受到骨盆或质量中心速度 (vCoM) 的振荡的影响.
研究的目的:
- 调查不同全球和本地参考框架对WBAM跨解剖轴分布的影响.
- 为了比较WBAM组件分布在直线行走和转动任务中,使用过前和过后的局部.
- 为了确定低通选在标准化WBAM估计在各种参考框架的有效性.
主要方法:
- 在前后 (AP) 和中侧 (ML) 轴上比较WBAM组件分布.
- 使用全球参考框架和由骨盆方向,水平vCoM和平均角速度 (Aω) 定义的局部框架.
- 应用于局部参考框架的低通波器,以减轻横平面振荡.
主要成果:
- 参考框架的选择在所有任务中显著影响了AP和ML WBAM分布.
- 在过之前,面向vCoM的局部框架显示了与骨盆和Aω框架相比明显的AP/ML WBAM.
- 在对局部参考框架应用低通过后,WBAM分布的显著差异消失了.
结论:
- 在直线和转活动中,低通过的局部参考框架对于精确的WBAM估计至关重要.
- 面向骨盆和vCoM的框架比面向Aω的框架更实用,用于未来使用减少传感器集的应用.
- 过的局部框架提高了取决于解剖轴的生物力学参数的适用性.
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