在非周期性活动期间的质量估计中心:基于标记的方法的比较和它们与地面反应力的融合
Mohsen Alizadeh Noghani1, Jingshu Peng2, Edgar Bolívar-Nieto1
1Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, 46556, IN, United States of America.
Journal of biomechanics
|May 6, 2025
概括
选择最好的方法来估计全身质量中心 (CoM) 取决于活动. 全身标记 (WM) 方法推用于动态活动,提供准确的 CoM 位置和速度估计,而不需要地面反应力 (GRF).
科学领域:
- 生物力学 生物力学
- 人类运动分析 人类运动分析
- 姿势控制研究研究 姿势控制研究
背景情况:
- 准确的全身质量中心 (CoM) 估计对于评估人类的稳定性和姿势控制至关重要.
- 选择合适的COM估计方法是具有挑战性的,因为不同的活动类型,设备可用性 (例如,地面反应力 - GRF的力板) 和处理时间.
- 现有的方法包括盆腔标记器 (PM),盆腔标记器和GRF (PMG),全身标记器 (WM) 和全身标记器和GRF (WMG).
研究的目的:
- 为了比较四种不同的3D质量中心 (CoM) 估计方法的准确性.
- 在静态和动态的人类活动中评估这些方法.
- 根据性能和实际考虑,确定最合适的COM估计方法.
主要方法:
- 评估了四种3D CoM估计方法:盆腔标记 (PM),盆腔标记和GRFs (PMG),全身标记 (WM) 和全身标记和GRFs (WMG).
- 方法在4个静态活动和10个动态活动中进行了测试.
- 使用外部力残余的根平均平方 (RMS) 来评估性能.
主要成果:
- 在静态活动中,所有方法在CoM位置和速度估计方面都表现相似.
- 在动态活动中,全身方法 (WM,WMG) 与基于骨盆的方法 (PM,PMG) 相比,对于位置估计的残余值显著较低.
- 对于动态任务中的速度估计,WM和WMG的表现优于PM,PMG也比PM表现得更好.
结论:
- 全身标记 (WM) 方法是推用于动态活动,因为其高精度和独立于地面反应力 (GRFs).
- 盆腔标记 (PM) 方法适用于静态活动,其中盆腔运动反映了全身运动.
- 当GRF可用时,卡尔曼过可以提高PM方法的速度估计.
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