推缓冲系数范围的估计,以实现被动假肢膝关节的目标峰值膝关节曲
Nina T Petelina1, V N Murthy Arelekatti2, Amanda L Shorter2
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA. petelina@mit.edu.
Annals of biomedical engineering
|February 16, 2026
概括
一个新的框架可以通过预测最佳阻尼来帮助设计假膝盖. 这确保了受控的膝盖曲,改善了腿骨截肢患者的行走,并帮助调整设备,特别是在资源有限的环境中.
科学领域:
- 生物力学 生物力学
- 假肢和整形手术
- 步态分析 步态分析
背景情况:
- 缺少预测性生物机械模型来缓解假肢膝盖的阻尼作用.
- 关于缓冲对摇摆期间膝盖曲的影响的实证数据很少.
- 优化缓冲对于腿骨截肢者的步态和器件功能至关重要.
研究的目的:
- 开发和验证一个框架来估计假肢膝盖的最佳缓冲系数.
- 量化探索缓冲大小在摇摆阶段对膝盖曲的峰值的影响.
- 提供一种方法,以实现在转肢截肢者身上健身的顶峰膝盖曲.
主要方法:
- 开发了一个三步框架来估计推的缓冲系数范围.
- 该框架使用了健身人的步态数据,并根据腿骨假肢的步态特征进行了调整.
- 估计的缓冲范围在实验上得到验证,使用动力学数据对五名腿部截肢者进行了验证.
主要成果:
- 该框架成功估计了有效的起始减压值.
- 在三名参与者中,在推范围内的缓冲系数接近正常人膝盖曲的峰值 (56 ± 3°).
- 减缓的增加减少了膝盖曲的峰值,而没有减缓导致过度曲.
结论:
- 拟议的框架使假肢膝盖设计师能够实现近乎最佳的缓冲.
- 这可以提高对假肢设备的临床调整效率.
- 该框架对那些寻求控制膝盖曲结果的低收入和中等收入国家特别有利.
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