Oscillation and reaction board techniques for estimating inertial properties of a below-knee prosthesis.
Oscillation and reaction board techniques for estimating inertial properties of a below-knee prosthesis.
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DOI：
10.3791/50977
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发表时间：
2014-05-08
期刊：
影响因子：
--
通讯作者：
Martin PE
中科院分区：
文献类型：
--
作者：
Smith JD;Ferris AE;Heise GD;Hinrichs RN;Martin PE
本研究的目的有两个方面：1)展示一种可用于直接估计膝下假体惯性特性的技术，2)对比所提出的技术和使用完整肢体惯性特性对单侧经胫骨截肢者行走时关节动力学估计的影响。在测量已知几何固体的惯性特性时，验证了振荡和反力板系统的可靠性。当直接测量假肢的惯性特性用于下肢的逆动力学建模时，与基于完整的小腿和足部的惯性估计相比，髋关节和膝关节的关节动力学在行走的摆动阶段显着降低。然而，站立期间关节动力学的差异比摇摆期间观察到的要小。因此，专注于步行摇摆阶段的研究人员应该考虑假体惯性特性估计对研究结果的影响。例如，在我们的研究中调查的两种惯性模型中的任何一种都可能导致与逆动力学评估相似的结果。
The purpose of this study was two-fold: 1) demonstrate a technique that can be used to directly estimate the inertial properties of a below-knee prosthesis, and 2) contrast the effects of the proposed technique and that of using intact limb inertial properties on joint kinetic estimates during walking in unilateral, transtibial amputees. An oscillation and reaction board system was validated and shown to be reliable when measuring inertial properties of known geometrical solids. When direct measurements of inertial properties of the prosthesis were used in inverse dynamics modeling of the lower extremity compared with inertial estimates based on an intact shank and foot, joint kinetics at the hip and knee were significantly lower during the swing phase of walking. Differences in joint kinetics during stance, however, were smaller than those observed during swing. Therefore, researchers focusing on the swing phase of walking should consider the impact of prosthesis inertia property estimates on study outcomes. For stance, either one of the two inertial models investigated in our study would likely lead to similar outcomes with an inverse dynamics assessment.
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DOI：
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发表时间：
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影响因子：
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作者：
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