Design and Testing of a Prosthetic Foot With Interchangeable Custom Springs for Evaluating Lower Leg Trajectory Error, an Optimization Metric for Prosthetic Feet
Design and Testing of a Prosthetic Foot With Interchangeable Custom Springs for Evaluating Lower Leg Trajectory Error, an Optimization Metric for Prosthetic Feet
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设计和测试具有可互换定制弹簧的假足，用于评估小腿轨迹误差，这是假足的优化指标
DOI：
10.1115/1.4039342
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Winter, Amos G.
中科院分区：
文献类型：
--
作者：
Prost, Victor;Olesnavage, Kathryn M.;Brett Johnson, W.;Major, Matthew J.;Winter, Amos G.
介绍了一种用于评估一种新的设计目标的实验性假肢。这个目标被称为小腿轨迹误差(LLTE)，它通过对给定假脚的单个支撑过程中小腿的轨迹进行建模，并选择设计变量来最小化该轨迹与健全运动学之间的误差，从而实现被动假肢的优化。为了评估LTE，设计了一个轻质的、具有完全特征化的、具有可变踝关节刚度的测试足。测试脚可以在一系列不同的踝关节僵硬程度上复制生理踝关节的运动范围。测试脚包括一个由缩醛树脂加工的旋转踝关节，可互换的U型尼龙弹簧，范围从1.5N · m/deg到24N · m/deg，以及一个弯曲刚度为16N · m2的灵活尼龙前脚。U型弹簧的设计目的是支持沿其长度的恒定力矩，以最大限度地提高应变能量密度；这一特征对于创造高刚度和高活动范围的脚踝至关重要。该设计在机械和活体测试中的表现与预期一致，其模块化使我们能够快速改变脚踝关节的硬度。初步测试的定性反馈表明，该设计已准备好用于大规模临床试验，以进一步评估LTE作为被动假肢的优化目标的使用。
An experimental prosthetic foot intended for evaluating a novel design objective is presented. This objective, called the lower leg trajectory error (LLTE), enables the optimization of passive prosthetic feet by modeling the trajectory of the shank during single support for a given prosthetic foot and selecting design variables that minimize the error between this trajectory and able-bodied kinematics. A light-weight, fully characterized test foot with variable ankle joint stiffness was designed to evaluate the LLTE. The test foot can replicate the range of motion of a physiological ankle over a range of different ankle joint stiffnesses. The test foot consists of a rotational ankle joint machined from acetal resin, interchangeable U-shaped nylon springs that range from 1.5 N · m/deg to 24 N · m/deg, and a flexible nylon forefoot with a bending stiffness of 16 N · m2. The U-shaped springs were designed to support a constant moment along their length to maximize strain energy density; this feature was critical in creating a high-stiffness and high-range of motion ankle. The design performed as predicted during mechanical and in vivo testing, and its modularity allowed us to rapidly vary the ankle joint stiffness. Qualitative feedback from preliminary testing showed that this design is ready for use in large scale clinical trials to further evaluate the use of the LLTE as an optimization objective for passive prosthetic feet.
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影响因子：
3.8
作者：
E. Singer;G. Ishai;E. Kimmel
通讯作者：
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DOI：
--
发表时间：
2016
期刊：
影响因子：
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DOI：
10.1109/icorr.2015.7281211
发表时间：
2015
期刊：
2015 IEEE International Conference on Rehabilitation Robotics (ICORR)
影响因子：
--
作者：
Kathryn M. Olesnavage;A. Winter
通讯作者：
A. Winter
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DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
Kathryn M. Olesnavage;A. Winter
通讯作者：
A. Winter
DOI：
10.1016/0003-9993(93)90013-z
发表时间：
1993-08-01
影响因子：
4.3
作者：
LEHMANN, JF;PRICE, R;QUESTAD, K
通讯作者：
QUESTAD, K