A Method for Quantifying Stiffness of Ankle-Foot Orthoses

Adjustments of Ankle-Foot Orthosis (AFO) stiffness is commonly prescribed for people with neurologically impaired to improve walking. It is important to quantify AFO stiffness levels to provide consistent patient-specific settings. We propose the Ankle Assistive Device Stiffness (AADS) test method, a simple design jig using motion capture system and musculoskeletal analysis software (OpenSim). The collected marker trajectory data were imported to OpenSim to calculate AFO dorsiflexion angle using inverse kinematics. Then a static optimization algorithm was used to identify external forces from operators and the AFO torque best matching the experimentally collected ground reaction force data. Estimated AFO moments were compared within the operators’ trials and with theoretically calculated AFO moments to evaluate the accuracy of AADS tests. This Project will include the model of AFO and ADDS and the scaling, IK and SOP setup sample. <br/><br/>This project includes the following software/data packages: <br/> <ul> <li> <a href="https://simtk.org/frs?group_id=2373#pack_2339">AADS V1 </a> : This file include the osim. file Scale, IK, and SOP setup files compatible with Opensim>4.0. Also a sample data and results of the SOP are included. </li> </ul>

踝足矫形器（AFO）刚度的调整常被用于神经功能障碍患者，旨在改善其行走能力。量化AFO的刚度水平对于提供一致的个性化患者设置至关重要。本研究提出了一种踝部辅助装置刚度测试方法（AADS），该方法采用了一种简易的动捕系统设计夹具及骨骼肌肉分析软件（OpenSim）。所收集的标记轨迹数据被导入OpenSim中，通过逆运动学计算出AFO的背屈角度。随后，运用静态优化算法识别操作者的外部力量以及与实验收集的地面反作用力数据最佳匹配的AFO扭矩。估计的AFO力矩在操作者的试验中以及与理论计算的AFO力矩进行比较，以评估AADS测试的准确性。本项目将包括AFO及AADS模型、比例、逆运动学及SOP设置样本。

本项目包含以下软件/数据包：

<ul>
<li><a href="https://simtk.org/frs?group_id=2373#pack_2339">AADS V1</a>：此文件包含与OpenSim 4.0兼容的osim文件比例、逆运动学及SOP设置文件，同时还包括SOP的样本数据和结果。</li>
</ul>