OpenSim plugin to estimate contact forces using static optimization

The plugin implements a custom OpenSim model component to represent a simple point-on-plane contact model. Friction effects are considered according to the static and the dynamic regime of Coulomb’s law. This contact model is evaluated by a special static optimization procedure, that can be run within OpenSim’s Analyze Tool.We developed this approach to analyze physical interactions between human beings and technical artifacts such as manufacturing machines and sports equipment. However, it is also particularly useful to estimate ground reaction forces during gait.Background information on this approach can be found in the following publication:D. Krüger and S. Wartzack, “A contact model to simulate human–artifact interaction based on force optimization: implementation and application to the analysis of a training machine,” Computer Methods in Biomechanics and Biomedical Engineering, pp. 1–10, Oct. 2017.DOI: 10.1080/10255842.2017.1393804If you would like to use our work in your own research please cite that paper! <br/><br/>This project includes the following software/data packages: <br/> <ul> <li> <a href="https://simtk.org/frs?group_id=1357#pack_1977">contactForces </a> : Distribution of the plugin containing the source code, a DLL for OpenSim 3.2 (64bit), example models and a short documentation. </li> <li> <a href="https://simtk.org/frs?group_id=1357#pack_2099">contactForces4.0 </a> : Update of the previous distribution for OpenSim 4.0containing the source code and a DLL for OpenSim 4.0 (64bit), an example model and a short documentation. </li> </ul>

本插件实现了一个定制的 OpenSim 模型组件，用以表征一个简化的点与平面接触模型。摩擦效应根据库仑定律的静态和动态区域进行考虑。该接触模型通过一种特殊的静态优化程序进行评估，此程序可在 OpenSim 的分析工具中运行。我们开发此方法旨在分析人类与诸如制造机械和体育器材等技术实物之间的物理交互。然而，在估计行走过程中的地面反作用力方面，该方法亦极具实用价值。关于此方法的背景信息可参考以下出版物：D. Krüger 和 S. Wartzack，“基于力优化的接触模型以模拟人机交互：实现与应用至训练机分析，”《计算机生物力学与生物医学工程方法》，第 1-10 页，2017 年 10 月。DOI：10.1080/10255842.2017.1393804。如需在您的研究中使用我们的工作，请引用该论文！

本项目包含以下软件/数据包：

<ul>
<li><a href="https://simtk.org/frs?group_id=1357#pack_1977">contactForces</a>：包含源代码的插件分布，OpenSim 3.2（64位）的 DLL 文件，示例模型及简短文档。</li>
<li><a href="https://simtk.org/frs?group_id=1357#pack_2099">contactForces4.0</a>：针对 OpenSim 4.0 的前一次分布更新，包含源代码和 OpenSim 4.0（64位）的 DLL 文件，示例模型及简短文档。</li>
</ul>