Validation of Models for Net Deployment and Capture Simulation with Experimental Data
Validation of Models for Net Deployment and Capture Simulation with Experimental Data
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DOI：
10.2514/1.a35798
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发表时间：
2023-08
影响因子：
1.6
通讯作者：
Achira Boonrath;E. M. Botta
中科院分区：
文献类型：
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作者：
Achira Boonrath;E. M. Botta
这项工作根据抛物线飞行实验的数据验证了网的集总参数模型和基于电缆的模型。基于Vortex Studio（一个多体动力学仿真框架）的模拟器的功能通过引入i)具有集中质量的网的集中参数模型和ii)基于柔性电缆的模型得到扩展，这两种模型都可以对薄体进行碰撞检测。仿真再现了一个实验场景，并分析了部署和捕获阶段。在这两个阶段都观察到与实验的良好一致，尽管主要由于对实验初始条件的不完全了解而存在差异。结果表明，带内节点的集总参数模型和基于索的模型都能检测出网与目标的细几何之间的碰撞。虽然与没有内部节点的集总参数模型相比，这两种模型都显著提高了捕获的真实感，但基于电缆的模型被发现是最具计算效率的。在部署和初始目标包装期间，建模线程对线程碰撞（即网络各部分之间的碰撞）的影响被分析并确定为可以忽略不计。本工作的结果验证了模型，并增加了该模拟器作为基于网络的碎片捕获研究工具的实用性的信心。在文献中首次验证了基于电缆的模型。
This work validates lumped-parameter models and cable-based models for nets against data from a parabolic flight experiment. The capabilities of a simulator based in Vortex Studio, a multibody dynamics simulation framework, are expanded by introducing i) a lumped-parameter model of the net with lumped masses placed along the threads and ii) a flexible-cable-based model, both of which enable collision detection with thin bodies. An experimental scenario is recreated in simulation, and the deployment and capture phases are analyzed. Good agreement with experiments is observed in both phases, although with differences primarily due to imperfect knowledge of experimental initial conditions. It is demonstrated that both a lumped-parameter model with inner nodes and a cable-based model can enable the detection of collisions between the net and thin geometries of the target. While both models improve notably capture realism compared to a lumped parameter model with no inner nodes, the cable-based model is found to be most computationally efficient. The effect of modeling thread-to-thread collisions (i.e., collisions among parts of the net) is analyzed and determined to be negligible during deployment and initial target wrapping. The results of this work validate the models and increase the confidence in the practicality of this simulator as a tool for research on net-based capture of debris. A cable-based model is validated for the first time in the literature.