为可靠捕获太空碎片同时优化系网系统和行动的设计

IF 1.3 4区 工程技术 Q2 ENGINEERING, AEROSPACE
C. Zeng, Grant R. Hecht, Souma Chowdhury, E. M. Botta
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引用次数: 0

摘要

从追逐者航天器上布设的系绳网是捕获空间碎片的一种很有前途的解决方案。单次捕获过程的成功取决于网的结构动态特性(归因于其物理设计),以及在传感和驱动不确定的情况下执行最佳发射和闭合的能力。因此,本文提出了一个基于可靠性的优化框架,以同时优化网的设计及其发射和关闭操作,从而最大限度地减少系统质量(情况 1)或关闭时间(情况 2),同时保持指定的捕获成功概率。成功率以捕获质量指标和锁定节点对的数量来评估。高斯噪声用于模拟系绳网的动态、状态估计和驱动中的不确定性,并通过蒙特卡罗采样传播。考虑到模拟系绳网动态的成本,为了考虑不确定性并确保计算效率,采用了贝叶斯优化来解决这一问题。优化结果表明,在存在不确定性的情况下,任务成功率从 75% 提高到了 98% 以上,而捕获完成时间几乎缩短了一半。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Concurrent Design Optimization of Tether-Net System and Actions for Reliable Space-Debris Capture
Tether-nets deployed from a chaser spacecraft are a promising solution to capturing space debris. The success of the one-shot capture process depends on the net’s structural dynamic properties, attributed to its physical design, and on the ability to perform an optimal launch and closure subject to sensing and actuation uncertainties. Hence, this paper presents a reliability-based optimization framework to simultaneously optimize the net design and its launch and closing actions to minimize the system mass (case 1) or closing time (case 2) while preserving a specified probability of capture success. Success is assessed in terms of a capture quality index and the number of locked node pairs. Gaussian noise is used to model the uncertainties in the dynamics, state estimation, and actuation of the tether-net, which is propagated via Monte Carlo sampling. To account for uncertainties and ensure computational efficiency, given the cost of simulating the tether-net dynamics, Bayesian optimization is used to solve this problem. Optimization results show that the mission success rate in the presence of uncertainties has increased from 75% to over 98%, while the capture completion time has almost halved.
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来源期刊
Journal of Spacecraft and Rockets
Journal of Spacecraft and Rockets 工程技术-工程:宇航
CiteScore
3.60
自引率
18.80%
发文量
185
审稿时长
4.5 months
期刊介绍: This Journal, that started it all back in 1963, is devoted to the advancement of the science and technology of astronautics and aeronautics through the dissemination of original archival research papers disclosing new theoretical developments and/or experimental result. The topics include aeroacoustics, aerodynamics, combustion, fundamentals of propulsion, fluid mechanics and reacting flows, fundamental aspects of the aerospace environment, hydrodynamics, lasers and associated phenomena, plasmas, research instrumentation and facilities, structural mechanics and materials, optimization, and thermomechanics and thermochemistry. Papers also are sought which review in an intensive manner the results of recent research developments on any of the topics listed above.
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