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首页> 外文期刊>Acta astronautica >Multidisciplinary mission and system design tool for a reusable electric propulsion space tug
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Multidisciplinary mission and system design tool for a reusable electric propulsion space tug

机译：可重复使用的电动推进空间拖船的多学科任务和系统设计工具

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According to the Global Exploration Roadmap, a Getaway in the lunar vicinity will enable the human exploration of the Moon, paving the way toward Mars and further in the deep space. A reusable transportation system, the Lunar Space Tug (LST), can be a key support transportation system to achieve a continuous and sustainable connection between the Earth and the orbital lunar outpost. Exploiting an electrical propulsion technology consisting in Hall Thrusters (HTs), this reusable space cargo system can maximize the delivered payload, with a lower propellant consumption with respect to a chemical-based platform. This significant improvement comes with two main throwbacks: a long transfer time between Earth and Moon and a complex multidisciplinary design of the overall LST. The first issue can be overcome with good mission planning in order to reduce the layover times and maximize the use of the LST. However, the peculiarities of the adopted propulsion technology shape the overall mass and power distribution of the space tug, as well as its transfer trajectory. The design complexity introduced by this subsystem can be effectively investigated if the mission analysis, trajectory generation and subsystem sizing are merged together in one software. In fact, the low-thrust transfer trajectories are highly affected by orbital perturbation and eclipse periods. At the same time, the high demand in power of the propulsion system puts constraints on the mass breakdown and power allocations of the LST, therefore on the reachable thrust level. The trajectory and subsystems sizing limitations call for a particular accurate mission analysis in order to succeed. Only combining all those elements, it is possible to define feasible design boundaries without performing countless simulations trying to optimize each element as a stand-alone part.Politecnico di Torino, in collaboration with the European Space Research and Technology Centre (ESTEC), developed a MatLab-based preliminary design tool for electric propulsion space tug missions, called MultidisciplinAry desiGN Electric Tug tOol (MAGNETO). Starting from the mission analysis of the lunar space tug, the tool building blocks and capabilities are presented. Moreover, the build-in trajectory module will be analysed in-depth. The potentiality of the trajectory generation tool in MAGNETO enables a refined design of the initial design envelope of the LST. For this reason, the improved results will be confronted with the previous LST design tool developed by Politecnico di Torino.
机译：根据全球勘探路线图，农历附近的逍遥游，将使人类探索月球，向火星铺平道路，进一步铺平。可重复使用的运输系统，月球空间拖船（LST），可以是一个关键的支持运输系统，实现地球与轨道月球前哨之间的连续和可持续的联系。利用电气推进技术，包括霍尔推进器（HTS），这种可重复使用的空间货物系统可以最大化交付的有效载荷，相对于基于化学平台的推进剂消耗较低。这种重大改进具有两个主要的回归：地球和月亮之间的长期转移时间以及整体LST的复杂多学科设计。可以使用良好的任务规划克服第一个问题，以减少解放时间并最大限度地利用LST。然而，采用推进技术的特性塑造了空间拖动的总质量和功率分布，以及其传递轨迹。如果在一个软件中合并在一起，则可以有效地研究该子系统引入的设计复杂性。实际上，低推力转移轨迹受到轨道扰动和日食期的高度影响。同时，推进系统的功率高的需求对LST的质量分解和功率分配的限制产生了约束，因此在可达推力水平上。轨迹和子系统规模限制呼叫特定的准确任务分析以便成功。只结合所有这些元素，可以在不执行无数模拟的情况下定义可行的设计边界，试图优化每个元素作为独立Part.politecnico diorino，与欧洲空间研究和技术中心（Estec）合作，开发了一个基于MATLAB的电动推进空间拖曳机构的初步设计工具，称为多学科设计电动拖轮（Magneto）。从Munar Space Tug的任务分析开始，提出了工具构建块和功能。此外，将深入分析构建轨迹模块。 MagnetO中轨迹生成工具的潜力能够精制设计LST的初始设计包络。因此，改进的结果将面对Politecnico di Tiino开发的前一个LST设计工具。

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