利用碳纳米管系绳保持低空轨道的 EDT 演示

IF 3.1 2区 物理与天体物理 Q1 ENGINEERING, AEROSPACE Acta Astronautica Pub Date : 2024-10-01 DOI:10.1016/j.actaastro.2024.09.066
Masahiro Nohmi , Koki Matsuo , Satomi Kawamoto , Yasushi Ohkawa
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引用次数: 0

摘要

本文介绍了电动系绳系统(EDT)。导电系绳用于克服低轨道的大气阻力,并利用 EDT 推进器延长轨道寿命。首先,根据概念设计,通过模拟评估了 EDT 系统的可行性。特别是明确了导电系绳的感应电动势、保持轨道高度所需的电流大小以及对每个装置的要求。然后,对关键任务装置的可行性进行了实验评估。这些装置包括导电系绳、电子发射装置和系绳延伸控制机制。导电系绳计划由碳纳米管制成,碳纳米管作为一种新材料备受关注,我们对其特性进行了评估。电子发射装置已被评估为可安装在微型/纳米卫星上的装置。系绳延伸机制是在我们过去的项目中开发的,因此应该对其进行评估,以适应导电系绳系统。在评估的基础上,提出了使用微型/纳米卫星的轨道演示任务计划。任务如下。导电系绳在重力梯度的作用下延伸并稳定。通过安装在高空卫星上的电子发射器发射电子,并在低空一端的裸系带上收集电子,从而产生从高空一侧到低空一侧的电流。根据弗莱明定律,洛伦兹力产生于轨道加速的方向,因此可以推动卫星沿轨道向上运行。
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EDT demonstration for keeping low altitude orbit using carbon nanotube tether
This paper describes an electrodynamic tether system (EDT). Conductive tethers are used to overcome atmospheric resistance in low orbit and extend orbit life using EDT propulsion. First, based on the conceptual design, the feasibility of the EDT system has been evaluated through simulation. Especially, the induced electromotive force of the conductive tether has been clarified, the amount of current required to keep the orbital altitude, and the requirements for each device. Then, feasibilities of the key mission devices have been evaluated experimentally. Those are the conductive tether, the electron emission device, and the tether extension control mechanism. The conductive tether is planned to be made of carbon nanotubes, which are attracting attention as a new material, and its properties are evaluated. The electron-emitting device has been evaluated as a device that can be mounted on a micro/nano satellite. Tether extension mechanism was developed in our past project, then it should be evaluated with the purpose of adapting to conductive tether systems. Based on the evaluation, the orbital demonstration mission plan using a micro/nano satellite has been introduced. The mission is as follows. The conductive tether is extended and stabilized by the gravity gradient. By emitting electrons from an electron emitter mounted on a high-altitude satellite and collecting electrons on bare tether at low-altitude end, a current is generated from the high-altitude side to the low-altitude side. According to Fleming's law, the Lorentz force is generated in the direction of the orbiting accelerated, so it can be propelled in the upward direction of the orbit.
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来源期刊
Acta Astronautica
Acta Astronautica 工程技术-工程:宇航
CiteScore
7.20
自引率
22.90%
发文量
599
审稿时长
53 days
期刊介绍: Acta Astronautica is sponsored by the International Academy of Astronautics. Content is based on original contributions in all fields of basic, engineering, life and social space sciences and of space technology related to: The peaceful scientific exploration of space, Its exploitation for human welfare and progress, Conception, design, development and operation of space-borne and Earth-based systems, In addition to regular issues, the journal publishes selected proceedings of the annual International Astronautical Congress (IAC), transactions of the IAA and special issues on topics of current interest, such as microgravity, space station technology, geostationary orbits, and space economics. Other subject areas include satellite technology, space transportation and communications, space energy, power and propulsion, astrodynamics, extraterrestrial intelligence and Earth observations.
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