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首页> 外文期刊>Journal of propulsion and power >Optimal Design and Deorbiting Performance of Thermionic Tethers in Geostationary Transfer Orbits
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Optimal Design and Deorbiting Performance of Thermionic Tethers in Geostationary Transfer Orbits

机译：对地静止转移轨道中热电子束缚带的优化设计和解轨道性能

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摘要

The application of a recent concept, a thermionic bare tether (that is, a long conductor coated with a thermionic material), to a practical engineering problem (deorbit space debris from geostationary transfer orbit) is presented. Lorentz drag on a thermionic bare tether, during each pass through an arc close to the perigee, lowers the apogee progressively and produces the object reentry. The performance of a spacecraft equipped with a thermionic bare tether is studied at two different levels, using models that couple thermal and electrical effects. In first place, a simple formula for the eccentricity decrement produced during each perigee pass as a function of TBT properties is derived and used to select TBT optimal dimensions. For a given tether mass, the formula shows that long tethers with small cross-section areas, but large enough to accomplish mechanical constraints, yield the best performance. Second, full numerical simulations of the deorbit maneuver including Lorentz force, air drag, and J_2 perturbations are carried out A spinning thermionic bare tether with a mass of about 16 kg, as well as a length, width, and thickness equal to 6 km, 2 cm, and 50 μm, respectively, passively deorbits a half-ton spacecraft (with a natural deorbit time of about 50 years) in less than six months, without using propellant, expellant, or power supply. The important roles played by the eclipses and the Garth's oblateness on thermionic bare tether performance are highlighted.
机译：提出了一种最新概念，即热电子裸绳（即，涂有热电子材料的长导体）在实际工程问题（来自地球静止转移轨道的脱轨道空间碎片）中的应用。洛伦兹（Lorentz）在每次穿过近地点的弧线时拖曳热电子裸绳，逐渐降低远地点并产生物体折返。使用耦合热效应和电效应的模型，在两个不同的层面上研究了配备有热电子裸链的航天器的性能。首先，推导了一个简单的公式，该公式将每个近程焊道中产生的偏心率降低作为TBT特性的函数，并用于选择TBT最佳尺寸。对于给定的系链质量，该公式显示具有较小横截面积但足够大以完成机械约束的长系链可产生最佳性能。其次，进行了包括Lorentz力，空气阻力和J_2扰动在内的脱轨机动的完整数值模拟。旋转的热电子裸绳，质量约为16 kg，长度，宽度和厚度等于6 km，在不到六个月的时间内，分别使用2厘米和50μm的轨道对半吨重的航天器（自然脱轨时间大约为50年）进行被动脱轨，而无需使用推进剂，推进剂或电源。日食和Garth的扁率对热电子裸绳性能的重要作用得到了强调。

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  • 来源
    《Journal of propulsion and power》 |2017年第2期|425-432|共8页
  • 作者

    G.Sanchez-Arriaga; X.Chen; E.C.Lorenzini;

  • 作者单位

    Universidad Carlos III de Madrid, 28911 Leganés, Spain;

    Universidad Carlos III de Madrid, 28911 Leganés, Spain;

    University of Padova, 35131 Padova, Italy;

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