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首页> 外文期刊>Acta astronautica >The ion beam shepherd: A new concept for asteroid deflection
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The ion beam shepherd: A new concept for asteroid deflection

机译：离子束牧羊人：小行星偏转的新概念

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摘要

A novel slow push asteroid deflection strategy has been recently proposed in which an Earth threatening asteroid can be deflected by exploiting the momentum transmitted by a collimated beam of quasi-neutral plasma impinging against the asteroid surface. The beam can be generated with state-of-the art ion engines from a hovering spacecraft with no need for physical attachment or gravitational interaction with the celestial body. The spacecraft, placed at a distance of a few asteroid diameters, would need an ion thruster pointed at the asteroid surface as well as a second propulsion system to compensate for the ion engine reaction and keep the distance between the asteroid and the shepherd satellite constant throughout the deflection phase. A comparison in terms of required spacecraft mass per total imparted deflection impulse shows that the method outperforms the gravity tractor concept by more than one order of magnitude for asteroids up to about 200 m diameter. The two methods would yield comparable performance for asteroids larger than about 2 km.
机译：最近提出了一种新颖的慢推小行星偏转策略，其中可以利用准直中性等离子体准直光束撞击小行星表面所传递的动量来偏转威胁地球的小行星。可以使用最新的离子引擎从悬停的航天器产生束，而无需与天体进行物理附着或重力相互作用。放置在几个小行星直径距离处的航天器将需要一个指向小行星表面的离子推进器以及第二个推进系统，以补偿离子发动机的反应并在整个过程中保持小行星与牧羊卫星之间的距离恒定偏转阶段。根据所需的航天器质量/总传递偏转脉冲进行的比较表明，对于直径最大约200 m的小行星，该方法比重力拖拉机概念高出一个数量级。对于大于约2 km的小行星，这两种方法将产生可比的性能。

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  • 来源
    《Acta astronautica》 |2013年第1期|98-102|共5页
  • 作者

    Claudio Bombardelli; Hodei Urrutxua; Mario Merino1; Jesus Pelaez; Eduardo Ahedo;

  • 作者单位

    School of Aeronautical Engineering, Technical University of Madrid, Plaza Cardenal Cisneros, 3, 28040 Madrid, Spain;

    School of Aeronautical Engineering, Technical University of Madrid, Plaza Cardenal Cisneros, 3, 28040 Madrid, Spain;

    School of Aeronautical Engineering, Technical University of Madrid, Plaza Cardenal Cisneros, 3, 28040 Madrid, Spain;

    School of Aeronautical Engineering, Technical University of Madrid, Plaza Cardenal Cisneros, 3, 28040 Madrid, Spain;

    School of Aeronautical Engineering, Technical University of Madrid, Plaza Cardenal Cisneros, 3, 28040 Madrid, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Asteroid deflection; Low thrust; Ion beam shepherd; Gravity tractor; b-plane; Tangential thrust;

    机译：小行星挠度;低推力;离子束牧羊人;重力拖拉机;b平面;切向推力;

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