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Automated Missed-Thrust Propellant Margin Analysis for Low-Thrust Trajectories

机译:低推力轨迹的自动推力推进剂余量分析

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摘要

Spacecraft employing low-thrust propulsion must be able to recover from an event in which the spacecraft stops thrusting due to an unforeseen problem. Extra propellant is carried to allow the spacecraft to reach its target in the form of propellant margin. An automated method is presented for estimating the propellant margin a spacecraft should carry. The method is applied to three cases: a transfer to Mars, a gravity-assist trajectory to the asteroid Psyche, and a solar sail transfer to the near-Earth asteroid 1991 VG. Examining different power levels for the Mars transfer, it is shown that a 5% margin is sufficient to recover from a 20 days missed thrust for a 10 kW spacecraft, whereas a 15% margin is required for a 20 kW spacecraft. The gravity-assist case exhibits greater sensitivity to missed thrust, but this problem is alleviated by adding a coast arc before the gravity assist in the nominal case. For the solar sail mission, a spacecraft outage of more than 10 days late in the mission may delay arrival by more than 200 days. The effect of missed thrust on a trajectory must be assessed on a mission-by-mission basis, and it cannot be adequately managed with a general guideline.
机译:采用低推力推进的航天器必须能够从由于不可预见的问题导致航天器停止推力的事件中恢复。携带额外的推进剂以使航天器以推进剂余量的形式到达其目标。提出了一种自动方法,用于估算航天器应携带的推进剂余量。该方法适用于三种情况:转移到火星,重力辅助轨迹到小行星Psyche,以及太阳帆转移到近地小行星1991 VG。检查火星传输的不同功率水平,结果表明,对于10 kW的航天器来说,有5%的裕度足以从20天的失推力中恢复过来,而对于20 kW的航天器则需要15%的裕度。重力辅助情况对错过的推力表现出更大的敏感性,但是在正常情况下,通过在重力辅助之前添加滑行弧可以缓解此问题。对于太阳帆任务,航天飞机在任务后期停运超过10天可能会使到达时间延迟200天以上。必须在逐个任务的基础上评估错位的推力对轨迹的影响,并且不能通过一般指导方针对其进行适当的管理。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2015年第4期|1135-1143|共9页
  • 作者单位

    Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA;

    Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA;

  • 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

  • 入库时间 2022-08-18 02:32:10

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