论文标题
Lyra项目：使用核热火箭捕获1i/'Oumuamua
Project Lyra: Catching 1I/'Oumuamua Using Nuclear Thermal Rockets
论文作者
论文摘要
在我们的太阳系中观察到的第一个确定的星际对象是在2017年10月发现的，随后被指定为1i/'oumuamua。除了其外极起源外，对该对象的观察和分析表明，只能通过原位探索来解释一些异常特征。为此，已经提出了各种航天器拦截任务。他们的推进方案已经化学化，利用了木星和太阳能动作（任务持续22年），还使用基于地球的激光推动激光帆（1-2年），均在2030年发射日期。对于前者而言，任务持续时间很延长，并且在后来进行了延长的态度，并不是在2030年的核能。对实际任务尚未实现的检查，但由于其在NASA Rover/Nerva计划中的研究和发展，实际上TRL高于激光推进。使用直接从NASA程序派生的引擎或更高级的选项（如建议的粒子床NTP系统）研究了各种实心反应堆核心选项。 NTP的特定冲动至少是化学火箭的两倍，为更高的ΔV预算打开了机会，从而可以利用更简单，更直接，节省时间的轨迹。 For example a spacecraft with an upgraded NERVA/Pewee-class NTP travelling along an Earth-Jupiter-1I trajectory, would reach 1I/'Oumuamua within 14 years of a launch in 2031. The payload mass to 1I/'Oumuamua would be around 2.5metric tonnes, but even larger masses and shorter mission durations can be achieved with some of the more advanced NTP options studied.在所有4种不同的建议的NTP系统和5个不同的轨迹方案中。
The first definite interstellar object observed in our solar system was discovered in October of 2017 and was subsequently designated 1I/'Oumuamua. In addition to its extrasolar origin, observations and analysis of this object indicate some unusual features which can only be explained by in-situ exploration. For this purpose, various spacecraft intercept missions have been proposed. Their propulsion schemes have been chemical, exploiting a Jupiter and Solar Oberth Maneuver (mission duration of 22 years) and also using Earth-based lasers to propel laser sails (1-2 years), both with launch dates in 2030. For the former, mission durations are quite prolonged and for the latter, the necessary laser infrastructure may not be in place by 2030. In this study Nuclear Thermal Propulsion (NTP) is examined which has yet to materialise as far as real missions are concerned, but due to its research and development in the NASA Rover/NERVA programs, actually has a higher TRL than laser propulsion. Various solid reactor core options are studied, using either engines directly derived from the NASA programs, or more advanced options, like a proposed particle bed NTP system. With specific impulses at least twice those of chemical rockets, NTP opens the opportunity for much higher ΔV budgets, allowing simpler and more direct, time-saving trajectories to be exploited. For example a spacecraft with an upgraded NERVA/Pewee-class NTP travelling along an Earth-Jupiter-1I trajectory, would reach 1I/'Oumuamua within 14 years of a launch in 2031. The payload mass to 1I/'Oumuamua would be around 2.5metric tonnes, but even larger masses and shorter mission durations can be achieved with some of the more advanced NTP options studied. In all 4 different proposed NTP systems and 5 different trajectory scenarios are examined.
