减少载人火星任务转移时间的四种空间推进方法比较
Comparison of Four Space Propulsion Methods for Reducing Transfer Times of Crewed Mars Mission
摘要：
我们评估的可能性，减少旅行时间的载人火星任务，通过检查四种不同的推进方法，并保持在出发时的质量低于2500吨，一个固定的架构。我们评估了三种不同的最先进技术（化学，核热和电）和一种先进技术，“纯电磁推力”（PEMT）概念（由Rubbia提出）的代表性系统。为了估算影响推进系统性能的质量预算，假设了一个主要基于设计参考体系结构5.0的任务体系结构。绘制了飞行时间和飞行时间与飞行质量的帕累托曲线。我们的结论是，离子发动机技术，与经典的化学发动机相结合，产生最短的任务时间，这种架构具有最低的质量和化学推进单独是最好的，以尽量减少旅行时间。使用PEMT获得的结果表明，它可能是比火星更远的目的地更合适的解决方案。
英文摘要：
We assess the possibility of reducing the travel time of a crewed mission to Mars by examining four different propulsion methods and keeping the mass at departure under 2500 tonne, for a fixed architecture. We evaluated representative systems of three different state of the art technologies (chemical, nuclear thermal and electric) and one advance technology, the ``Pure Electro-Magnetic Thrust'' (PEMT) concept (proposed by Rubbia). A mission architecture mostly based on the Design Reference Architecture 5.0 is assumed in order to estimate the mass budget, that influences the performance of the propulsion system. Pareto curves of the duration of the mission and time of flight versus mass of mission are drawn. We conclude that the ion engine technology, combined with the classical chemical engine, yields the shortest mission times for this architecture with the lowest mass and that chemical propulsion alone is the best to minimise travel time. The results obtained using the PEMT suggest that it could be a more suitable solution for farther destinations than Mars.
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