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| 1 | Astronauts Hitch First Ride Aboard Private Rocket to Space Station显示文摘On 30 May 2020,two National Aeronautics and Space Administration(NASA)astronauts,Robert Behnken and Douglas Hurley,made history as the first two people to travel to the International Space Station(ISS)aboard a private spacecraft(Fig.1).Nine weeks later,on 2 August 2020,the SpaceX(Hawthorne,CA,USA)built and operated Crew Dragon returned Behnken and Hurley back to Earth,safely completing the mission. | Chris Palmer | 2020 | Engineering2020，6，11： | 2 |
| 2 | SpaceX Starship Lands on Earth, But Manned Missions to Mars Will Require More显示文摘Between December 2020 and March 2021,SpaceX(Hawthorne,CA,USA)launched four prototypes of its Starship,a behemoth rocket intended to one day shuttle people to Mars.Yet,after reaching an altitude of several miles and executing a controlled belly flop back toward to the ground,each one exploded in spectacular fashion during or shortly after landing[1].On 5 May 2021,the company achieved success with a fifth Starship,dubbed SN15(Fig.1),which nailed the landing without blowing up[2].As SpaceX—a relative newcomer in the rocketry business—marches forward on its mission to land people on Mars with its distinctive fail-fast,fix-fast approach,government-backed space agencies foresee using half-century-old nuclear propulsion and ion drive technology to ferry astronauts to the red planet and beyond. | Chris Palmer | 2021 | Engineering2021，7，10： | 1 |
| 3 | 面向火箭构型论证的运载能力快速分析方法显示文摘针对不同构型与任务条件下的运载能力快速计算问题,提出了基于高斯函数和组合神经网络的速度损失计算方法,并基于此对运载能力进行了快速分析。首先,基于状态量解析解计算分析,采用高斯函数对核心的重力速度损失项进行拟合计算;同时,为提高多构型与多任务样本的采样密度、简化数据建模过程并增强方法适应性,采用径向基网络(RBF)与深度神经网络(DNN)的组合形式进行状态量的提取与回归分析;然后将任务约束转化为需要速度增量,通过数值迭代得到运载能力。仿真结果表明,此运载能力分析方法精度偏差约为0.35%,计算耗时小于2 s,可为运载火箭总体参数快速论证与任务规划研究提供理论支撑。 | 刁尹 王永海 卢宝刚 韦常柱 | 2022 | 宇航学报2022，43，6： | 0 |
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