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2012年4月,嫦娥二号卫星转入再扩展任务,由日-地拉格朗日L2点出发,实施与4179Toutatis小行星的交会试验任务.本文分析了任务约束及卫星相关特点,首次提出了主动近距离与目标交会的逼近飞越策略和基于相对速度方向凝视的高速飞越成像技术方案,并介绍了策略和方案分析、仿真验证情况.上述飞越和成像技术基于卫星配置、性能和高速飞越任务特性设计,具有实施约束小、执行可靠度高的特点,满足任务预期目标.不同于以往实施任务,该设计在逼近目标星和适应高速成像等方面有独创性,适用于未来的多目标小天体探测任务,在深空探测领域具有应用前景.
In April 2012, the Chang’e 2 satellite moved into a further expansion mission, starting from day-to-earth Lagrange point L2, to carry out the rendezvous test with the 4179Toutatis asteroid.This paper analyzed the mission constraints and the satellite-related features and proposed for the first time Proactive approach and target approach flyby strategy and high-speed overflight imaging technology based on relative speed gaze, and introduced the strategy and scheme analysis and simulation verification.The above-mentioned overflight and imaging technology are based on satellite configuration, performance and high-speed flight mission characteristics Which has the characteristics of small implementation constraint and high implementation reliability to meet the mission expectation target.Different from the previous implementation tasks, this design is original in approaching the target star and adapting to high-speed imaging and is suitable for the future multi-target small celestial exploration Mission, has the application prospect in the deep space exploration field.