| 月球软着陆制动段飞行轨迹与制导律研究 |
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| 引用本文： | 王鹏基,张熇,曲广吉.月球软着陆制动段飞行轨迹与制导律研究[J].飞行力学,2007,25(3):62-66. |
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| 作者姓名： | 王鹏基 张熇 曲广吉 |
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| 作者单位： | 1. 北京控制工程研究所,空间智能控制技术国家级重点实验室,北京,100080
2. 中国空间技术研究院,总体部,北京,100086 |
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| 摘 要： | 对自环月轨道开始的月球软着陆制动段飞行轨迹和制导律进行了研究。建立了统一的均匀球体三维软着陆模型,采用燃料次优解析制导方法,通过单步优化获得了局部最优的推力角解析式。同时,在推力角中引入前馈项,用于消除初始位置和速度偏差对软着陆的影响。对制动段飞行轨迹的仿真分析验证了制导律设计的有效性。
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| 关 键 词： | 月球软着陆 制动段 均匀球体软着陆模型 次优解析制导 前馈项 |
| 文章编号： | 1002-0853（2007）03-0062-05 |
| 修稿时间： | 2006-09-18 |
Research on the Descending Trajectory and Guidance for Braking Phase of Lunar Soft-Landing |
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| WANG Peng-ji,ZHANG He,QU Guang-ji.Research on the Descending Trajectory and Guidance for Braking Phase of Lunar Soft-Landing[J].Flight Dynamics,2007,25(3):62-66. |
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| Authors: | WANG Peng-ji ZHANG He QU Guang-ji |
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| Institution: | 1. National Laboratory of Space Intelligent Control, Beijing Institute of Control Engineering, Beijing 100080, China ; 2. Institute of System Engineering, China Academy of Space Technology, Beijing 100086, China |
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| Abstract: | The descending trajectory and the guidance method were presented for the braking phase of lunar soft-landing from a circular orbit.Firstly,this paper studied a general three-dimensional regular sphere model.Then,a sub-optimal fuel guidance method was introduced,and the analytical thrust angles were obtained through a one-step optimization.Moreover,this paper also added two feedforward items into thrust control angles so as to eliminate the effect produced by the initial position and velocity errors.Finally,numerical simulations and analysis of descending trajectory demonstrate the validity of the guidance method. |
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| Keywords: | lunar soft-landing braking phase regular sphere soft-landing model analytical sub-optimal guidance feedforward item |
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