| 引用本文: | 邹毅,张洪波,汤国建.基于能量与动量矩指标的两次“推-滑”离轨制导方法.[J].国防科技大学学报,2014,36(1):46-51.[点击复制] |
| ZOU Yi,ZHANG Hongbo,TANG Guojian.A burn-coast-burn-coast deorbit guidance approach based on energy and angular momentum indices[J].Journal of National University of Defense Technology,2014,36(1):46-51[点击复制] |
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| 基于能量与动量矩指标的两次“推-滑”离轨制导方法 |
| 邹毅, 张洪波, 汤国建 |
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(国防科技大学 航天科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 对航天器在有限推力作用下的“推-滑-推-滑”离轨轨道制导问题进行了研究。将再入接口条件转化为能量与动量矩指标，基于该指标得出了单次“推-滑”的临界地心距，分析了其对离轨策略的影响；推导了有推力作用时飞行器能量与动量矩的相对变化规律，通过使飞行器的能量与动量矩以同样的相对速度减小的方法，导出了制导方程；得到了首次制动时推力方向始终与速度方向相反，二次制动根据制导方程进行导引的轨道形式；对不同高度与不同再入接口条件的离轨问题进行了数值仿真。仿真结果表明，该方法计算量小，可有效解决单次“推-滑”无法实现的离轨制导问题。 |
| 关键词: 离轨制动 再入接口 能量-动量矩 推-滑 轨道规划 离轨制导 |
| DOI：10.11887/j.cn.201401009 |
| 投稿日期：2013-07-04 |
| 基金项目: |
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| A burn-coast-burn-coast deorbit guidance approach based on energy and angular momentum indices |
| ZOU Yi, ZHANG Hongbo, TANG Guojian |
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(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The problem of “burn-coast-burn-coast” deorbit trajectory guidance with finite thrust is studied. The entry interface conditions are transformed into indices of energy and angular momentum, based on which the critical geocentric distance of “burn-coast” deorbit problem is derived and the relationship between entry interface conditions and deorbit strategy is analyzed. Then, the relative changing law of energy and the angular momentum of spacecraft in the burn arc are derived, and the guidance equation is derived by the idea that the energy and angular momentum decrease synchronously in the same relatively rate. According to the entry interface conditions, the trajectory is supposed to be a “burn-coast-burn-coast” style. The first burn needs no guidance, and the direction of the thrust is opposite to the velocity direction. The second burn uses the guidance law. Simulations of different altitude and different entry interface conditions are implemented. The results indicate that the method can effectively solve the deorbit guidance problem that the single “burn-coast” method fails, and the computational effort is not large. |
| Keywords: deorbit braking entry interface energy-angular momentum burn-coast trajectory planning deorbit guidance |
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