›› 2014, Vol. 34 ›› Issue (1): 36-41.doi: 10.3780/j.issn.1000-758X.2014.01.005

• 研究探讨 • 上一篇    下一篇

基于遗传算法的航天器再入动态终迹圈研究

胡海龙, 南英, 闻新   

  1. (南京航空航天大学航天学院,210016)
  • 收稿日期:2013-03-04 修回日期:2013-07-29 出版日期:2014-02-25 发布日期:2014-02-25
  • 作者简介:胡海龙, 1990年生,2011年毕业于南京航空航天大学航空宇航制造工程专业,现为南京航空航天大学飞行器设计专业硕士研究生。研究方向为航天器轨迹优化与控制。

Research on Dynamic Reentry Footprint for the SpacecraftBased on the Genetic Algorithm

HU Hai-long, NAN Ying, WEN Xin   

  1. (School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016)
  • Received:2013-03-04 Revised:2013-07-29 Online:2014-02-25 Published:2014-02-25

摘要: 为实现航天器安全准确地沿最优飞行轨迹再入,对航天器再入飞行过程中任意时刻飞行状态,在满足所有约束条件下,计算航天器所能达到的地面最大着陆区域,以判断该时刻飞行器能否到达预定着陆点。文章采用改进的遗传算法对航天器再入飞行轨迹进行优化,结合再入动态终迹圈计算方法,实现再入动态终迹圈的仿真计算。通过对仿真结果的对比分析,得到再入动态终迹圈及相应再入飞行轨迹的特性,对航天器再入飞行制导及航迹规划具有一定的借鉴意义。

关键词: 再入动态终迹圈, 轨迹优化, 遗传算法, 航天器

Abstract: A new concept of dynamic reentry footprint was presented to ensure the reentry of the spacecraft safely and accurately. Concerned with all the given flight states and the constraint conditions of the spacecraft during the whole reentry flight process, the maximum reachable area on the earth surface can be calculated by the given numerical algorithm. Combined with the dynamic reentry numerical algorithm, the modified genetic algorithm was applied to optimize the reentry flight trajectories, and all the qualified trajectories which constitute the landing footprint can be calculated. Through a series of reentry flight numerical simulations, the characteristics of dynamic reentry footprint was summarized, which can be used to optimize the guidance and flight trajectory.

Key words: Dynamic reentry footprint, Trajectory optimization, Genetic algorithm, Spacecraft