| GEO/IGSO混合区域导航星座的设计与优化算法 |
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| 引用本文： | 徐哲宇,杜兰,刘志豪. GEO/IGSO混合区域导航星座的设计与优化算法[J]. 中国空间科学技术, 2021, 41(2): 19-30. DOI: 10.16708/j.cnki.1000-758X.2021.0018 |
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| 作者姓名： | 徐哲宇 杜兰 刘志豪 |
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| 作者单位： | 信息工程大学地理空间信息学院，郑州450001 |
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| 摘 要： | 区域导航星座能够以较低成本和较短时间获得目标区域导航能力,且地球同步轨道是构建非极区区域导航星座的重要轨道类型.提出一种基于GEO(地球静止轨道)和IGSO(倾斜地球同步轨道)的区域导航星座设计方法.基于星下点轨迹特性构造对称星座设计参数和优化参数集,并考虑地球扁率长期摄动影响,计算星座轨道参数.以导航服务区的统计GD...
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| 关 键 词： | 区域导航星座 GEO/IGSO卫星 差分进化算法 星座设计优化 |
Design and optimization algorithm of GEO/IGSO hybrid regional navigation constellation |
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| XU Zheyu,DU Lan,LIU Zhihao. Design and optimization algorithm of GEO/IGSO hybrid regional navigation constellation[J]. Chinese Space Science and Technology, 2021, 41(2): 19-30. DOI: 10.16708/j.cnki.1000-758X.2021.0018 |
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| Authors: | XU Zheyu DU Lan LIU Zhihao |
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| Affiliation: | Institute of Surveying and Mapping,Information Engineering University, Zhengzhou 450001, China |
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| Abstract: | The regional navigation constellation can provide the navigation ability for the users of the targeted area with the balanced cost and efficiency, and the geosynchronous orbits are some of the important orbit types to construct non-polar regional navigation constellation. A configuration method was proposed for regional navigation constellation based on GEOs (geosynchronous orbits) and IGSOs (inclined geosynchronous orbits). Firstly, a set of SSP (sub-satellite point) involved design parameters were presented and depicted especially for the symmetric constellation. And the long-term perturbations due to the earth's oblateness were induced to recalculate the mean orbital elements of the GEOs and IGSOs and propagate their orbits. Then the statistical GDOP (geometric dilution precision) of the grid points of the specific navigation service area was used as the objective function for the DE (differential evolution) optimization algorithm. Finally, taking the Indian constellation of IRNSS as an example, the presented design and optimization algorithm was verified by the constellation simulation, and various configurations and orbit types of IRNSS constellation were discussed in detail. The results show that for India and surrounding region, the 7-satellite constellation can best consider the navigation performance and construction cost; the elliptical orbit is unable to take into account the navigation performance of the northern and southern hemispheres, which is difficult to expand to global navigation constellation. This method can improve the global optimization efficiency of GEO / IGSO hybrid regional navigation constellation, and provide the number of satellitesand configuration design quickly for the subsequent asymmetric constellation. |
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| Keywords: | regional navigation constellation GEO/ IGSO satellite differential evolution algorithm constellation design optimization |
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