| 引用本文: | 林益明,初海彬,秦子增.基于星间链路GNSS自主完好性加权算法.[J].国防科技大学学报,2010,32(5):49-54.[点击复制] |
| LIN Yiming,CHU Haibin,QIN Zizeng.GNSS Autonomous Navigation Integrity Weighted Technique Base On Crosslink[J].Journal of National University of Defense Technology,2010,32(5):49-54[点击复制] |
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| 基于星间链路GNSS自主完好性加权算法 |
| 林益明1, 初海彬2, 秦子增1 |
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(1.国防科技大学 航天与材料工程学院，湖南 长沙 410073;2.中国空间技术研究院，北京 100094)
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| 摘要: |
| 全球卫星导航系统在自主导航工作模式下，传统的地面支持完好性系统无法满足用户的完好性要求。因此提出一种基于星间链路的全球卫星导航系统(GNSS)自主完好性加权算法，通过改进稳健估计理论中的M-估计对星间链路测距加权的计算方法，降低故障卫星星间测距值的影响，以保持星座自主时间同步和精密定轨处理的连续、稳定与精度。仿真结果表明，在一颗及两颗故障卫星情况下，基于星间链路的GNSS自主完好性加权算法，可以有效地消除故障卫星对自主导航精密定轨的影响，星座具有与无故障时相当的自主定轨精度。 |
| 关键词: GNSS 星间链路 自主导航 完好性 |
| DOI： |
| 投稿日期：2010-04-09 |
| 基金项目: |
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| GNSS Autonomous Navigation Integrity Weighted Technique Base On Crosslink |
| LIN Yiming1, CHU Haibin2, QIN Zizeng1 |
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(1.College of Aerospace and Materials Engineering, National Univ. of Defense Technology， Changsha 410073, China;2.China Academy of Space Technology, Beijing 100094, China)
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| Abstract: |
| Under GNSS autonomous navigation mode, traditional system cannot support integrity services. Therefore, a GNSS autonomous navigation integrity weighted technique based on crosslink has been developed, using the modified weight matrix of robust M-estimator for crosslink range degrading by failure satellite. Results show that it can ensure autonomous navigation services precision with continuous stable autonomous orbit determination and time synchronization. Simulation of this technique suggests that it can effectively remove effects of autonomous orbit determination by failure satellite, which has the same orbit determination precision of healthy constellation. |
| Keywords: GNSS(Global Navigation Satellite System) crosslink autonomous navigation integrity |
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