| 一种卫星导航时间同步完好性监测算法研究 |
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| 引用本文： | 周必磊,任艳阳.一种卫星导航时间同步完好性监测算法研究[J].上海航天,2012,29(2):61-64,72. |
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| 作者姓名： | 周必磊 任艳阳 |
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| 作者单位： | 1. 上海卫星工程研究所,上海,200240
2. 中南大学物理科学与技术学院,湖南长沙,410012 |
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| 摘 要： | 为更好地对卫星导航系统时间同步进行监测,基于Shewhart算法和CUSUM算法的特点,提出了一种Shewhart-CUSUM组合算法。改变状态转移概率,获得小于CUSUM算法的平均运行长度（ARL）。三种算法的关键性能指标ARL比较和实测数据的验证结果表明：在选择合适的参数后,组合算法能有效检测时间同步数据异常。
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| 关 键 词： | 卫星导航 时间同步 Shewhart控制图 CUSUM控制图 平均运行长度 Markov链 |
Study on a Novel Approach for Time Transfer Data Integrity Monitoring |
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| ZHOU Bi-lei,REN Yan-yang.Study on a Novel Approach for Time Transfer Data Integrity Monitoring[J].Aerospace Shanghai,2012,29(2):61-64,72. |
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| Authors: | ZHOU Bi-lei REN Yan-yang |
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| Institution: | 1.Shanghai Institute of Satellite Engineering,Shanghai 200240,China;2.School of Physics Science and Technology,Central South University,Changsha 410012,Hunan,China) |
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| Abstract: | To monitor the time synchronization data for the satellite navigation better,a novel Shewhart-CUSUM combined algorithm was put forward based on the characteristics of Shewhart control chart and CUSUM control chart in this paper.The average run length(ARL) gained by the combined algorithm through changing the state transition probabilities was shorter than that of CUSUM algorithm.The ARL comparison of the three algorithms and the veritification results of the real data showed that the both burst and continuous shifts could be detected by the combined algorithm effectively after the parameters selected properly. |
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| Keywords: | Satellite navigation Time synchronization Shewhart control chart CUSUM control chart Average run length Markov chain |
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