| 用于卫星导航多星故障识别的新方法 |
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| 引用本文： | 张强,张晓林,常啸鸣.用于卫星导航多星故障识别的新方法[J].航空学报,2008,29(5):1239-1244. |
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| 作者姓名： | 张强 张晓林 常啸鸣 |
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| 作者单位： | 北京航空航天大学,电子信息工程学院,北京,100191 |
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| 基金项目： | 国防科工委民用航天重大专项 |
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| 摘 要： | 通过分析广义似然比方法，指出该方法不能用于多星故障识别。为能够快速识别多颗故障卫星，提高卫星导航定位系统的可靠性，提出了一种可以用于多颗故障卫星识别的接收机自主完整性监测（RAIM）的新方法——假设验证法。该方法对所有可能的故障卫星组合进行假设验证，对每种假设的故障卫星组合计算出卫星伪距偏差，然后利用此偏差构造一个新的奇偶残差矢量，最后利用特定的故障识别准则进行判断。以识别2颗故障卫星和识别3颗故障卫星为例进行了计算机仿真，结果显示：假设验证法故障正确识别率高于85%，高于现有的可用于多星故障识别的最优奇偶矢量法，可以有效提高卫星导航系统的可靠性。同时，与最优奇偶矢量法相比，假设验证法不需要求取矩阵广义特征向量，计算量将减少90%以上。
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| 关 键 词： | 卫星导航 接收机自主完好性监测 广义似然比方法 故障识别 假设验证法 |
New Method for Satellite Navigation Identifying Simultaneous Multi-faulty Satellites |
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| Zhang Qiang,Zhang Xiaolin,Chang Xiaoming.New Method for Satellite Navigation Identifying Simultaneous Multi-faulty Satellites[J].Acta Aeronautica et Astronautica Sinica,2008,29(5):1239-1244. |
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| Authors: | Zhang Qiang Zhang Xiaolin Chang Xiaoming |
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| Institution: | Zhang Qiang,Zhang Xiaolin,Chang Xiaoming(School of Electronics , Information Engineering,Beijing University ofAeronautics , Astronautics,Beijing 100191,China) |
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| Abstract: | The generalized likelihood test method is studied, and the result shows that it is unable to identify the simultaneous multi-faulty satellites. In order to identify multi-faulty satellites rapidly, and to improve the reliability of satellites navigation system, a new receiver autonomous integrity monitoring(RAIM) algorithm is proposed, which is called assuming and validating method. This method validates every possible faulty satellites combination, computes satellite pseudo-range deviation for each combina... |
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| Keywords: | satellite navigation RAIM generalized likelihood test fault identification assuming and validating method |
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