RAIM algorithm for identifying simultaneous two-faulty satellites
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摘要: 提出了一种可以识别两颗故障卫星的接收机自主完好性监测算法.将最优奇偶矢量法应用于两颗故障卫星识别,指出由于故障偏差可能会抵消而使得正确识别率较低.对最优奇偶矢量法进行了改进,利用对单颗卫星故障敏感的最优奇偶矢量对所有可能的两颗故障卫星组合分别构造两个新的奇偶矢量,用于两颗故障卫星的检测和识别.计算机仿真结果显示,改进后的算法与直接利用最优奇偶矢量法相比,可以显著提高两颗故障卫星正确识别率,识别率可超过90%.同时,改进算法的奇偶矢量构造方法简单,计算量将减少90%以上,更有利于工程实现.
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关键词:
- 卫星导航 /
- 接收机自主完好性监测 /
- 算法 /
- 最优奇偶矢量 /
- 故障识别
Abstract: A new receiver autonomous integrity monitoring(RAIM) algorithm was proposed for identifying simultaneous two-faulty satellites. The optimal parity vector method was studied, and the results showed that the fault of one satellite may counteract the fault of the other satellite, which reduced correct identifying ratio greatly. Therefore a new approach was developed based the optimal parity vector method. For every possible two-faulty satellites combination, two new parity vectors were constructed for detecting and identifying simultaneous two-faulty satellites, using the parity vectors which were sensitive to designated satellite failure. Computer simulation results show that the correct identifying ratio of using new method is higher than that of using the optimal parity vector method, under the condition of simultaneous two-faulty satellites. With the new algorithm, the correct identifying ratio will be higher than 90%. Moreover, the new method simplifies the processing of constructing parity vector, and reduces more than 90% of the computational burden. So the new method is better for engineering implementation.-
Key words:
- global positioning system /
- RAIM /
- algorithm /
- optimal parity vector /
- fault identification
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[1] Young Dr, Lee C. Performance of receiver autonomous integrity monitoring(RAIM) in the presence of simultaneous multiple satellite faults 60th Annual Meeting of the Institute of Navigation, Dayton, OH, United Statues:Institute of Navigation. 2004:687-697 [2] Ahmed I Abidat, Li Cong, Tan Zhanzhong. The study of RAIM performance by simulation[J]. CADDM, 2006,16(2):58-64 [3] 刘准, 陈哲. GPS自主完整性检测技术研究[J]. 北京航空航天大学学报,2003,29(8):673-676 Liu Zhun, Chen Zhe. Study on GPS receiver autonomous integrity monitoring[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003,29(8):673-676(in Chinese) [4] Jin Hong, Zhang Hongyue. Failure detection using optimal parity vector sensitive to special sensor failure Proceedings of the 1996 IEEE/SICE/RSJ International Conference on Multisensor Fusion and Integration for Intelligent Systems. Washington, DC, USA:IEEE, 1996:55-61 [5] Jin Hong, Zhang Hongyue. Optimal parity vector sensitive to designated sensor fault[J]. Aerospace and Electronic Systems, 1999,35(4):1122-1228 [6] 杨静, 张洪钺. 卫星故障诊断的最优奇偶向量法[J]. 航空学报, 2002,23(2):183-186 Yang Jing, Zhang Hongyue. Satellite fault diagnosis based on optimal parity vector method[J]. Acta Aeronautica et Astronautica Sinica, 2002,23(2):183-186(in Chinese) [7] 陈金平. GPS完善性增强研究 . 郑州:解放军信息工程大学测绘学院,2001 Chen Jinpin. Research of GPS integrity augmentation . Zhengzhou:Institute of Surveying and Mapping, Information Engineering University,2001(in Chinese) [8] 张洪钺. 不确定系统鲁棒解析余度的最优设计[J]. 控制与决策,1994,9(2):141-145 Zhang Hongyue. Optimal design of robust analytical redundancy for uncertain systems[J]. Control and Decision, 1994,9(2):141-145(in Chinese) [9] 周长发. C#数值计算算法编程[M]. 北京:电子工业出版社,2007:123-124 Zhou Changfa. C# numerical value computation and algorithm programming[M]. Beijing:Publishing House of Electronics Industry, 2007:123-124 (in Chinese) -
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