基于C值辅助B值的故障检测算法研究  

B-Values Fault Detection Algorithm Based on C-Values

作　　者：徐轲[1] 赵修斌[1] 庞春雷[1] 余永林[1] 王祝欣[2] 

机构地区：[1]空军工程大学信息与导航学院 [2]中国人民解放军93115部队

出　　处：《电光与控制》2016年第6期72-76,共5页Electronics Optics & Control

基　　金：国家自然科学基金(61273049)

摘　　要：多基准一致性检测中的B值处理是卫星着陆系统完好性监测的核心。针对传统的B值处理算法存在对故障来源不敏感、难以区分卫星故障与接收机故障的问题,研究了基于C值辅助的B值处理改进算法。新算法采用极大似然估计准则,构造以卫星为基准的C值,并设置相应阈值,分析和比较C值的变化情况,结合B值处理,综合分析可能存在的故障情况。实验结果表明,基于C值辅助的B值处理能够很好地反映卫星故障,提高了系统的可用性水平。B-values analysis and processing in multiple reference consistency check is critical for integrity monitoring of GNSS landing system.Considering the problems of the traditional processing method that it is not sensitive to the sources of failure and it is difficult to judge whether the failure comes from the satellite or the receiver,we studied the improved B-values fault detection algorithm based on C-values.The new processing method uses the rule of maximum likelihood estimation,and by fabricating C-values based on satellite data,setting up the relevant threshold values,and analyzing and comparing the variation of C-values,it can make comprehensive analysis to the possible failures based on B-values processing.Experiments show that the new processing method is very effective in fault analysis,especially for satellite faults.Besides,it also improves the level of system availability.

关 键 词：卫星着陆系统 完好性监测 故障检测 B值 C值 

分 类 号：TN967.1[电子电信—信号与信息处理]