基于多假设解分离算法的BDS/SINS紧组合完好性监视

Integrity Monitoring of Tightly integrated BDS/SINS Navigation System Based on Multiple Hypothesis Solution Separation (MHSS)

摘要:

完好性是民航基于性能的导航（PBN）运行的关键性能要求，是导航安全性的重要支撑。北斗导航系统（BDS）/惯性导航系统（SINS）紧组合导航系统将SINS信息加入到完好性监视中，增加了冗余信息，通过多假设解分离算法进行故障卫星的检测与隔离，满足民航特定飞行阶段高完好性要求。论文利用BDS接收机接收到的BDS卫星数据，通过设置飞行轨迹，模拟卫星故障，对BDS/SINS组合导航系统的完好性算法进行测试验证。实验结果表明，基于多假设解分离方法的BDS/SINS紧组合导航系统可以较好地实现故障卫星的检测与隔离，保护限计算符合预期。

Abstract:

Integrity is the key navigation performance requirement of civil aviation Performance Based Navigation (PBN) operation and an important support for navigation safety. SINS information is added to tightly integrated BeiDou Navigation Satellite System(BDS)/ Strapdown Inertial Navigation System(SINS) monitoring function, increases redundant information which makes outage satellite detection and exclusion more effective. Using multi-hypothesis separate solution algorithm, the tight coupled BDS/SINS navigation system would provide more reliable integrity information which helps to meet the high integrity requirements in specific flight phases. We used BDS satellites’ data received by BDS receiver to test and verify the integrity algorithm by setting flight trajectory and adding errors to the satellites in this paper. The experimental results show that the BDS/SINS tightly integrated navigation system based on multi-hypothesis separate solution method can detect and exclude outage satellites effectively, and the calculation of protection limit is in line with expectations.