摘要
当GPS卫星存在故障时,必须在故障污染系统之前将其检测并隔离,因此完好性是SINS/GPS组合系统的一个重要性能指标。针对SINS/GPS紧耦合系统,利用新息外推法和层次滤波器结构,分别实现卫星故障的快速检测和隔离。通过与新息检测法进行对比仿真表明,新息外推法比新息检测法能更快地检测慢变故障,但对阶跃故障检测的灵敏度没有新息检测法高,最后采用层次滤波器结构实现故障隔离。
GPS satellite failure must be detected and isolated before they influence the integrated system. Integrity is a critical performance index of SINS/GPS integrated navigation system. For SINS/GPS tightly integrated navigation system, rapid detection and isolation of satellite failure are realized respectively with innovation extrapolation method and filter level configuration. Compared to innovation detection method, the simulation results show that the innovation extrapolation method can detect slowly growing errors （SGEs） more quickly, but with lower detecting sensitive to step failure. Finally tfailure isolating was realized by filter level configuration.
出处
《导弹与航天运载技术》
北大核心
2013年第2期55-59,共5页
Missiles and Space Vehicles
基金
国家自然科学基金(51175510)
航空科学基金(20100818017)
关键词
完好性
组合导航
新息外推法
层次滤波器
Integrity
Integrated navigation
Innovation extrapolation method
Filter level configuration
