摘要
针对现阶段北斗卫星导航系统的星座布局与GPS有较大不同的现实,提出了一种基于北斗伪距观测量的SINS/北斗紧耦合方法。首先,模拟了北斗卫星导航系统5GEO+5IGSO+4MEO的星座,之后利用模拟的北斗星座以及SINS输出进行了仿真。仿真结果表明,在当前北斗星座布局下,在我国东部某地区可见卫星数目大部分时候为78颗,紧耦合方法的位置精度优于10m,速度精度优于0.05m/s,北斗钟差估计精度优于10ns,钟漂估计精度优于1×10-10。
Aiming at the fact that the constellation of BDS is different from that of GPS,a SINS/BDS tightly-coupled integration method based on raw pseudo-range measurements of receivers is put forward.Firstly,a constellation of "5GEO+5IGSO+4MEO" is simulated,and then simulations are conducted by utilization of simulated BDS constellation and SINS.Results of simulations show that with current constellation the number of visible satellites in somewhere of eastern China is most commonly from 7 to 8.Results of simulations also show that,the accuracy of position is less than10 m,the accuracy of velocity is less than 0.05m/s,the accuracy of BDS receiver clock bias estimation is less than 10 ns,the accuracy of BDS receiver clock drift is less than 1×10-10.
出处
《导航与控制》
2015年第4期83-88,共6页
Navigation and Control
基金
海军重点预研项目(编号:401010301)
关键词
捷联惯导
北斗
组合导航
紧耦合
伪距观测
SINS
BDS
integration navigation
tightly-coupled
pseudo-range measurement
