根据两颗导航星信息估计捷联惯导系统误差的一种方法  

The Method to Estimate the Strap down Intertial Navigation System Error According to Two Navigation Satellites Information

作　　者：杨雪霖 张英[2] 

机构地区：[1]北京航天控制仪器研究所,北京100039 [2]北京航天自动控制研究所,北京100854

出　　处：《航天控制》2014年第5期21-23,28,共4页Aerospace Control

摘　　要：针对高机动短时间飞行的飞行器,介绍了一种根据它相对2颗导航卫星的伪距离和伪速度信息,估计捷联惯导系统定位和定速度误差的方法。考虑到由确定飞行器相对每颗星的径向距离和速度的非线性方程施加的约束,根据这些误差矢量长度最小值的条件确定误差值。用空间解析几何法得出了计算捷联惯导系统误差估值的最终算法,这种算法能给出非线性最小值问题的精确解。Focused on the highly motor driven and short time flying aircraft, a method which estimates the position and velocity error of the strap down inertial navigation system is proposed in this paper according to its fake distance and fake velocity between the two navigation satellites. In view of the restriction which is caused by the unlinear equation of distance and velocity between the fixed aircraft and each satellite, the value of the error is given according to the minimum length condition of these error vectors. With the analyt- ic geometry, the error estimated final method for strap down inertial navigation system is derived. The un- linear minimum problematic exactness result can be obtained by using this method.

关 键 词：导航卫星 捷联惯导系统 误差 估计 解析几何 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]