摘要
本文研究了基于地磁场的自主导航,建立了以卫星轨道动力学方程为基础的系统状态方程,并详细推导了以地磁场矢量为观测量时的观测方程;为了解决系统的非线性问题把常用来解决非线性问题的UKF引入到基于地磁场的自主导航系统中;最后,用Matlab对基于地磁场的自主导航系统进行了仿真,仿真结果表明UKF有很好的收敛性和稳定性。
Autonomous navigation using geomagnetic field was studied in the paper. The system state equations based on the dynamic equation of satellite orbit were built, and the observation equations with geomagnetic field vector as the observable were derived in detail. To solve the nonlinear problem of the system, the UKF method for nonlinear system was introduced into the autonomous navigation system using geomagnetic field. At the end simulations were made on the autonomous navigation system using geomagnetic field with Matlab. The results showed that the UKF had Rood performance in stability and convergence.
出处
《测绘科学》
CSCD
北大核心
2011年第6期103-105,共3页
Science of Surveying and Mapping
基金
国家自然科学基金(40774031)
关键词
地磁导航
自主导航
UKF
地磁场模型
geomagnetic navigation
autonomous navigation
UKF
geomagnetic field model
