UKF在基于地磁场的自主导航中的应用  

Application of UKF in geomagnetic field based autonomous navigation

作　　者：王向磊[1] 丁硕 苏牡丹 

机构地区：[1]信息工程大学测绘学院 [2]61081部队 [3]63999部队

出　　处：《测绘科学》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)

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.

关 键 词：地磁导航 自主导航 UKF 地磁场模型 

分 类 号：P228[天文地球—大地测量学与测量工程]