摘要
为了降低自主导航的成本,针对近地轨道地磁场的特点,提出基于扩展卡尔曼滤波器的地磁导航算法,该算法综合IGRF模型建立了观测方程,根据地磁场的IGRF模型是基于地心固连坐标系的位置函数的特点,采用地心固连坐标系的卫星轨道动力学方程作为状态方程,构造出卫星地磁导航系统的导航模型。仿真研究结果表明,该算法的卫星地磁导航模型结构简单,描述能力更强,导航算法具有较好的稳定性和收敛性。
Considering the characteristic of the geomagnetic field near-earth orbit, an EKF-based magnetometer satellite orbit determination algorithm is proposed to reduce the expense of the autonomous navigation. To form a navigation model for the magnetometer-based satellite navigation system, the algorithm establishes the observation equation by IGRF model and establishes the status equation by adopting the stellite orbit motion equation with the earth-fixed coordinate which associates with the IGRF model by the position function. Simulation results show that the model has simple structure, strong capability of description and the algorithm is more reliable and astringency.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2004年第9期1236-1238,1281,共4页
Systems Engineering and Electronics
