基于改进UKF的小卫星磁测定轨方法  

Small Satellite Magnetic Autonomous Orbit Determination Based on a Modified UKF

作　　者：苗赢[1] 孙兆伟[1] 

机构地区：[1]哈尔滨工业大学卫星技术研究所,黑龙江哈尔滨150080

出　　处：《飞行力学》2007年第1期93-96,共4页Flight Dynamics

基　　金：国家863计划资助项目(2004AA714010)

摘　　要：针对小卫星设计简单、功耗低的特点,提出一种利用三轴磁强计测量信息实现卫星磁测自主定轨的方法。为了提高自主定轨的计算效率,采用基于球体单形ε点采样的改进UKF(Unscented Kalman Filter)作为处理自主定轨的滤波算法。最后对这种定轨方法进行了仿真试验,结果表明,该滤波算法能有效保证收敛的速度和定轨精度。Considering the design of a small satellite requests simply and low power, this article proposes an approach to autonomous orbit determination by using the measurement of a 3-axis magnetometer. In order to elevate the efficiency of computing, the paper chooses the UKF, which is based on the spherical simplex ε point selection strategy, for the autonomous orbit determination. Mathematical simulation is done to this approach, the simulation results show that the magnetic navigation algorithm using the spherical simplex ε point selection UKF is astringent and accurate.

关 键 词：自主定轨 磁强计 球体单形采样 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]