基于磁强计的微小卫星姿态确定

针对极轨微小卫星，提出了一种基于磁强计的改进EKF算法。通过对仅利用磁强计确定卫星姿态时的误差来源进行分析，并且对磁强计量测模型做出了改进，并进行了适当的简化。在不明显影响精度的情况下，使得计算量得到了显著降低，数学仿真表明算法是收敛的、有效的。该算法具有极大的工程实用意义，对于EKF方法在低成本微小卫星的成功应用是一个有益的探索。

Micro-Satellite Attitude Determination Based on Magnetometer

To the pole orbit micro-satellite, this paper provides a modified EKF arithmetic based on magnetometer individually. The error source of satellite attitude determination with magnetometer is analyzed and magnetometer measure model is modified. Some reductions have been adopted. Premised the less loss of the attitude determination accuracy, the consumption of algorithmic calculation have been improved dramatically. According to the simulation results, the arithmetic is convergent tendency and effective, which also shows profound meaning to the engineering application. This paper can be seen as a positive exploration to the EKF method for low cost micro-satellite.