Real-time Estimation of Time-varying Magnetometer Errors for Small Satellite Missions

实验得出结论，清楚地了解了磁强计误差的时间变化取决于不同的误差源，如铁磁材料附近。时间变化是最可观察到的磁强计偏置项。针对小卫星磁强计标定中最具挑战性的问题，提出了一种将磁强计标定和姿态估计功能集成在一个算法中的小卫星磁强计真实的实时标定算法。设计了另一种与姿态无关的利用陀螺测量的真实的全时磁强计标定算法。研究成果正在准备在期刊上发表。

Experiments are concluded with a clear understanding about the time-variation of the magnetometer errors depending on different error sources such as ferromagnetic materials nearby. Time-variation is most observable on magnetometer bias terms. Isolating the experiment setup from the environment effects on Earth and mimicking the space environment was the most challenging task to get healthy experiment data.The experiment data is used to evaluate a real time magnetometer calibration algorithm for small satellites that integrates sensor calibration and attitude estimation functions in a single algorithm. Another attitude-independent real time full magnetometer calibration algorithm that uses gyro measurements is also designed. Research results are being prepared for journal publication.