Calibration of three-axis magnetometer diversionary error based on equipment and LMS adaptive algorithm
2010
Bias of magnetometers and target total value is obtained precisely via calibration equipment. Then, real time calibration
weight matrix is obtained using LMS adaptive algorithm. It is proved through experiment that bias is obtained with good
stability and accuracy compared with parameter estimation; after calibration, diversionary error is reduced from 33nT to
4nT. Furthermore, diversionary error is calibrated well using a proton magnetometer without rotating the magnetometer
over one circle. Experiment results show that it not only reduces diversionary error fluctuation but also eliminates system
error compared with other methods.
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