Abstract
This paper presents an accurate calibration method for drift of fiber optic gyroscope (FOG) in multi-position north-seeking phase. To avoid the effect of the rate of change of accelerometer bias on the drift estimate of FOG, north-seeking by coarse-alignment is performed in multi positions and the north-seeking results are used to compute the drift of FOG. The laboratory test results prove that the proposed method can not only achieve multi-position north-seeking, but also accurately calibrate the drift of FOG. The comparison with the traditional method highlights the superior performance of the proposed method.
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