Accurate calibration for drift of fiber optic gyroscope in multi-position north-seeking phase |
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Institution: | 1. Department of Systems and Control, Instituto Tecnológico de Aeronáutica, 12228-900 São José dos Campos, SP, Brazil;2. INSPER Instituto de Ensino e Pesquisa, 04546-042 São Paulo, SP, Brazil;3. Space Systems Division, INPE Instituto Nacional de Pesquisas Espaciais, 12227-010 São José dos Campos, SP, Brazil |
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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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Keywords: | Inertial measurement unit Fiber optic gyroscope Accelerometer bias North-seeking Calibration |
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