摘要
By studying the thermal-induced phase shift mechanism of an interferometric fiber-optic gyroscope （IFOG） sensing coil, a novel generalized expression based on a three-dimensional （3D） model is proposed. Compared with the traditional pure Shupe effect model, the simulation results show that the new 3D model, including elastic strain and the elasto-optical effect, can describe the thermal effect of the coils more accurately. Experiments with temperature change rates between -40℃ and 70℃ are performed to verify the effectiveness of the proposed generalized expression. The results of our work can guide researchers in identifying countermeasures to reduce the thermal-induced bias error in IFOG.
By studying the thermal-induced phase shift mechanism of an interferometric fiber-optic gyroscope （IFOG） sensing coil, a novel generalized expression based on a three-dimensional （3D） model is proposed. Compared with the traditional pure Shupe effect model, the simulation results show that the new 3D model, including elastic strain and the elasto-optical effect, can describe the thermal effect of the coils more accurately. Experiments with temperature change rates between -40℃ and 70℃ are performed to verify the effectiveness of the proposed generalized expression. The results of our work can guide researchers in identifying countermeasures to reduce the thermal-induced bias error in IFOG.
基金
supported by the National Natural Science Foundation of China(No.51205074)
the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20112304120007)
the Harbin Specialized Research Foundation for Innovation Talents(No.RC2012QN009037)
