多轴光纤陀螺Y波导间电磁干扰影响分析及抑制方法  

Influence of electromagnetic interference between Y-junctions on multi-axis FOG and its suppression method

作　　者：刘伯晗[1,2,3] 王泽瑾 罗巍 LIU Bohan;WANG Zejin;LUO Wei;无(Tianjin Navigation Instruments Research Institute,Tianjin 300131,China;Laboratory of Science and Technology on Marine Navigation and Control of China State Shipbuilding Corporation,Tianjin 300131,China;Tianjin Key Laboratory of Quantum Precision Measurement Technology,Tianjin 300131,China)

机构地区：[1]天津航海仪器研究所,天津300131 [2]中国船舶集团公司航海保障技术实验室,天津300131 [3]天津市量子精密测量技术重点实验室,天津300131

出　　处：《中国惯性技术学报》2023年第5期495-500,共6页Journal of Chinese Inertial Technology

基　　金：“十四五”装备预研共用技术(5091701021);国防科技基础加强计划重点项目(2021-JCJQ-ZD-060-00-05)。

摘　　要：针对多轴光纤陀螺工作时Y波导间电磁场变化影响零偏稳定性的问题,分析了Y波导间电磁场变化对陀螺零偏稳定性的影响机理并提出了抑制方法。根据多轴光纤陀螺Y波导间的电磁耦合机理,建立了电磁干扰模型,推导出了Y波导两端电压与连接电极的引线长度和轴间距离之间关系表达式。通过优化波导工艺参数、缩短Y波导电极引线长度将Y波导间电磁干扰引起的陀螺零偏稳定性误差降低到0.01°/h内,并进行了仿真和实验验证,实验结果表明Y波导引线方法改进后陀螺零偏稳定性由平均0.038°/h减小到0.0056°/h。实验证明所提方法能有效抑制多轴光纤陀螺Y波导间电磁干扰引起的陀螺零偏稳定性超差问题。Aiming at the problem of electromagnetic interference affecting bias stability between Y-junctions during the operation of multi-axis fiber optic gyroscope(FOG),the mechanism of the influence of electromagnetic is analyzed and the suppression method is proposed.According to the electromagnetic coupling mechanism between Y-junctions of multi-axis FOG,the electromagnetic interference model is established,and the expression of the relationship between the lead length of the connecting electrode,the inter-axis distance of multi-axis FOG and the voltage of the Y-junction is derived.By optimizing the technological parameters of the Y-junction and shortening the lead length of the Y-junction electrodes,the error of gyro zero bias stability caused by electromagnetic interference of Y-junction is reduced to less than 0.01/h°.The simulation and experimental verification are carried out.The results show that the average bias stability is promoted from 0.038/h°to 0.0056/h°,which proves that the proposed method can effectively suppress the out-of-tolerance of bias stability of multi-axis FOG caused by electromagnetic interference between Y-junction.

关 键 词：光纤陀螺 Y波导 电磁辐射 零偏稳定性 

分 类 号：TN253[电子电信—物理电子学]