研究了与光纤线圈平面平行的径向磁场作用下光纤陀螺的磁敏感性，分析了径向磁敏感性的主要机理是光纤扭转。基于此提出了利用补偿光纤环来抑制陀螺的径向磁敏感性的方法，通过控制补偿光纤的扭转分布特性，产生一个可控的补偿相位来抵消原有光纤环的径向磁敏感性误差。建立了补偿相位、径向磁敏感度与光纤扭转分布特性关系的数学模型，并对该模型进行了数据模拟和实验验证。通过定义补偿效能评估了径向磁敏感性的抑制效果，实验结果可以看出，径向磁敏感性补偿效能达到了63.76%，综合磁敏感性补偿效能达到了42.83%，表明该方法可以在一定程度上可以抑制光纤陀螺的径向磁敏感性。

The magnetic sensitivity of fiber-optic gyroscope (FOG) in radial magnetic field, which is parallel to optical fiber coil plane, is studied. The optical fiber twist, which is the main mechanism of the radial magnetic sensitivity, is analysed. Based on this mechanism, the use of compensation fiber ring to inhibit FOG radial magnetic sensitivity is proposed. By controlling the twist characteristics of the compensation optical fiber, a controllable phase is introduced to offset the radial magnetic sensitivity error of the original optical fiber ring. The model of the relationship between the compensation phase, radial magnetic sensitivity axis associated and the twist characteristics of optical fiber is established. The data simulation and experiment are carried out. By defining the compensation efficiency, inhibition effect of the radial magnetic sensitivity is evaluated. In experimental results, radial magnetic sensitivity compensation efficiency is 63.76%, and the synthesized magnetic sensitivity compensation efficiency is 42.83%. To a certain extent, this method can inhibit the radial magnetic sensitivity of FOG.