基于光纤陀螺寻北仪误差模型和光纤陀螺的误差特性，从理论上对光纤陀螺寻北仪寻北误差进行了分析，提出寻北仪主要包括系统误差和器件误差两个方面的误差源，并分别对不同误差源引起的寻北误差进行推导，得到光纤陀螺寻北仪寻北精度主要受陀螺零偏漂移、安装误差和转台测角精度决定的结论。对光纤陀螺寻北仪各误差源引起的寻北误差进行仿真实验，在考虑系统误差的条件下，0.01°/h精度的光纤陀螺寻北误差最大可达0.045°,实验结果证明了理论分析的正确性。

Based on the error model of FOG north-seeker and error characteristics of FOG, the north seeking error of FOG north-seeker is analyzed in theory , and the error sources of north-seeker which include system error and device error are put forward. The north seeking error caused by different error sources is deduced as well. It is conduded that the north seeking precision of FOG north-seeker mainly depends on gyro drift, installation error and angle measurement accuracy. Simulation experiment is made on north seeking error caused by various error sources of FOG North-seeker. Considering system error, the north seeking error could be 0.045° when using 0.01°/h FOG. The experimental results show the validity of the theoretical analysis.