在实际寻北过程中,寻北仪航向效应使寻北精度大大下降。在介绍光纤陀螺(FOG)寻北原理的基础上,提出大倾角下的光纤陀螺四位置寻北方法,对解算出的方位角进行了象限判别;从理论上分析了四位置寻北法在0°~360°范围内的航向效应,研究其误差补偿方法,得出陀螺仪敏感轴指向南北方向时寻北航向效应误差最大的结论。通过仿真验证了寻北方案、理论分析和补偿方法的正确性和有效性。

The actual north seeking precision has declined significantly due to heading effect of north seeker. On the basis of introducing the principle of FOG north-seeker, the method of FOG four position north seeker under the large angle of inclination was given. Aiming at the calculated azimuth, the quadrant distinguishing method was proposed. Meanwhile, the heading effect of fourposition north seeking method in the range of 0 to 360 degrees was analyzed theoretically with a presentation of error compensation method. The conclusion was obtained that the largest error of north seeker heading effect exists with the sensitive axis of gyroscope pointing to north and south directions. Finally, the correctness and validity of the north-seeking method, the theoretical analysis and the compensation method were proved through simulation.