光纤陀螺寻北仪四位置转位机构设计及其控制

Design and Controling of the Four-position Turning Mechanism of FOG North Seeker

光纤陀螺(FOG)寻北仪利用光纤陀螺敏感地球自转角速率的水平分量,经解算获得载体参考轴与北向的夹角。转位控制方案设计是寻北仪系统设计中一个极其重要的环节,转位机构的转位精度必须满足寻北的精度要求。该文详细介绍了光纤陀螺寻北仪转位机构设计、实现途径以及对寻北精度的影响。实验证实采用多位置转位机构达到了系统寻北的精度要求。

In a FOG north seeker,by using the horizontal components of the earth rotation rate sensed by FOG,the intersecting angle between the geographic north and the reference axis of the vehicle can be calculated accurately.The design of the turning control scheme is more important than others in overall design of the north seeker.The accuracy of the turning mechanism must meet the precision requirement of seeking north.In the paper,the design of the turning mechanism and its implementation of the FOG north seeker,and the influence of the north-seeking precision are introduced in detail.The experiment verifies that the multi-position turning mechanism can meet the precision requirement of seeking north in FOG north seeker.