光纤陀螺寻北仪的转位控制方案设计与实现

Design and Realization of the Turning Control Scheme of FOG North Seeker

光纤陀螺寻北仪利用光纤陀螺测量地球自转角速率的水平分量来获得被测点的北向信息，利用加速度计测量固定陀螺的基座的倾斜角度，经过解算得到载体的参考轴与真北方向的夹角。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陀螺寻北的精度要求。文中详细介绍了光纤陀螺寻北仪的组成、转位控制方案设计及其实现途径。实验证实采用光电编码器作为直流电机位置控制的反馈元件的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 and the tilt angle of the base measured by accelerometer, 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 device must meet the requirement of seeking north. The components of FOG north seeker, together with the turning control scheme and its implementation, are introduced in detail. The experiment verifies the turning device, which adopts the output of photoelectric encoder as position feedback signal, can meet the requirement of seeking north in FOG north seeker.