基于环形激光陀螺调制输出的寻北系统

A North-Seeker Based on the Modulation and Output of a Ring Laser Gyroscope

利用环形激光陀螺对角速度输入量具有较高灵敏度的特点 ,提出了一种新型的激光陀螺寻北系统。将一环形激光陀螺垂直安装在水平的恒速转台上 ,使输入轴与台面平行 ,通过测量地球自转角速度的北向分量 ,实现寻北过程。通过与其对称放置的加速度计可以测量出由于轴系安装和系统调平引起的台面倾斜误差 ,从而对激光陀螺的数据输出量进行补偿。同时采用单周期多位置采样技术和多周期重复测量的方法 ,有效地抑制了激光陀螺的测量噪声 ,最大限度地减少了随机误差和系统误差的影响 ,提高了系统的寻北精度 ,适合多种领域的需要。

A novel north-seeker with laser gyroscope is proposed by means of the characteristics that the ring laser gyroscope has a higher sensitivity for the input of angular speed. A ring laser gyroscope is vertically placed on horizontal constant-speed rotary platform and the input shaft is parallel to the platform plane. The north-seeking procedure can be carried out through measuring the northern component of earth rotational angular speed. The slope error of the platform plane caused by axis installation and system leveling can be measured by an accelerometer placed symmetrically with the north-seeker, thus the data output of the ring laser gyroscope can be compensated. At the same time a method with single-cycle plus multi-position sampling and multi-cycle repeated measuring is applied. In this way the measuring noise of the laser gyroscope is effectively inhibited, the influence of random error and system error is reduced to the maximum limit, the north-seeking accuracy of the system is improved. This system is suitable for the demands in many fields.