单激光陀螺罗盘寻北误差建模及滤波技术

North-seeker Based on Ring Laser Gyrocompass

传统吊带式陀螺罗盘系统短时间快速寻北精度较低,对环境的适应能力差。为提高陀螺罗盘寻北性能,提出使用单激光陀螺作为测量元件的二位置罗盘寻北方案。考虑到激光陀螺输出数据特性以及陀螺罗盘系统应用条件,通过对激光陀螺误差源进行分析,确定针对陀螺输出数据使用惯性环节滤波和滑动平均的组合滤波方法。以低精度激光陀螺实验数据进行仿真计算。滤波前后信号对比明显,说明滤波方法对噪声信号抑制效果明显;寻北结果达到4′的精度且收敛速度较快,证明了方案的可行性。

The precision of mechanical gyrocompass goes down when the north seeking is in short time, and the flexibility of the environment shifting is not good. To enhance the performance of gyrocompass in north seeking, a scheme based on single ring laser gyroscope is raised in double point＇ s north seeker. Considering the characteristics of data in RLG and the condition of using gyrocompass, after analyzing the error sources in detail, the filter bank constituted by moving average filter and first order inertial filter is used in the system. The simulation is based on data of low precision gyroscope. The data before and after simulation are in stark contract. This proves that the filter bank can keep down the noise. The program to seek north is in short time and the precision is in 4 minutes. This proves the practicability of this method.