激光陀螺的高频读出与自适应滤波方法的研究

Studying of the High Frequency Readout and Processing Method for Laser Gyro

针对三轴激光陀螺捷联惯导系统(LINS)中三个激光陀螺受各自抖动频率限制,读出频带不足且读出信号不同步,导致动态应用精度降低,研究并开发了一种新的环形激光陀螺(RLG)高频读出电路及信号处理方法。方案采用抖动角传感器获取RLG抖动输出结合原始输出信号构成闭环LMS自适应滤波器,通过DSP信号处理,同时用整周期采样的累积输出作补偿。给出了实现的原理框图和滤波算法。经测试,该方法提高了RLG的读出频带,解决了读出信号不同步的问题,并有效减小了RLG的输出信号噪声,提高了LINS的解算精度,为系统在高动态条件下,实现相关数据分析与误差补偿提供了前提和基础。

Aimed at the falling of the dynamic precision and the readout bandwidth limited by the ring laser gyro's(RLG) dither in laser inertial navigation system(LINS),we studied and developed a new high frequency readout circuit and signal processing method,adapted the output of the RLG's dither-angle sensor,the RLG's output and the full-period sampling signal and constructed a closed loop LMS adapted filter.This paper gived the diagram and the arithmetic.Tests showed that the method has quite improved the readout ...