抖动偏频激光陀螺中的解调及实现技术

Demodulation and Implementation of Dithered Ring Laser Gyro

根据抖动偏频激光陀螺的输入、输出信号模型 ,提出了一种利用实时数字信号处理技术实现抖动解调的新方法。通过对激光陀螺输出信号高速采样并使用设计适当的数字滤波器 ,不但可以有效消除机械抖动引起的信号 ,而且能够减小随机噪声干扰 ,提取出所需的惯性角速率信息。试验表明 ,相对于整周期采样解调 ,此方法有效减小了误差 ,提高了陀螺输出带宽 ,降低了对电路的要求 。

Based on the input and output signal models of the dithered ring laser gyro,a new method of dithered demodulation by using real-time digital signal processing technology is proposed.By sampling with high speed and filtering the outputs of laser gyro,this method can remove the signal caused by dither,and reduce the random noise and get the inertial angular rate needed.The experimental results indicate that compared with whole cycle sampling demodulation,the method proposed in this paper can effectively reduce errors,extend the band-width of gyro and require the circuits with less complexity.And it is proved that it is of high value in practice.