机抖激光陀螺随机噪声注入方法研究

Injection method for random noise in dithered ring laser gyro

机抖激光陀螺通过在抖动驱动信号中注入一定强度的随机噪声来消除动态闭锁误差。为了适应机抖激光陀螺小型化和其控制电路数字化的发展,设计了在以抖动驱动信号采用方波形式的基础上,其随机噪声的注入采取了应用寄存器产生的伪随机噪声-m序列按照对方波占空比进行调制的方式,并建立了抖动机构的数学模型,应用所建立的模型通过Matlab中的Simulink进行了仿真。依照随机噪声注入效率的计算方法,文中采用的方式其噪声注入效率要高于以往采用的应用高斯白噪声对交变正弦波驱动信号进行幅值调制的方式,对此进行了实验验证,证明这种随机噪声注入方式效果良好。

To eliminate the dynamic lock-in error in dithered ring laser gyro,it is desirable to inject a pseudo-random noise into the dithered driving signal.The paper developed a new injection method in the dithered ring laser gyro to suit the development of miniaturization and digitalization.The injected pseudo-random noise adopts pseudo-random noise(M sequence) produced by a register and the dithered signal applied square wave.The math model of the dithered system was established and then used in the simulation by the Simulink in Matlab.The new project was proved excellent by the emulator and the experiment of the dither’s system.