一种新的激光陀螺抖动加噪效果评估方法

A New Noise Injection Effectiveness Evaluation Method for Ring Laser Gyro

激光陀螺是一种角运动传感器件,为了避免激光陀螺的闭锁现象,可以采取正弦抖动偏频。为了减小机抖陀螺过锁区时的误差累积,往往会在抖动信号中注入噪声。然而如何选择一种合适的噪声形式目前还没有明确的依据,往往要经过长时间的测试才能得到一种较好的噪声形式。根据加噪的基本原理,提出了一种新的激光陀螺抖动加噪评估方法,这种方法能够在短时间之内快速评价加噪的效果。实际测试验证,新方法在衡量加噪效果上确实是行之有效的。

Laser gyro is an angle sensitive device.In order to overcome the lock-in phenomenon,a sine wave mechanical dither bias is introduced.In order to eliminate the error accumulation in the lock-in traverse moment,random noise is often injected into the dither driving signal.Until now,there is no good rule to select a suitable noise form,and long performance measurement must be carried out to evaluate the effect of noise injection.A new method is proposed,which can evaluate the effectiveness of noise injection in very short time.Results of experiments show that this method is very effective and can be used to select a good noise type.