改善激光陀螺输出特性的随机噪声注入方法

A Method for Improving the Performance of Ring Laser Gyro by Injecting the Multi-Cycles Step Noise with White Noise

为消除机械抖动激光陀螺的动态闭锁误差,基于闭锁误差累积角特性的分析和研究,提出了多抖动周期阶梯噪声叠加白噪声的激光陀螺随机噪声注入新方法。理论分析表明,向机械抖动装置中注入的多抖动周期阶梯噪声能使激光陀螺输出信号在整周期采样过程中具有很好的零偏稳定性,而一定强度的高斯白噪声可以减小阶梯噪声在随机常值时间内产生的积累性误差。仿真实验结果验证了多抖动周期阶梯噪声叠加白噪声的注入方法优于传统的随机噪声注入法,在减小激光陀螺输出零偏误差至同一个数量级的同时,能够使激光陀螺的零偏稳定性提高2-4倍。

Based on the accumulation of lock-in error, a method for eliminating the dynamic lock-in error by injecting multi-cycles step noise with white noise into the mechanically dithered ring laser gyroscope （RLG） is presented. The theoretical analysis proves that the multi-cycles step noise enhances the bias stability of RLG, as well as some intensity of the Gaussian white noise can reduce the accumulation of lock-in error during the step periods. The simulation experiment results show that this approach is prior to the traditional method in this way. Both methods decrease the bias error to the same orders of magnitude, while the bias stability is improved two or four times by injecting the multi-cycles step noise with white noise.