基于动态Allan方差的光纤陀螺稳定性分析

摘要

Aiming at the characteristics that the actual signal of the fiber optic gyroscope is changed in the long time under the condition of the change of the physical properties of the temperature and other devices,the stability analysis of the fiber gyroscope based on the dynamic Allan variance is proposed. The Allan variance of the fiber optic gyro signal is calculated in different time periods,and the non-stationary change of the signal is captured at different time scales to determine the stability of the fiber gyroscope with time.Simulation and experimental data experiments verify the feasibility and effectiveness of this method. The method can be used to analyze the stability of fiber optic gyroscope,which can directly reflect the law of variance of fiber optic gyroscope with time. The stability analysis of fiber optic gyro random signal will no longer be limited to the two-dimensional curve description of Allan variance.%针对光纤陀螺实际信号在长时间内,容易受到温度和其他器件物理性能的改变而变化的特点,提出了基于动态Allan方差的光纤陀螺稳定性分析.在不同时段内分别计算光纤陀螺信号的Allan方差,在不同时间维度捕捉信号的非平稳变化,从而确定光纤陀螺信号稳定性随时间变化规律.仿真和实测数据实验均验证了本文方法的可行性与有效性.本文方法可以用于光纤陀螺稳定性分析,能够直观反映光纤陀螺方差随时间变化的规律,光纤陀螺随机信号的稳定性分析将不再局限于Allan方差的二维曲线描述.