利用分段回归拟合激光陀螺仪零偏测试的Allan方差

Calculation of Allan variance for the bias test of the ring laser gyros by using the piecewise regression method

在介绍Allan方差方法的基础上,计算出了激光陀螺仪零偏测试数据的Allan方差。首次利用分段回归方法拟合Allan方差数据,得到了零偏测试中的各误差源系数。结果表明,该方法能有效地辨识出存在于激光陀螺仪零偏测试中的各种噪声,极大地降低了激光陀螺仪Allan方差数据处理的难度。指出了激光陀螺硬件中存在的误差,提出了激光陀螺仪的改进方案。

On the basis of Allan variance method, the Allan variance for zero drift signal of ring laser gyros（RLG） is calcu- lated. It is the first time that the five coefficients of error source are acquired by using the piecewise regression method. The results show that this method can effectively evaluate the all kinds of noise in RLG＇s drift test and extremely reduce the difficulty for data analyzing of Allan variance. The error parts in hardware are found. The scheme to improve the performance of RLG is proposed.