零锁区激光陀螺空间异面孔系投影角测量误差分析

针对异面腔零锁区激光陀螺深小孔系测量中准确性和稳定性差的问题，分析了异面腔零锁区激光陀螺深小孔测量中误差产生的原因。建立了倾角误差对空间异面孔系投影角的影响方程，发现空间异面孔系的倾角变化会改变投影角，当倾角为16时，倾角误差会以30%的分量加权到投影角误差中，并采用UG软件进行了仿真验证。采用最小二乘拟合的方法分析了影像测量仪的采点误差对角度的影响，发现了增加测量点数由2点增加到10点，超大采点误差的影响会减少至原来的50%。该方法增加了零锁区激光陀螺测量的稳定性。

Measurement error for projective angle of spatial out-of-plane hole system in zero-lock laser gyro

In order to improve the accuracy and stability in the measurement of slightness hole system in zero-lock laser gyro cavity，the main error in the measurement of slightness hole system in out-of-plane zero-lock laser gyro was analyzed. The expression of the effect of inclination error on the projective angle of spatial out-of-plane hole system was built. It was found that the variation of inclination of spatial out-of-plane hole system could change the projective angle , when the inclination was 16 °，30% of the inclination error weighted in the projective angle error，and it was verified by UG software. Moreover, the effect of measuring point error from video measurement instrument on projective angle was analyzed with the method of least square fitting, and it was found that increasing the measuring points from 2 to 10 could reduce the influence of “super” error by 50%. Results show that this method increases the stability of the zero-lock laser gyro measurement.