光纤陀螺标定误差对舰船捷联惯导系统的影响

Influence of fiber optic gyroscope calibration error on ship strap-down inertial navigation system

为降低船用光纤陀螺标定误差对捷联惯导系统的影响,有针对性地提高光纤陀螺各标定参数的精度,采用将光纤陀螺标度因数误差、安装误差和零位误差进行分离的方法,推导出光纤陀螺三种标定误差与舰船角速率误差之间的函数关系,将其分别代入舰船捷联惯导系统姿态误差方程进行误差分析.并将舰船摇摆运动下的导航误差与静止下的导航误差进行比较.研究结果表明:光纤陀螺零位误差等效于光纤陀螺漂移,舰船摇摆运动会激励光纤陀螺标度因数误差和安装误差的标定误差对系统的影响.

To reduce the impact of fiber optic gyroscope （FOG） calibration error on ship strap-down inertial navigation system （SINS） and improve the FOG calibration parameters precision, this paper separated scale factor error, installation error and zero error, deduced the relationship between FOG calibration errors and angular rate errors, and took the angular rate errors to attitude error equation of ship for error analysis. This study compared the navigation error of ship swaying motion to the static navigation error. The results show that the FOG zero error is equivalent to the FOG drift. Ship swaying motion incentives the influence of FOG scale factor en-or and the calibration error to the SINS.