基于数据迭代的FOG误差参数闭环标定方法

针对光纤陀螺(FOG)误差参数是影响系统导航精度的主要因素,且传统开环标定方法对陀螺零偏、标度因数和安装误差角标定精度不高而制约系统精度进一步提高的现状,提出一种FOG迭代闭环标定方法。该方法分别在捷联惯导系统罗经对准和导航过程中完成对FOG零偏、标度因数、安装误差的标定。利用Matlab建立仿真环境,将传统分立式标定与闭环标定方法得到的仿真结果进行对比,结果表明:提出的闭环标定方法可有效地提高光纤陀螺标定精度。

Closed-loop calibration method for FOG error parameter based on data iteration

Aiming at status that navigation precision is affected by FOG error parameters,and the system precision is difficult to be further improved because of lower calibration precision of gyro zero-offset,scale factor and installation error angle by the traditional open-loop calibration,a novel FOG closed-loop calibration method is proposed.The FOG zero-offset scale factor and installation error angle are calibrated in compass alignment and navigation process of SINS.Simulation environment is built by Matlab.Compared with the traditional open-loop calibration method,simulation results show that the FOG closed-loop calibration method can effectively improve precision of FOG calibration.