基于匀速率26位置法的iIMU-FSAS光纤陀螺仪标定

针对iIMU-FSAS光纤陀螺仪静态26位置法标定结果无法收敛的问题,提出了由外框轴提供稳定转速的匀速率26位置法标定方案,从理论上与静态26位置法进行了对比分析;采用该方法对i IMU-FSAS陀螺仪进行了多天的标定实验,结合静态26位置法有限次迭代的结果,对匀速率26位置法标定参数(零偏、标度因数和安装误差)的合理性和重复性等进行了分析。结果表明:与静态26位置法相比,匀速率26位置法的标定结果不仅能够收敛,且标定结果合理、性能稳定。

iIMU-FSAS FOG calibration based on uniform-rate 26-position method

To solve the non-convergence problem of the static 26-position method in calibrating iIMU-FSAS fiber optic gyroscope,a uniform-rate 26-position method based on 12-parameter error model is proposed,in which the three-axis turntable is required to be able to provide stable angular rate along outer-axis to improve the gyro's input level.To test this new method,the experiments based on the iIMU-FSAS gyroscope are made for several days,and then the rationality and repeatability analysis are made through comparing the calibration results (bias,scale factor and installation error) between the static 26-position method using limited iterations and the proposed method.Experiment results show that,compared with the static 26-position method,the results by the new method is convergent,more reasonable and repeatable.