为了简化标定设备,降低标定成本,该文研究了利用双轴位置转台进行光纤陀螺惯组混合标定的可行性。通过分析加速度计和陀螺的标定原理,提出了一种快速六位置标定方案。利用地球重力加速度和自转角速度对加速度计和陀螺进行误差激励,完成标定。首先建立了标定模型,其次设计了位置编排方案,最后进行了实验验证。实验结果表明,快速六位置法能实现加速度计和陀螺误差参数的快速标定,其中标度因数的标定精度与传统方法基本一致,安装误差和常值漂移的精度相对于传统标定方法有所降低,但满足低精度的光纤陀螺惯组的使用要求;同时,与传统标定方法相比,其标定时间由4.5h减少至2h。
To simplify the calibration equipment and reduce the calibration cost,the feasibility of mixed calibration about FOG strapdown inertial navigation system(SINS)by using the two-axis position turntable was investigated in this paper.By analyzing the theory of calibration of accelerometer and gyroscope,aquick six-position calibration scheme was presented.It takes advantage of earth gravity and angular velocity to stimulate the error of accelerometer and gyroscope to complete calibration.Firstly,the error model of calibration was established Then,the position arrangement scheme was designed.Finally,the experimental verification was carried out.The results show that the fast six-position method can realize the fast calibration of accelerometer and gyroscope,and the result of scale factor is consisitent with the standard degree factor of traditional calibration precision.Although the value of installation error coefficients and constant has reduced compared with the conventional calibration,it still can meet the requirement of low precision-fiber inertial measurement unit(IMU),while the calibration time was reduced from 4.5hto 2h.