高精度液浮陀螺仪在双轴转台上的标定方法与误差分析

To improve the calibration accuracy of a floated gyroscope on a two-axis turntable, the calibration model of the gyroscope on the two-axis turntable is established by introducing the two-axis turntable errors, gyroscope installation errors and gyroscope static error model. The gyroscope's calibration schemes are established by the 16-position and 20-position methods in the gravity field of 1g respectively. Then the error model coefficients are calibrated by the error separation method and the least square method. Compared with the 8-position method, the floated gyroscope's calibration accuracy can be improved by avoiding or compensating for the turntable errors automatically and eliminating the influence of the gyroscope installation errors which are difficult to be measured. Moreover, the error analysis implies that the two multiple-position calibration methods can improve the calibration accuracy of the floated gyroscope effectively.