Calibration of cross quadratic term of gyro accelerometer on centrifuge and error analysis

In order to calibrate the cross quadratic term of gyro accelerometer on precision centrifuge precisely and effectively, the original mechanism of cross quadratic term is analyzed at first, then the calibration model of gyro accelerometer on centrifuge is established, and the calibration method is designed afterwards. Based on the method, the precise input specific force and input angular rate of gyro accelerometer tested on centrifuge are given, and the dynamic errors of centrifuge are compensated, simultaneously the static errors of centrifuge are restrained. Applying this method in real calibration, the cross quadratic term is identified successfully which improves the calibration accuracy of second-order coefficient, and finally the effectiveness of method is verified through error analysis.