Calibration Method and Error Analysis for Multi-Positional Method on Centrifuge of Gyroscope’s Drift Coefficients
Abstract: In order to calibrate the drift coefficients of gyro precisely, in the paper, the coordinate systems on precision centrifuge with counter-rotating platform were established, and the positional relationships were analyzed in consideration of centrifuge errors. The accurate angular velocity along each axis of gyro was derived by using homogeneous transformation method and the nominal value of input specific force was given, and each harmonic amplitude expression containing drift coefficients of gyro was derived combining the static error model of gyro. The output at each sampling time of gyro was acquired by providing two centripetal accelerations on centrifuge, and each harmonic amplitude’s value was calculated by using harmonic analysis, thus each drift coefficient could be identified by least squire evaluation. The simulation results show that the method using the counter-rotating platform can avoid the centrifuge errors’ influences and the errors mainly impact on the DI, DS and Dos significantly which should be precisely calibrated in consideration of centrifuge errors; and the errors have no impacts on other coefficients. In real calibration, the perpendicularity between rotating axis of counter-rotating platform and the disk surface, the wobbles of rotating axis of counter-rotating platform and the difference between the angular rate of counter-rotating platform and the main axis should be measured precisely in order to meet the requirement.
文章引用: 王世明 , 高晓东 (2016) 陀螺仪漂移系数的多位置离心机标定方法及误差分析。 动力系统与控制， 5， 71-79. doi: 10.12677/DSC.2016.53008
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