基于线振动台的液浮陀螺仪二次项误差系数标定方法研究

Research on calibration method of the floated gyroscope’s second-order error coefficient based on the linear shaking table

为提高液浮陀螺仪静态误差模型系数中二次项系数的标定精度,提出了线振动台振动整周期的方法来标定液浮陀螺仪。在充分考虑线振动台的寄生转动和垂直度误差,测试时产生的角振动以及陀螺仪的安装误差的基础上,设计了六位置法来标定陀螺仪二次项系数的标定方案。该方法抑制了线振动台的寄生转动、测试时产生的微小角振动以及陀螺仪的安装误差对标定精度的影响,能够提高液浮陀螺仪在线振动台上测试的精度。最后进行了相应的误差分析,验证了该方法能够准确的标定出陀螺仪的二次项误差模型系数,标定精度可达10^-4(°/h/g^2)数量级。

In order to improve the calibration accuracy of the second-order coefficient in the static error model coefficient of the floated gyroscope,the whole vibration period method of the linear shaking table was proposed to calibrate the floated gyroscope.On the basis of fully considering the parasitic rotation and verticality error of the linear shaking table,the angular vibration produced during the test and the installation error of the gyroscope,a calibration scheme of the six-position method was designed to calibrate the second-order coefficient of the gyroscope.This method suppresses the influence of the parasitic rotation of the linear shaking table,the small angular vibration produced during the test and the installation error of the gyroscope on the calibration accuracy,and can improve the measurement accuracy of the floated gyroscope on the on-line shaking table.Finally,the corresponding error analysis was carried out,and it is verified that the method can accurately calibrate the second-order error model coefficient of the gyroscope,and the calibration accuracy can reach the order of 10^-4(°/h/g^2).