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为了研究精密离心机自身误差对陀螺加速度计模型系数标定精度的影响,分析了离心机各个误差源,从输入比力和相对惯性空间角速率两个方面讨论了离心机误差源对加速度计参数标定的精度影响,给出了被试加速度计输入加速度和角速度的精确表达式。应用最小二乘法对误差模型参数进行辨识,且计算了在各误差源作用下对于参数辨识精度的影响程度。根据仿真结果,找出了某些离心机误差对加速度计误差系数标定的影响关系,为按照加速度计的标定精度来确定离心机的精度打下了理论基础。
In order to study the influence of the error of the precision centrifuge on the calibration accuracy of the model coefficient of the gyro accelerometer, the error sources of the centrifuge are analyzed. The calibration of the parameters of the accelerometer is discussed from two aspects of the input force and the relative inertial space angular rate The exact expression of accelerometer input velocity and angular velocity of the accelerometer is given. The parameters of the error model were identified by using the least square method, and the influence of each error source on the accuracy of parameter identification was calculated. According to the simulation results, the influence of some centrifuge error on the calibration of the error coefficient of the accelerometer was found out, which laid a theoretical foundation for determining the precision of the centrifuge according to the calibration accuracy of the accelerometer.