离心机误差对陀螺加速度计误差模型系数标定精度的影响(英文)

Impacts of centrifuge errors on calibration accuracy of error model coefficients of gyro accelerometer

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 impacts of accuracy centrifuge error on the coefficient accuracy of gyro accelerometer model, all error sources of centrifuge were analyzed. The impacts of centrifuge error sources on the coefficient calibrating accuracy of gyro accelerometer were discussed from the aspect of input specific force and angular rate relative to inertial space. Accurate expres- sions of input acceleration and input angular rate of tested accelerometer were obtained, error model coefficients were determined by using least square method and the impact degree of error sources on coefficient identification accuracy is evaluated in this paper. The relationships between some centrifuge errors and calibration accuracy of error coefficients of accelerometer were established and it builds a theoretical foundation for the calibrating accuracy of accelerometer to decide the accuracy of centrifuge,