正弦加速度激励下石英加速度计的标定方法

In order to more fully excite error coefficients of higher-order terms in the accelerometer error model, a test method using a precision centrifuge to generate a dynamic acceleration excitation is proposed. Firstly, by analyzing the error source of the centrifuge, the intrinsic relationship between the sinusoidal angular velocity of the centrifuge spindle, the attitude error of the centrifuge, the installation error of the accelerometer and the precise specific force input of the accelerometer are established. Meanwhile, the complete error model of accelerometer including tool errors of the centrifuge is established. Secondly, a three-position test method for error model identification is proposed, and the error coefficients of acceleration error model and instrument error of test equipment are identified by the least square method. Compared with traditional calibration methods, the calibration efficiency is greatly enhanced by reducing the installing positions of the accelerometer from ten to three. The simulation results show that the influence of centrifuge tool error and accelerometer installation error on the calibration accuracy of the accelerometer error model is eliminated in the identification of higher-order parameters, and the identification accuracy of the error model coefficient can be controlled within 5%.