Calibration method of quartz accelerometer on dynamic centrifuge

This paper proposes a novel method for calibrating error coefficients of the quartz accelerometer faster on the dynamic centrifuge, which can generate a continuous dynamic acceleration excitation. Firstly, working principle and structure of the dynamic centrifuge are analyzed, the error sources and the uncertainty of the dynamic centrifuge are expounded, and relevant coordinate systems are established. Then, according to the characteristics of the input specific forces and the propagating methods of the error sources, the accurate input specific forces acted on the input reference axes of accelerometer are obtained. Based on the calibration error model of the accelerometer, the corresponding dynamic calibration method is proposed. Finally, the second-order and high-order coefficients of the acceleration error model are calibrated, and the calibration precision of the coefficients is analyzed. Compared with traditional calibration methods, the method proposed in this paper not only greatly enhances the calibration efficiency by reducing the installing positions of the accelerometer, but also separates the centrifuge errors from the outputs of the accelerometer, which improves the accuracy and efficiency of the calibration method simultaneously.