加速度计的离心加速度场翻滚校准方法

Tumbling calibration method for accelerometer in centrifugal acceleration field

针对现有加速度计校准方法的不足,提出了一种在大于1g的离心大加速度激励下加速度计的多位置翻滚校准方法。建立了加速度计在离心加速度场翻滚校准的数学模型,研究了加速度计的离心加速度场翻滚校准方法,给出了离心加速度场翻滚校准步骤,并采用石英加速度计进行了离心加速度场的十二位置等多位置翻滚校准试验,获得了大g值激励下加速度计的安装误差、交叉耦合系数等模型方程系数。采用本方法进行校准,校准状态更接近加速度计实际使用状态,因而校准获得的模型方程系数用于修正后,将提高加速度计的测量精度。

Aiming at the shortcomings of the existing accelerometer calibration methods, a multi-position tumbling calibration method of accelerometer under the centrifugal acceleration of 〉1g is proposed. First, the mathematical model of accelerometer tumbling calibration in centrifugal acceleration field is established. Then, the method of tumbling calibration in centrifugal acceleration field of accelerometer is studied, and the step of tumbling calibration in centrifugal acceleration field is given. At last, a quartz accelerometer is used to implement multi-position （including 12-position） tumbling calibration tests in the centrifugal acceleration field, and the accelerometer＆#39;s model equation coefficients of installation error, cross-coupling coefficient, etc. under a largeg value excitation are obtained. The calibration state with the proposed method is more close to the actual using state of the accelerometer, and the model equation coefficient obtained by calibration can be used to correct the measurement accuracy of the accelerometer after it is calibrated by centrifugal acceleration.