基于高阶补偿器的加速度传感器动态误差补偿方法

A Dynamic Error Compensating Method Based on High-Order Compensator for Accelerometer

加速度传感器动态特性对其动态测量结果具有重要影响。为了改善加速度传感器动态性能,减小动态误差,提出了一种基于高阶补偿器的加速度传感器动态误差补偿方法,该方法通过建立加速度传感器ARX模型,利用加速度传感器模型极点确定高阶补偿器的阶次,并应用误差白化算法(EWC)获得高阶补偿器的参数,实现加速度传感器的动态误差补偿。实验结果表明,该方法有效改善了加速度传感器的动态特性,且高阶补偿器的补偿效果优于低阶补偿器的补偿效果。高阶补偿器补偿后传感器输出超调量和残差均是低阶补偿后的三分之一,响应时间是低阶补偿后响应时间的一半左右。

The dynamic characteristics of accelerometer play an important role in dynamic measurement. In order to improve the dynamic characteristics of the accelerometer and reduce measurement error,a dynamic compensation method based on high-order compensator is proposed. The dynamic model of acceleration is built using calibration data,and the compensator’s order is determined according to the system’s poles. Error Whiting Calculation（EWC） algorithm is used to identify the parameters of the compensator. The experimental results show that the high-order dynamic compensator,compared with the low-order compensator,has some advantages such as overshoot,arriving stable time and residual,and all of these indicators are reduced.