多方向振动加速度整流误差中非整周期采样的影响

Non-integer-period Sampling Influence on Rectification Errorof Multi-directional Vibration Accelerometer

为了评价非整周期采样对加速度计整流误差的影响,在以整周期采样对振动加速度整流误差分析方法的基础上,建立了非整周期采样对单方向振动加速度引起整流误差的数学模型,通过计算各个方向振动信号的平均值,推导了非整周期采样下多方向振动加速度引起整流误差的数学模型,并对该模型进行分析,给出了减小非整周期采样对整流误差影响的方法。在仿真中,引入整流误差的相对测量误差进行验证,证明了非整周期采样下单方向振动加速度和多方向振动加速度整流误差模型的有效性。

To evaluate the influence of non-integer-period sampling on rectification error caused by vibration acceleration,the mathematical model of rectification error caused by singal directional vibration acceleration under non-integerperiod sampling is established.By calculating the average value of vibration signals in all directions,the mathematical model of rectification error caused by multi-directional vibration acceleration under non integral period sampling is deduced.Based on the analysis of multi-directional vibration acceleration model,an approach to reduce the influence of non-integer-period sampling on rectification error is given.In simulation,the relative measurement error of rectification error is introduced to verify the effectiveness of the rectification error model of unidirectional vibration acceleration and multi-directional vibration acceleration under non-integer-period sampling.