压电加速度传感器冲击测量中低频失真的理论分析与实验验证

冲击谱是一连续谱,其频谱范围从零到无穷大。由于压电加速度传感器的频率范围有限,在冲击测量中不可避免地会产生频率失真,频率失真包含低频失真和高频失真。压电加速度传感器在冲击测量中的低频失真主要表现为基线不回零。分别从矩形冲击波、锯齿形冲击波和半正弦冲击波引起的传感器响应入手,定量分析了压电加速度传感器冲击测量基线不回零的问题,最后利用落体冲击试验台对理论分析进行了实验验证。

Theoretical analysis and validation of low frequency distortion of piezoelectricity accelerometer for shock measurement

Shock spectrum is a sort of continuous spectrum from zero to infinity.The frequency distortion in the shock waves measurement is inevitable because of the bandwidth limitation of piezoelectricity accelerometer.The performance distortion includes low frequency distortion and high frequency distortion.The low frequency distortion of piezoelectricity accelerometer in the shock measurement mainly presented as non-back-to-zero phenomenon.The phenomenon in the shock measurement with regard to characteristic of re...