高g值加速度传感器的动态建模与校正

摘要

There are large dynamic errors of acceleration sensor during the high g acceleration dynamic testing process.Using the dynam-ic calibration experimental data of acceleration test system of Hopkinson bar,a dynamic mathematical model of the system is established,the dynamic characteristics of the system is find and a dynamic correction digital filter is designed.Simulation results show that the corrected fil-ter can improve the dynamic response of the system and broad the work band width evidently.The time system reaches the steady state is shortened to 10% comparing to the state before the correction and the work band is spreaded for more than eight times.This method can e-liminate the dynamic error and improve the accuracy of the test data efficiently.%高g值加速度动态测试过程中，加速度传感器存在较大的动态误差；运用加速度测试系统 Hopkinson杆的动态校准实验数据，建立了系统动态数学模型，求出了动态特性指标，设计了动态校正数字滤波器；仿真表明该校正滤波器明显提高了系统动态响应的快速性并且拓宽工作频带；系统达到稳态的时间缩短为校正前的10％，工作频带展宽了8倍以上；该方法能有效消除动态误差，提高了测试数据的准确性。