双离心机法线加速度计动态校准中三参数余弦算法实现及应用  

Realization and Application of Three-parameter Cosine Algorithm in Dynamic Calibration of Double Centrifuge Linear Accelerometer

作　　者：秦朝俊 QIN Chaojun(Changheng Institute of Metrology&Measuremnent,Beijing 100095,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2020年第2期20-25,共6页Metrology & Measurement Technology

摘　　要：在双离心机的线加速度计动态校准中,三参数余弦算法贯穿在幅频特性、相频特性以及幅值线性度的整个测试中。本文详细描述了三参数余弦算法的概念和推导过程,以及在双离心机线加速度计动态校准数据处理过程中三参数余弦算法的程序实现;介绍了在幅频特性和相频特性中关于采集点的选取方式,降低由于采集点选择方式不同对数据拟合精度造成的影响。选取某型线加速度计为例,利用双离心机进行动态校准,对采集得到的数据点进行曲线拟合并得到测试结果,验证了所编写的三参数余弦算法程序的可行性。In the linear accelerometer dynamic calibration of double centrifuge,three-parameter cosine algorithm runs through the entire test of the amplitude frequency characteristic,phase frequency characteristic and amplitude linearity.This paper describes the derivation process of the three-parameter cosine algorithm,its practical application in computational process of dynamic calibration of double centrifuge linear accelerometer,and the implementation of three-parameter cosine algorithm.And the paper introduces the selection method of collection points in the amplitude frequency characteristic and phase frequency characteristics,so as to reduce the impact of different selection methods on data fitting accuracy.When a linear accelerometer was taken as an example,double centrifuges were used for dynamic calibration,the accelerometer data are collected and calculated to give the fitting curve and the result,verifying the feasibility of the three parameter cosine algorithm program.

关 键 词：双离心机 动态校准 三参数余弦算法 曲线拟合 

分 类 号：TB934[一般工业技术—计量学]