测试技术学报2018，Vol.32Issue(3)：243-249,7.DOI:10.3969/j.issn.1671-7449.2018.03.010
基于EMD算法的激波管系统误差识别与消除方法
The Method of Distinguishing and Eliminating the System Error of Shock Tube Based on EMD Algorithm
马泽 1张志杰2
作者信息
- 1. 中北大学 仪器与电子学院,山西 太原 030051
- 2. 中北大学 仪器科学与动态测试教育部重点实验室,山西 太原 030051
- 折叠
摘要
Abstract
To solve the problem that the system error of shock tube has influence on dynamic calibra-tion of pressure sensor,causing the result inaccurate,Empirical Mode Decomposition (EMD)method is used to decompose the pressure sensor data of dynamic calibration with shock tube.The frequency spec-trums of different components are analyzed and the reconstruction signal model is set up to get rid of the system error.The corresponding Intrinsic Mode Functions (IMFs)of the decomposition results from a number of different sensors are analyzed,the correlation coefficients are calculated,and the relationship between the correlation coefficients and the matching factors of the IMFs in the reconstruction model is established.The reconstruction signal of the step response of pressure sensor is got by distinguishing and eliminating the system error of shock tube.Compared with the original signal,the results show that the natural frequency,rising time and platform duration time of the sensor are more accurate.The method of distinguishing and eliminating the system error of shock tube based on the EMD decomposi-tion is useful and effective.关键词
EMD/激波管/系统误差/动态特性Key words
EMD/shock tube/system error/dynamic characteristics分类
信息技术与安全科学引用本文复制引用
马泽,张志杰..基于EMD算法的激波管系统误差识别与消除方法[J].测试技术学报,2018,32(3):243-249,7.
