冲击信号零漂修正的冲击响应谱互相关系数分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (16) : 219-225.

论文

李海广1,2 ，潘宏侠1，任海锋1

作者信息 +

Baseline Correction of Impact Signal Using the Cross-Correlation Coefficient of Shock Response Spectrum

Li Haiguang1,2，Pan Hongxia1，ＲenＨaifeng1

Author information +

文章历史 +

摘要

冲击振动信号通常因为冲击能量强、传感器特性等因素的影响，存在基线漂移现象，进而影响到后续的数据分析处理。针对这一问题，本文首先通过计算冲击信号的冲击响应谱，提出正负冲击响应谱互相关系数的定义，利用互相关系数开展检测基线漂移程度、检验修正效果等工作；其次，提出利用响应谱互相关系数为重构条件的自适应经验模式分解（EMD）漂移修正新方法，并与其他方法进行了比较。在对某机枪自动机动作过程中的冲击振动基线漂移信号分析和验证，数据结果表明，冲击响应谱互相关系数较传统的响应谱低频斜率等响应谱特征值，更能准确有效的表征基线漂移程度、以及修正效果的评判。

Abstract

The baseline shift components contained in the impact vibration signals being affected by factors associated with the sensor characteristic, influence on the following processing. This paper presents a new method for detecting shifted baseline level and validating the effect about correcting baseline shift. The proposed method is based on the cross-correlation coefficient between the positive shock response spectrum and the negative shock response spectrum. Moreover, this paper provides a new method for the baseline correction of impact vibration signal which represents the reconstruction of signal using the empirical mode decomposition (EMD) based on the cross-correlation coefficient. The validity and precision of the proposed method was demonstrated with analysis and validation of the signals generated in the operation process of an gun automation by contrasting results using the traditional method such as the shock response spectrum slope.

导出引用

李海广1,2,潘宏侠1，任海锋1. 冲击信号零漂修正的冲击响应谱互相关系数分析[J]. 振动与冲击, 2016, 35(16): 219-225

Li Haiguang1,2，Pan Hongxia1，ＲenＨaifeng1. Baseline Correction of Impact Signal Using the Cross-Correlation Coefficient of Shock Response Spectrum[J]. Journal of Vibration and Shock, 2016, 35(16): 219-225

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