电子学报2017，Vol.45Issue(1)：22-28,7.DOI:10.3969/j.issn.0372-2112.2017.01.004
振动信号趋势项提取方法研究
Research on Vibration Signal Trend Extraction
摘要
Abstract
A signal processing method based on empirical mode decomposition (EMD) is proposed,aiming at the serious interference problems that exist in the vibration displacement tests for the vehicle weapon.A new judgement criterion of determining the trend is presented for extracting the trend effectively.According to the symmetrical characteristics of the vibration signal relative to the time axis,the method determines whether the IMF component belongs to the trends by comparing the mean value between each order IMF component and the original signal.Effectiveness of the method is verified by the simulation vibration signal.The measured signals are processed by EMD,and the vibration displacement signal eventually is reconstructed.By comparing with wavelet transform method and a qualitative EMD trend determinant method,the results show that the trend extraction method based on EMD is effective and helpful to evaluate the performance of the weapon objectively.关键词
信号处理/振动位移/趋势项/经验模态分解/小波变换Key words
signal processing/vibration displacement/trend/EMD/wavelet transform分类
信息技术与安全科学引用本文复制引用
张军,潘泽鑫,郑玉新,李言..振动信号趋势项提取方法研究[J].电子学报,2017,45(1):22-28,7.
