一种新的内燃机振动信号时频分析方法  

A new method for time-frequency analysis of internal combustion engine vibration signals

作　　者：范宇 蔡艳平 陈万 郑勇 Fan Yu;Cai Yanping;Chen Wan;Zheng Yong(Room 305,Rocket Force University of Engineering,Xi’an 710025,China)

机构地区：[1]火箭军工程大学305室

出　　处：《武汉科技大学学报》2019年第5期382-386,共5页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(51405498)

摘　　要：本文针对现有时频分析方法在内燃机振动信号特征提取中存在的问题,提出利用经验小波变换(EWT)结合同步压缩变换(SST)对相关信号进行处理。仿真及实例验证结果表明,该方法不仅能够对内燃机振动信号时频特性进行有效表征,而且较传统时频分析方法具有更高的时频分辨率,对含噪信号表现出较强的鲁棒性。In view of the problem of the existing time-frequency analysis for vibration signal feature extraction,an improved method of integrating empirical wavelet transform(EWT)and synchrosqueezing transform(SST)was proposed to deal with relevant signals.Simulation and instance verification show that the proposed method not only can effectively characterize the time-frequency characteristics of internal combustion engine vibration signals but also has a higher time-frequency resolution than the traditional time-frequency analysis method,and it is robust when dealing with noisy signals.

关 键 词：内燃机 振动信号 经验小波变换 同步压缩变换 时频分析 

分 类 号：TH17[机械工程—机械制造及自动化] TN911.6[电子电信—通信与信息系统]