空压机噪声信号的时频分析  

Time-frequency analysis of air compressor noise signal

作　　者：高志彬[1,2] 仪垂杰[2] 

机构地区：[1]上海理工大学动力工程学院,上海200093 [2]青岛理工大学能源与环境装备技术中心,青岛266033

出　　处：《机械设计与制造》2009年第10期227-228,共2页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(60772149)

摘　　要：为了提取空压机噪声信号中的周期成分,采用短时傅立叶变换在Matlab环境下分析了空压机噪声信号,提取了噪声信号中的主要周期分量。分析结果表明:利用短时傅立叶变换可以准确提取空压机噪声信号中的周期分量。时频分析方法是提取噪声信号中周期分量的有效方法。In order to extract periodic components from air compressor noise signal,time-frequency analysis of air compressor noise signal has been carried out. In Matlab environment short time Fourier transform was used to analysis air compressor noise signal. Periodic components of air compressor noise signal were extracted. Results show ：periodic components of air compressor noise signal can be extracted by short time Fourier transform exactly. Time-frequency analysis is effective method for extracting periodic components from noise signal.

关 键 词：空压机 噪声 时频分析 短时傅立叶变换 

分 类 号：TH12[机械工程—机械设计及理论] TB524[理学—物理]