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.
出处
《机械设计与制造》
北大核心
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)
关键词
空压机
噪声
时频分析
短时傅立叶变换
Air compressor
Noise
Time frequency analysis
Short time fourier transform
