电子设计工程
電子設計工程
전자설계공정
Electronic Design Engineering
2015年
22期
11-13,17
,共4页
俞潇%莫家庆%吕小毅%贾振红
俞瀟%莫傢慶%呂小毅%賈振紅
유소%막가경%려소의%가진홍
瞬态信号%降采样%快速傅里叶变换%小波包频带能量谱%快速谱峭度
瞬態信號%降採樣%快速傅裏葉變換%小波包頻帶能量譜%快速譜峭度
순태신호%강채양%쾌속부리협변환%소파포빈대능량보%쾌속보초도
transient signal%down sampling%fast fourier transform%wavelet packet frequency band energy spectrum%fast spectral kurtosis
振动信号的谱分析是周界安全防范系统中一种重要的技术,其具有非平稳、瞬态等特点. 文章针对现场采集的敲击振动信号依次进行快速傅里叶变换、小波包频带能量谱、快速谱峭度分析. 由于信号采样频率过高,在进行快速傅里叶变换时不利于时频分析,因此在不失真的前提下提出信号降采样的预处理方式.最后,分别描述了这3种谱分析方法并在实际工程应用中对比3种谱分析的优劣性.
振動信號的譜分析是週界安全防範繫統中一種重要的技術,其具有非平穩、瞬態等特點. 文章針對現場採集的敲擊振動信號依次進行快速傅裏葉變換、小波包頻帶能量譜、快速譜峭度分析. 由于信號採樣頻率過高,在進行快速傅裏葉變換時不利于時頻分析,因此在不失真的前提下提齣信號降採樣的預處理方式.最後,分彆描述瞭這3種譜分析方法併在實際工程應用中對比3種譜分析的優劣性.
진동신호적보분석시주계안전방범계통중일충중요적기술,기구유비평은、순태등특점. 문장침대현장채집적고격진동신호의차진행쾌속부리협변환、소파포빈대능량보、쾌속보초도분석. 유우신호채양빈솔과고,재진행쾌속부리협변환시불리우시빈분석,인차재불실진적전제하제출신호강채양적예처리방식.최후,분별묘술료저3충보분석방법병재실제공정응용중대비3충보분석적우렬성.
Intelligent vibration perception perimeter security system in the acquisition of knock signal has the characteristics of non-stationary and transient. There are three kinds of knock signal, in turn, fast Fourier transform, wavelet packet frequency band energy spectrum, fast spectral kurtosis analysis. Due to the sampling frequency is too high, In the fast Fourier transform to the disadvantage of time-frequency analysis, so under the precondition of undistorted signal down sampling pretreatment methods are put forward. Finally, it describes the three methods of spectrum analysis and comparison the pros and cons of three kinds of spectral analysis in the practical engineering application.