一種旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提取的新方法.pdf 全文
本文關(guān)鍵詞:一種旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提取的新方法,由筆耕文化傳播整理發(fā)布。
一種旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提取的新方法 ? ??廖慶斌 李舜酩
一種旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提取的新方法
廖慶斌 李舜酩
南京航空航天大學(xué) ,南京 ,210016
摘要 :針對(duì)在信號(hào)特征提取中的噪聲抑制問(wèn)題 ,提出了一種新的旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提
取方法 ,即時(shí)序多相關(guān) - 經(jīng)驗(yàn)?zāi)J椒纸夥椒。通過(guò)對(duì)原始數(shù)據(jù)進(jìn)行時(shí)間序列多相關(guān)處理 ,消除
了采樣序列中零均值噪聲信號(hào)的影響 ,克服了在后繼頻譜分析中由于噪聲而導(dǎo)致頻譜難于辨
識(shí)的問(wèn)題 ,凸顯了原始信號(hào)中的特征信號(hào)成分。時(shí)序多相關(guān)分析為后繼的譜分析提供了便于
處理的前處理數(shù)據(jù)。應(yīng)用經(jīng)驗(yàn)?zāi)J椒纸?,能較充分地表現(xiàn)出所需提取的特征信號(hào)。仿真和實(shí)
際某型發(fā)動(dòng)機(jī)轉(zhuǎn)軸振動(dòng)信號(hào)特征提取中的分析表明 ,新方法能成功提取到旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)
包含的各個(gè)特征信號(hào) ,證明該方法在旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提取中具有很好的工程應(yīng)用
前景。
關(guān)鍵詞 :時(shí)間序列 ;多相關(guān) ;經(jīng)驗(yàn)?zāi)J椒纸?;旋轉(zhuǎn)機(jī)械 ;特征提取
中圖分類號(hào) : T H165 ; TN911 文章編號(hào) :1004 ? 132X 2006 16 ? 1675 ? 05
A Novel Method for Feature Extraction of Rotating Machinery Vibration Signals
Liao Qingbin Li Shunming
Nanjing U niversity of Aeronautics and Astronautics ,Nanjing ,210016
Abstract :A novel method named multi - correlation of time series and empirical mode decomposi2
tion for suppressing the noise in t he feature extraction was developed. It eliminates t he effect of zero -
average noise in sampling series , get over t he difficulty of f requency identification because of strong
background noise in the subsequence analysis , protrudes t he feature component s of original signals ,
and provides a wonderf ul former data for spectrum analysis using the multi - correlation of time se2
ries. It can sufficiently p ut up the needed feat ure signals making use of empirical mode decomposition.
The
本文關(guān)鍵詞:一種旋轉(zhuǎn)機(jī)械振動(dòng)信號(hào)特征提取的新方法,由筆耕文化傳播整理發(fā)布。
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