飞机设计
飛機設計
비궤설계
AIRCRAFT DESIGN
2011年
3期
37-43
,共7页
转子%滚动轴承%故障诊断%Hilbert-Huang变换%盲源分离
轉子%滾動軸承%故障診斷%Hilbert-Huang變換%盲源分離
전자%곤동축승%고장진단%Hilbert-Huang변환%맹원분리
rotor%rolling element bearing%fault diagnosis%Hilbert-Huang transform（HHT）%blind source separation
结合Hilbert-Huang变换和盲源分离的优点,提出一种基于Hilbert-Huang变换和盲源分离的滚动轴承耦合故障诊断方法。该方法首先对滚动轴承故障信号进行EMD分解（经验模态分解）,得出各个本征模态函数IMF,并对IMF进行包络解调,然后用盲源分离方法对所得到的解调信号进行盲源分离,最后对盲分离后的信号进行频谱变换,从频谱图上可以清晰地观察出滚动轴承的故障特征频率。本文建立了转子-滚动轴承故障实验台,模拟了滚动轴承耦合故障,应用本文方法进行了实例分析,结果充分表明了本文方法较单一Hilber-Huang变换具有更好的降噪能力,更加突出了滚动轴承故障特征。
結閤Hilbert-Huang變換和盲源分離的優點,提齣一種基于Hilbert-Huang變換和盲源分離的滾動軸承耦閤故障診斷方法。該方法首先對滾動軸承故障信號進行EMD分解（經驗模態分解）,得齣各箇本徵模態函數IMF,併對IMF進行包絡解調,然後用盲源分離方法對所得到的解調信號進行盲源分離,最後對盲分離後的信號進行頻譜變換,從頻譜圖上可以清晰地觀察齣滾動軸承的故障特徵頻率。本文建立瞭轉子-滾動軸承故障實驗檯,模擬瞭滾動軸承耦閤故障,應用本文方法進行瞭實例分析,結果充分錶明瞭本文方法較單一Hilber-Huang變換具有更好的降譟能力,更加突齣瞭滾動軸承故障特徵。
결합Hilbert-Huang변환화맹원분리적우점,제출일충기우Hilbert-Huang변환화맹원분리적곤동축승우합고장진단방법。해방법수선대곤동축승고장신호진행EMD분해（경험모태분해）,득출각개본정모태함수IMF,병대IMF진행포락해조,연후용맹원분리방법대소득도적해조신호진행맹원분리,최후대맹분리후적신호진행빈보변환,종빈보도상가이청석지관찰출곤동축승적고장특정빈솔。본문건립료전자-곤동축승고장실험태,모의료곤동축승우합고장,응용본문방법진행료실례분석,결과충분표명료본문방법교단일Hilber-Huang변환구유경호적강조능력,경가돌출료곤동축승고장특정。
Combining the advantages of Hilbert-Huang transform and blind source separation,a comprehensive analysis method of ball bearing coupling faults features extraction is proposed.Firstly,EMD（Empirical Mode Decomposition） is used to decompose the rolling element bearing fault signal.And each intrinsic mode function（IMF） is obtained which is demodulated by Hilbert transform.Secondly,the blind source separation is used to achieve the separation of ball bearing fault signal.Thirdly,spectrum analysis is carried out to each separation signal.The feature frequencies of rolling element bearing faults can be clearly observed.Finally,a rotor-balling bearing experimental rig is established to simulate the bearing coupling fault,the examples are used to verify the new methods proposed in this paper,and the result shows that the new method has stronger de-noising ability,and is can extract fault features of bearing coupling faults better.
