轴承
軸承
축승
BEARING
2014年
3期
45-48
,共4页
任学平%庞震%辛向志%邢义通
任學平%龐震%辛嚮誌%邢義通
임학평%방진%신향지%형의통
滚动轴承%故障诊断%小波包%峭度%包络解调
滾動軸承%故障診斷%小波包%峭度%包絡解調
곤동축승%고장진단%소파포%초도%포락해조
rolling bearing%fault diagnosis%wavelet packet%kurtosis%envelope demodulation
为实现轴承故障的精确诊断，提出一种基于小波包与峭度准则的包络解调方法。当信噪比较小时，该方法可以剔除含噪信号，与现阶段经常使用的细节系数能量方法相比，可更为有效地提取轴承的故障信息。该方法首先利用小波包将振动信号分解，突出小波包降噪效果的明显性；然后以峭度准则提取降噪后信号所需的细节系数并对其重构；最终进行包络谱分析，准确地检测出轴承故障，提高轴承故障诊断的精确度。
為實現軸承故障的精確診斷，提齣一種基于小波包與峭度準則的包絡解調方法。噹信譟比較小時，該方法可以剔除含譟信號，與現階段經常使用的細節繫數能量方法相比，可更為有效地提取軸承的故障信息。該方法首先利用小波包將振動信號分解，突齣小波包降譟效果的明顯性；然後以峭度準則提取降譟後信號所需的細節繫數併對其重構；最終進行包絡譜分析，準確地檢測齣軸承故障，提高軸承故障診斷的精確度。
위실현축승고장적정학진단，제출일충기우소파포여초도준칙적포락해조방법。당신조비교소시，해방법가이척제함조신호，여현계단경상사용적세절계수능량방법상비，가경위유효지제취축승적고장신식。해방법수선이용소파포장진동신호분해，돌출소파포강조효과적명현성；연후이초도준칙제취강조후신호소수적세절계수병대기중구；최종진행포락보분석，준학지검측출축승고장，제고축승고장진단적정학도。
In order to realize the precise fault diagnosis of bearings,an envelope demodulation method is proposed based on wavelet packet and kurtosis criterion.The method can eliminate noise signal when the signal noise ratio is small and more effectively extract fault information of bearings than the method is often used based on the details of sig-nal energy.Firstly the wavelet packet is used to decompose the vibration signal,and highlight the significance of wave-let packet de-noising effect.Then choosing detail coefficients of the de-noised signal with kurtosis criterion and re-construction.Finally the spectrum envelope analysis is carried out,the bearing fault is accurately detected,and the ac-curacy of bearing fault diagnosis is improved.
