电子制作
電子製作
전자제작
ELECTRONICS DIY
2013年
12期
33-33
,共1页
滚动轴承%小波包变换%阈值%消噪
滾動軸承%小波包變換%閾值%消譟
곤동축승%소파포변환%역치%소조
rol ing bearing%Wavelet packet transform%Threshold value%de-noising
小波包变换是一种时频分析的方法，在分析中高频方面优于小波变换，将其应用于滚动轴承振动信号中噪声的消除。本文在经典的小波软、硬阈值消噪方法的基础上，提出了一种基于小波包分析的改进方法。Matlab仿真结果表明，此法同时克服了软、硬阈值方法的缺点，而且其消噪效果比小波消噪方法要好。
小波包變換是一種時頻分析的方法，在分析中高頻方麵優于小波變換，將其應用于滾動軸承振動信號中譟聲的消除。本文在經典的小波軟、硬閾值消譟方法的基礎上，提齣瞭一種基于小波包分析的改進方法。Matlab倣真結果錶明，此法同時剋服瞭軟、硬閾值方法的缺點，而且其消譟效果比小波消譟方法要好。
소파포변환시일충시빈분석적방법，재분석중고빈방면우우소파변환，장기응용우곤동축승진동신호중조성적소제。본문재경전적소파연、경역치소조방법적기출상，제출료일충기우소파포분석적개진방법。Matlab방진결과표명，차법동시극복료연、경역치방법적결점，이차기소조효과비소파소조방법요호。
the wavelet packet transform is a time-frequency analysis method, based on the analysis of the high frequency part is better than the wavelet transform, applied to the rol ing bearing noise elimination of vibration signal. Based on the classic soft and hard threshold wavelet denoising methods, on the basis of proposed an improved method based on wavelet packet analysis. Matlab simulation results show that this method at the same time overcome the shortcomings of soft and hard threshold method, and its de-noising effect is better than wavelet de-noising method.
