Abstract：The basic theory of wavelet packet and the general principles of signal de-noising by using wavelet packet were introduced.By combining the vibration test data of pump unit in a pump station in the Eastern Line of South-to-North Water Transfer Project,a vibration signal de-nosing was analyzed.In the signal de-noising,the Db4 wavelet with SURE threshold strategy and the 3 decomposition level were chosen.After the coefficient compression and wavelet packets reconstruction,the de-noising signal was obtained.The result indicated that wavelet packet was useful to deal with de-noise signal,and after de-noising the signal was the same as the original signal.This will be good for the further fault analysis of pump unit.
郑源；佟晨光；须伦根；张海丽. 基于小波包分析的水泵机组振动信号去噪[J]. 排灌机械工程学报, 2008, 26(6): 55-57.
ZHENG Yuan, TONG Chen-guang, XU Lun-gen, ZHANG Hai-li. Vibration signal de-noising of pump unit based on wavelet packets transform. Journal of Drainage and Irrigation Machinery Engin, 2008, 26(6): 55-57.
[1] 陈作义,潘卫锋,梁金栋.大型泵站机组振动测试方法[J].排灌机械,2007,25(5):29-30[2] Singh B N,Tiwari A K.Optimal selection of wavelet basis function applied to ECG signal denoising[J].Digital Signal Processing,2006,16:275-287[3] Chang S G,Yu B,Vetterli M.Adaptive wavelet thresholding for image&noising and compression[J].IEEE Transactions on Image Processing,2000,9(9):1532-1546[4] 黄忠富,姜哲,赵斌娟.利用小波分析诊断水泵初始阶段的汽蚀故障[J].排灌机械,2005,23(2):4-7[5] 李忠国,张为公,匡军.基于动载的路面不平度识别的小波特征提取[J].江苏大学学报(自然科学版),2007,28(4):305-308[6] 吴勇,吴传牛,刘小舣.小波包分析在振动测试信号去噪中的应用[J].安徽师范大学学报(自然科学版),2007,30(1):28-30[7] 李伯全,王翔.小波包分析在变速箱故障自动诊断中的应用[J].江苏大学学报(自然科学版),2003,24(2):11-14[8] 秦岭,杨君.小波包分析在旋转机械故障诊断中的应用[J].电子工程师,2006,32(1):48-50[9] 飞思科技产品研发中心.小波分析理论与Matlab7实现[M].北京:电子工业出版社,2005:109-117[10] Yong Wu,Yuanjun He,Hongrning Cai.Optimal threshold selection algorithm in edge detection based on wavelet transform[J].Image and Vision Computing,2005,23:1159-1169[11] Shang L,Jaeger J,Krebs R.Efficiency analysis of data compression of power system transients using wavelet transform[A],2003:23-26
