（浙江师范大学精密机械研究所，浙江 金华 321004）
中图分类号：HT165.3；TP277；TN911.2；TP301.6 文献标志码：A 文章编号：1674-5124（2013）03-0001-05
Closely wavelet common ridge extraction method based on phase extraction
JIANG Yong-hua， MO Xiao-qiang， YOU Jia-yi， SHEN Meng-jie， SHEN Feng-liang
（Institute of Precision Machinery，Zhejiang Normal University，Jinhua 321004，China）
Abstract: In order to improve the precision of closely wavelet ridge extracted by conventional method， a new method for extracting closely wavelet common ridge based on phase extraction is proposed. The common-ridge phase characteristics of close single frequency signals and frequency modulated signals are fully analyzed， then a common ridge extraction method is put forward based on phase extraction， and finally the problems in signal reconstruction is solved. The proposed method is simple， accurate and with rapid convergence. The results of simulation example show that the proposed method is feasible and effective. Finally， the result of gearbox analysis shows that this method can extract fault characteristics of gearbox effectively.
Key words: wavelet ridge； phase method； closely ridge； wavelet transform