水力发电学报2012，Vol.31Issue(2)：240-244,250,6.
基于集合经验模态分解与Wigner-Ville分布的水轮机振动特征信号的分析研究
Analysis of hydro turbine vibration signals based on empirical mode decomposition and Wigner-Ville distribution
摘要
Abstract
To avoid the defect of empirical mode decomposition（EMD） in mode mixing and the inherent defect of Wigner-Ville distribution（WVD） in cross-term interference of multi-component non-stationary signals,this paper proposes a method of combining ensemble empirical mode decomposition（EEMD） and WVD.Due to its WVD features,this method can better describe the time variation of signals.The simulation results of hydro turbine vibration signals show that the proposed method can effectively suppress the cross-term interference and thus provides an effective analysis tool for fault diagnosis of hydro turbine.关键词
水轮机/时频分析/EEMD/Wigner-Ville分布/振动信号Key words
hydro turbine/time-frequency analysis/EEMD/Wigner-Ville distribution/vibration signal分类
建筑与水利引用本文复制引用
苏立,南海鹏,余向阳,吴罗长,王瑾..基于集合经验模态分解与Wigner-Ville分布的水轮机振动特征信号的分析研究[J].水力发电学报,2012,31(2):240-244,250,6.基金项目
国际科技合作与交流计划项目 （）
