Application of EMD and WVD to feature extraction from vibration signal of reciprocating pump valves

作者：Xu Chang Hang^*; Liu Ji Fei; Chen Guo Ming; Xie Jing

来源：Journal of China University of Petroleum(Edition of Natural Science), 2010, 34(3): 99-103.

DOI：10.3969/j.issn.1673-5005.2010.03.021

• Empirical mode decomposition
• Empirical mode decomposition(EMD)
• Pump valve
• Pump valves
• Wigner-Ville distribution

The combination of empirical mode decomposition(EMD) and Wigner-Ville distribution(WVD) was applied as a tool for feature extraction from vibration data of triplex pump valves. Firstly, vibration data are decomposed into several intrinsic mode functions(IMF) with EMD, then WVD is applied to each IMF. Through the obtained WVD, the features in time, frequency and amplitude domains of the original signal can be extracted. By combining all WVDs of IMFs, the WVD-based time-frequency distributions of the original vibration signal with an effective suppression of the cross-term interference were obtained. The experimental results show that the presented method can represent the valued characteristics of vibration data, which is of great importance for condition recognition and fault diagnosis of reciprocating pump valves.

• 出版日期2010
• 单位中国石油大学（华东）