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Fault Diagnosis Technology of Plunger Pump based on EMMD-Teager

Volume 15, Number 7, July 2019, pp. 19121919
DOI: 10.23940/ijpe.19.07.p18.19121919

Shijie Deng, Liwei Tang, Xujun Su, and Jinli Che

Department of Artillery Engineering, Army Engineering University, Shijiazhuang, 050003, China


(Submitted on March 27, 2019; Revised on April 26, 2019; Accepted on June 23, 2019)


Based on the analysis of common failure modes of plunger pumps, a fault diagnosis method based on EMMD decomposition and Teager energy operator demodulation is proposed to solve the problem of weak characteristic signals in early failure of plunger pumps. Firstly, the extremum field mean mode decomposition (EMMD) is used to obtain the finite mode component IMF and the residual C. Then, the IMF component is demodulated by Teager energy operator, and the characteristic peak appears in the spectrum. The energy information of the feature frequency points is extracted to form the feature vectors, which can be used as the proportion. The elements in the vectors are screened by the classification sensitivity, and the effective feature vectors are finally obtained. The experimental results show that the EMMD-Teager method can filter the signal effectively and extract features from the frequency domain conveniently. The selected feature vectors can accurately classify the three states of the normal plunger pump, plunger hole wear, and slipper wear.


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