Valve Fault Diagnosis of the Reciprocating Compressor&nbsp; Based on Hybrid Method

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (11) : 167-173.

Valve Fault Diagnosis of the Reciprocating Compressor Based on Hybrid Method

Zhang Siyang1、2, Xu Minqiang1, Li Yongbo1, Zhao Haiyang1, Wang Rixin1,

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Abstract

For the strong nonlinear and non-stationary characteristics of reciprocating compressor valve vibration signal, the cubic spline interpolation EEMD (S-EEMD) method which was well utilized still had the shortage of mode mixing and envelop inaccurate. According to the above mentioned state, the combined analysis method of EEMD based on quartic Hermite interpolation (QH-EEMD) with the power spectrum entropy (PSE) was proposed. The original signals were decomposed into a set of IMF components by quartic Hermite method which had the advantages of shape-preserving and tunable properties combined with EEMD promoting the signal stable in different decomposing scale, whose union ameliorated the approximation of interpolation curve and decreased the mode mixing. The advantages of QH-EEMD combined with PSE （QH-EEMD with PSE） analysis method was testified comparing with S-EEMD-PSE（S-EEMD with PSE） and QH-EEMD-SE(QH-EEMD with Sample Entropy) method. Taken common faults of reciprocating compressor as research objects, feature vectors of faults were extracted based on QH-EEMD-PSE method and the faults were diagnosed accurately.

Key words

EEMD / power spectrum entropy (PSE) / reciprocating compressor / fault diagnosis

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Zhang Siyang1、2, Xu Minqiang1, Li Yongbo1, Zhao Haiyang1, Wang Rixin1,. Valve Fault Diagnosis of the Reciprocating Compressor Based on Hybrid Method[J]. Journal of Vibration and Shock, 2016, 35(11): 167-173

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