| Author Name | Affiliation | | WANG Lei | Institute of Vibration Engineering,Department of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China, | | ZHAO Jun-long | Institute of Vibration Engineering,Department of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China, | | WANG Feng-tao | Institute of Vibration Engineering,Department of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China, | | MA Xiao-jiang | Institute of Vibration Engineering,Department of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China, |
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| Abstract: |
| Since there always exist interference components which caused by valve vibration,it is hard to directly use cylinder signal for fault diagnosis of reciprocating compressor. Based on Empirical Mode Decomposition (EMD) coherence,a new method for the fault diagnosis of reciprocating compressor cylinder is presented. Firstly,double channel signals of cylinder and valve are synchronously sampled. Secondly,cyclic cross-correlation function is used to eliminate the time delay between these signals. Finally,EMD coherence method is utilized to remove the interference components from cylinder signal. Thus,more concise and precise working condition information for cylinder and inner components can be obtained. So it is an effective method for fault diagnosis of reciprocating compressor cylinder. |
| Key words: reciprocating compressor cylinder EMD coherence time delay estimation |
| DOI：10.11916/j.issn.1005-9113.2012.01.020 |
| Clc Number:TH45 |
| Fund: |
