Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
559825 | Mechanical Systems and Signal Processing | 2009 | 9 Pages |
Abstract
The vibration signals always carry the abundant dynamic information of a machine and are very useful for the feature extraction and fault diagnosis. In practice, most subharmonic signals have a close relationship to time variables and can manifest large amplitude fluctuation, transient vibration, or modulation signals in time domain. In view of this, this paper describes an effective method to search the features of subharmonic faults of large rotating machinery based on empirical mode decomposition (EMD). Case study on some actual vibration signals of machine parts shows that EMD is an adaptive and unsupervised method in feature extraction and it provides an attractive alternative to the traditional diagnostic methods.
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
Fangji Wu, Liangsheng Qu,