Research Article
Experimental Investigation of the Diagnosis of Angular Contact Ball Bearings Using Acoustic Emission Method and Empirical Mode Decomposition
Figure 15
Envelope spectrum of signals before denoising. (a) Small defect, medium-high load, and 1500 rpm. (b) Small defect, high load, and 600 rpm. (c) Large defect, small load, and 1500 rpm. (d) Large defect, medium-low load, and 1200 rpm. (e) Large defect, high load, and 600 rpm.
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