Experimental Investigation of the Diagnosis of Angular Contact Ball Bearings Using Acoustic Emission Method and Empirical Mode Decomposition

Figure 12

Envelope spectrum of signals before denoising. (a) Small defect, small load, and 600 rpm. (b) Small defect, medium-low load, and 900 rpm. (c) Small defect, medium-high load, and 1500 rpm. (d) Large defect, small load, and 600 rpm. (e) Large defect, medium-high load, and 600 rpm. (f) Large defect, high load, and 1200 rpm.

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