Intelligent Mechanical Fault Diagnosis Based on Multiwavelet Adaptive Threshold Denoising and MPSO

Table 5

Clustering centers obtained by WSPO.

Machinery Condition	Clustering Centers
	𝑃1	𝑃5	𝑃6
Normal	0.395	2.831	0.073
Outer-race defect	0.558	6.105	0.583
Inner-race defect	0.155	4.228	0.223
Roller element defect	0.796	5.045	0.021