A Novel Method for Identifying Resonance Frequency Band in Weak Bearing Fault Diagnosis of Electric Driving System

Figure 13

SES of FK, HTMFK, Protrugram, and SVD under 2000 rpm and 50 N·m. (a) FK. (b) HTMFK. (c) Protrugram. (d) SVD.

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(b)

(c)

(d)