Research on Rolling Bearing Fault Diagnosis Using Improved Majorization-Minimization-Based Total Variation and Empirical Wavelet Transform

Figure 8

Fault bearings, signal collected from test bench, and their purified signals using TV-MM: (a) (a1) the outer race failure of NUP311E, (a2) measured outer race failure vibration signal, and (a3) purified signal using TV-MM; (b) (b1) inner race failure of NJ311E, (b2) measured inner race failure vibration signal, and (b3) purified signal using TV-MM; (c) (c1) rolling element failure of NUP311E, (c2) measured rolling element failure vibration signal, and (c3) purified signal using TV-MM.

(a)

(b)

(c)