Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults

Figure 3

Rn change with indefinite constant (A = 90 μm, B = 30 μm). (a) Rn(1). (b) Rn(2). (c) Rn(3). (d) Rn(4).

(a)

(b)

(c)

(d)