Research Article

Fault Diagnosis of Hydraulic Pumps Using PSO-VMD and Refined Composite Multiscale Fluctuation Dispersion Entropy

Figure 3

Comparison of RCMFDE, CMFDE, and MFDE. (a) Mean value and SD of WGN and l/f noise using different methods. (b)CV of WGN and l/f noise using different methods.
(a)
(b)