Table 3 Comparison of methods on decomposition accuracy and efficiency
From: Cavitation Diagnostics Based on Self-Tuning VMD for Fluid Machinery with Low-SNR Conditions
Signal | Method | \({c}_{{u}_{1}{(x}_{1}+{x}_{2})}\)(%) | \({c}_{{u}_{2}{(c}_{1}+{c}_{2})}\)(%) | Time (s) |
|---|---|---|---|---|
f without noise | SVMD | 99.89 | 98.54 | 1166 |
SSA-VMD | 99.74 | 97.42 | 13123 | |
CEEMD | 92.96 | 93.74 | 3.4 | |
OVMD | 99.89 | 98.54 | 16580 | |
SK | 0.02 | 21.29 | 2.4 | |
f with noise SNR=0 dB | SVMD | 94.51 | 88.12 | 3326 |
SSA-VMD | 93.92 | 82.16 | 15682 | |
CEEMD | 62.82 | 63. 1 | 3.2 | |
OVMD | 94.51 | 88.59 | 15965 | |
SK | 0 | 18.05 | 2.9 | |
f with noise SNR=−5 dB | SVMD | 84 | 79.9 | 4582 |
SSA-VMD | 82.41 | 65.47 | 25246 | |
CEEMD | 48.93 | 42.31 | 4.1 | |
OVMD | 84.06 | 81.07 | 21584 | |
SK | 0 | 12.3 | 3.4 | |
f with noise SNR=−10 dB | SVMD | 63.14 | 72.02 | 5020 |
SSA-VMD | 57.76 | 45.84 | 30036 | |
CEEMD | 29.52 | 27.19 | 5.5 | |
OVMD | 63.15 | 72.03 | 24364 | |
SK | 60.95 | 0 | 3.6 |