Research Article
Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform
Table 7
Comparison of envelope method with different wavelets.
| Wavelet | Maximum modulus | Average modulus | | Relative error/% | Average time/s |
| db2 | 0.1688 | 0.0101 | 16.6635 | 0.8553 | 0.2278 | 0.1322 | 13.0522 | 2.4698 | Sym2 | 0.1688 | 0.0101 | 16.6635 | 0.8553 | 0.2326 | 0.1322 | 13.0522 | 2.4698 | Coif1 | 0.1170 | 0.0098 | 11.9468 | 1.0310 | 0.2504 | 0.1282 | 13.0869 | 2.6637 | bior2.2 | 0.1105 | 0.0089 | 12.3620 | 1.0310 | 0.2688 | 0.1195 | 13.3673 | 2.6637 |
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