Research Article
Research on NOFRF Entropy-Based Detection Method for Early Damage of Pillar Porcelain Insulator
Table 7
Orthogonal test sets and visual analysis.
| | Number | A (location) | B (mm) | C (°) | D (error term) | NE |
| | 1 | 1 | 1 | 1 | 1 | 0.1379 | | 2 | 1 | 2 | 2 | 2 | 0.1629 | | 3 | 1 | 3 | 3 | 3 | 0.3089 | | 4 | 2 | 1 | 2 | 3 | 0.0948 | | 5 | 2 | 2 | 3 | 1 | 0.1275 | | 6 | 2 | 3 | 1 | 2 | 0.3864 | | 7 | 3 | 1 | 3 | 2 | 0.1141 | | 8 | 3 | 2 | 1 | 3 | 0.2227 | | 9 | 3 | 3 | 2 | 1 | 0.3350 | | k1 | 0.2032 | 0.1156 | 0.2490 | 0.2001 | | | k2 | 0.2029 | 0.1710 | 0.1976 | 0.2211 | | | k3 | 0.2239 | 0.3434 | 0.1835 | 0.2088 | | | Range | 0.0207 | 0.2279 | 0.0655 | 0.0210 | |
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