Research on NOFRF Entropy-Based Detection Method for Early Damage of Pillar Porcelain Insulator

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">Fe (1)</td><td class="align_center">Fe (2)</td><td class="align_center">Fe (3)</td><td class="align_center">Fe (4)</td><td class="align_center"><i>N</i><sub><i>E</i></sub></td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Healthy</td><td class="align_center">0.95251</td><td class="align_center">0.04695</td><td class="align_center">0.00055</td><td class="align_center">2.34<i>E</i> − 6</td><td class="align_center">0.21664</td></tr><tr><td class="align_left">Prefabricated crack</td><td class="align_center">0.90988</td><td class="align_center">0.08890</td><td class="align_center">0.00121</td><td class="align_center">5.10<i>E</i> − 06</td><td class="align_center">0.35388</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Damage detection index value of pillar porcelain insulator under hammer excitation.</div>

Shock and Vibration

tab3

Table 3

Table 3: Research on NOFRF Entropy-Based Detection Method for Early Damage of Pillar Porcelain Insulator 