Ball Screw Fault Detection and Location Based on Outlier and Instantaneous Rotational Frequency Estimation

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2"> </td><td class="align_center" rowspan="2">Real</td><td class="align_center" colspan="5">Estimation of different <i>N</i></td></tr><tr class="thead"><td class="align_center">1.1</td><td class="align_center">1.2</td><td class="align_center">1.5</td><td class="align_center">1.8</td><td class="align_center">2.0</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Time (s)</td><td class="align_center">25</td><td class="align_center">22.7</td><td class="align_center">25.8</td><td class="align_center">25.5</td><td class="align_center">25.1</td><td class="align_center">24.8</td></tr><tr><td class="align_left">Error rate (%)</td><td class="align_left"> </td><td class="align_center">9.2</td><td class="align_center">3.2</td><td class="align_center">2.0</td><td class="align_center">0.4</td><td class="align_center">0.8</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Fault time estimation results.</div>

Shock and Vibration

tab2

Table 2

Table 2: Ball Screw Fault Detection and Location Based on Outlier and Instantaneous Rotational Frequency Estimation 