Active Hybrid Control Algorithm with Sky-Hook Damping and Lead-Lag Phase Compensation for Multi-DOFs Ultra-Low Frequency Active Vibration Isolation System

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">Passive</td><td class="align_center">Active (feedback only)</td><td class="align_center">Active (AHC)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Base (<i>μ</i>m/s)</td><td class="align_center">155</td><td class="align_center">155</td><td class="align_center">155</td></tr><tr><td class="align_left">Payload (<i>μ</i>m/s)</td><td class="align_center">49</td><td class="align_center">12</td><td class="align_center">8</td></tr><tr><td class="align_left">Average vibration attenuation rate (%)</td><td class="align_center">68.4</td><td class="align_center">92.3</td><td class="align_center">94.8</td></tr><tr><td class="align_left">Payload platform vibration residual rate (%)</td><td class="align_center">100</td><td class="align_center">24.5</td><td class="align_center">16.3</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

The time domain signal under different conditions.

Shock and Vibration

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Table 3

Table 3: Active Hybrid Control Algorithm with Sky-Hook Damping and Lead-Lag Phase Compensation for Multi-DOFs Ultra-Low Frequency Active Vibration Isolation System 

Table 3 | Active Hybrid Control Algorithm with Sky-Hook Damping and Lead-Lag Phase Compensation for Multi-DOFs Ultra-Low Frequency Active Vibration Isolation System 