Running Characteristics of Aerodynamic Bearing with Self-Lifting Capability at Low Rotational Speed

<table>FFT responses [<i>μ</i>m] of rotor orbits <svg height="11.1" id="M72" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 82.237503 11.1" width="82.237503" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,11.1)">
<g transform="translate(72,-63.12)">
<text transform="matrix(1,0,0,-1,-71.95,63.35)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝜔</tspan>
<tspan style="font-size: 12.50px; " x="11.977874" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="24.018263" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="30.269764" y="0">5</tspan>
<tspan style="font-size: 12.50px; " x="36.521263" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="42.772762" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="51.112263" y="0">H</tspan>
<tspan style="font-size: 12.50px; " x="60.139431" y="0">z</tspan>
</text>
</g>
</g>
</svg>, zero load:  (a) <svg height="14.075" id="M73" style="vertical-align:-2.72116pt" version="1.1" viewbox="0 0 82.762497 14.075" width="82.762497" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.075)">
<g transform="translate(72,-60.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">Ω</tspan>
<tspan style="font-size: 12.50px; " x="12.765563" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="24.805952" y="0">3</tspan>
<tspan style="font-size: 12.50px; " x="31.057451" y="0">2</tspan>
<tspan style="font-size: 12.50px; " x="37.308952" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="45.648453" y="0">r</tspan>
<tspan style="font-size: 12.50px; " x="50.124527" y="0">p</tspan>
<tspan style="font-size: 12.50px; " x="56.376026" y="0">m</tspan>
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</g>
</svg>, (b) <svg height="14.2" id="M74" style="vertical-align:-2.72116pt" version="1.1" viewbox="0 0 82.762497 14.2" width="82.762497" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.2)">
<g transform="translate(72,-60.64)">
<text transform="matrix(1,0,0,-1,-71.95,63.4)">
<tspan style="font-size: 12.50px; " x="0" y="0">Ω</tspan>
<tspan style="font-size: 12.50px; " x="12.765563" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="24.805952" y="0">6</tspan>
<tspan style="font-size: 12.50px; " x="31.057451" y="0">3</tspan>
<tspan style="font-size: 12.50px; " x="37.308952" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="45.648453" y="0">r</tspan>
<tspan style="font-size: 12.50px; " x="50.124527" y="0">p</tspan>
<tspan style="font-size: 12.50px; " x="56.376026" y="0">m</tspan>
</text>
</g>
</g>
</svg>, and (c) <svg height="14.075" id="M75" style="vertical-align:-2.72116pt" version="1.1" viewbox="0 0 90.574997 14.075" width="90.574997" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.075)">
<g transform="translate(72,-60.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">Ω</tspan>
<tspan style="font-size: 12.50px; " x="12.765563" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="24.805952" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="31.057451" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="37.308952" y="0">2</tspan>
<tspan style="font-size: 12.50px; " x="43.560452" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="51.899952" y="0">r</tspan>
<tspan style="font-size: 12.50px; " x="56.376026" y="0">p</tspan>
<tspan style="font-size: 12.50px; " x="62.627525" y="0">m</tspan>
</text>
</g>
</g>
</svg>.</table>

Advances in Tribology

fig8

Figure 8

Figure 8: Running Characteristics of Aerodynamic Bearing with Self-Lifting Capability at Low Rotational Speed 