Modal Tilt/Translate Control and Stability of a Rigid Rotor with Gyroscopics on Active Magnetic Bearings

<table>Log Decrement as a Function of Dimensionless Running Speed, <svg height="19.362499" id="M124" style="vertical-align:-4.39394pt" version="1.1" viewbox="0 0 70.5625 19.362499" width="70.5625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.625,13.275)"><use xlink:href="#x1D701"></use></g>
<g transform="matrix(.012,-0,0,-.012,8.325,17.35)"><use xlink:href="#x1D45F"></use></g><g transform="matrix(.012,-0,0,-.012,13.346,17.35)"><use xlink:href="#x2C"></use></g><g transform="matrix(.012,-0,0,-.012,16.059,17.35)"><use xlink:href="#x30"></use></g>
<g transform="matrix(.017,-0,0,-.017,31.075,13.275)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,49.74,13.275)"><use xlink:href="#x30"></use></g><g transform="matrix(.017,-0,0,-.017,57.899,13.275)"><use xlink:href="#x2E"></use></g><g transform="matrix(.017,-0,0,-.017,61.775,13.275)"><path d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z" id="x31"></path></g>
</svg>.</table>

International Journal of Rotating Machinery

fig6

Figure 6

Figure 6: Modal Tilt/Translate Control and Stability of a Rigid Rotor with Gyroscopics on Active Magnetic Bearings 