Active Control of Vibrations in the Case of Asymmetrical High-Speed Rotors by Using Magnetic Bearings

[+] Author and Article Information
E. Anton

Fa. Knorr-Bremse GmbH München, Moosacher Strasse 80, D-8000 München 40, W. Germany

H. Ulbrich

Institute for Mechanics, Technical University Munich, Postfach 202420, D-8000 München 2, W. Germany

J. Vib., Acoust., Stress, and Reliab 107(4), 410-415 (Oct 01, 1985) (6 pages) doi:10.1115/1.3269281 History: Received June 11, 1985; Online November 23, 2009


Rotor-bearing systems with long, fast running rotors and rotational symmetry disturbed in stiffness, damping and moments of inertia are investigated. Since a magnetic bearing is used as an actuator in a control circuit, vibrations of the system can be influenced in a desired way, A feedback control is designed with emphasis to the endangered modes of oscillation of the rotor system caused by parametrical excitation. A small number of sensors and a controller with constant gain factors are used in order to obtain a low-cost system. For illustration an elastically supported gas centrifuge with 12 degrees of freedom and asymmetrical stiffness and damping properties is considered.

Copyright © 1985 by ASME
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