Besides conventional fluid or ball bearings, active magnetic bearings are more and more used in industry. Their advantages are obvious as the principle for one degree of freedom shows:
The position of an object to be levitated is measured by a sensor. The sensor signal is conveyed to an analogue or digital controller, computing the necessary coil current to drive the electromagnet. Finally, this electromagnet generates magnetic forces which stabilises the rotor position.
Due to the contactless levitation this bearing principle can be utilised for a variaty of high tech and demanding applications. Nevertheless, research work is necessary to make this principle applicable for the challenging bearings task. In the following, my research at the Institute for Machine and Process Automation, Vienna University of Technology, Austria, focuses on control for active magnetic bearings.
Wurmsdobler, P.: Simulation eines nichtlinearen Modells für einen magnetgelagerten Mehrscheibenrotor. Diplomarbeit, Vienna University of Technology, 1992.
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Wurmsdobler, P., R. Siegwart and R. Herzog : Untersuchungen von Schwingungsdämpfungsmethoden bei magnetgelagerten Rotoren. MECOS Traxler AG, CH-8400 Winterthur, Switzerland, 1992.
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Wurmsdobler, P., H. Jörgl and H. Springer: State space adaptive control for a lumped mass rotor excited by nonconservative cross-coupling forces. In Childs, D., editor, Proceedings of The Eight Workshop on Rotordynamic Instability Problems in High-Performance Turbo-machinery, Texas A&M University, 1996.
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Wurmsdobler, P., H. Jörgl and H. Springer: State space adaptive control for a rigid rotor suspended in active magnetic bearings. In Matsumura, F., Y. Okada, M. Fujita and T. Namerikawa, editors, Proceedings to the Fifth International Symposium on Magnetic Bearings, pp185-190, 1996.
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Wurmsdobler, P.: State space adaptive control for a rigid rotor excited by nonconservative cross-coupling forces. In Kopacek, P. and A. Weinmann, editors, International Journal on Automation, Austria, 1997.
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Wurmsdobler, P.: State Space Adaptive Control for a Rigid Rotor Suspended in Active Magnetic Bearings. Dissertation, Vienna, University of Technology, 1997.
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