Simon_Andras_0

Simon_Andras_0 - ADAPTIVE DISTURBANCE REJECTION AND...

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Unformatted text preview: ADAPTIVE DISTURBANCE REJECTION AND STABILIZATION FOR ROTOR SYSTEMS WITH INTERNAL DAMPING Except where reference is made to the work of others, the work described in this dissertation is my own or was done in collaboration with my advisory committee. This dissertation does not include proprietary or classified information. Andr as Simon Certificate of Approval: David G. Beale Professor Mechanical Engineering George T. Flowers, Chair Professor Mechanical Engineering Dan B. Marghitu Professor Mechanical Engineering John Y. Hung Professor Electrical and Computer Engineering Mark J. Balas Professor Electrical and Computer Engineering University of Wyoming George T. Flowers Dean Graduate School ADAPTIVE DISTURBANCE REJECTION AND STABILIZATION FOR ROTOR SYSTEMS WITH INTERNAL DAMPING Andr as Simon A Dissertation Submitted to the Graduate Faculty of Auburn University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Auburn, Alabama May 9, 2009 ADAPTIVE DISTURBANCE REJECTION AND STABILIZATION FOR ROTOR SYSTEMS WITH INTERNAL DAMPING Andr as Simon Permission is granted to Auburn University to make copies of this dissertation at its discretion, upon the request of individuals or institutions and at their expense. The author reserves all publication rights. Signature of Author Date of Graduation iii Vita Andr as Simon, son of K aroly Simon and Eva Titz, was born on November 19, 1974 in Budapest, Hungary. He entered the Budapest University of Technology and Economics (formerly known as Technical University of Budapest) in September 1994 where he grad- uated with a Master of Science degree in Mechanical Engineering in 1999. After working as a Project Engineer at General Electric Lighting TUNGSRAM in Budapest, he joined the graduate program of Auburn University in 2000 to continue the research program on active magnetic bearings and rotordynamics. He received his Master of Science degree in Mechanical Engineering in 2003 and continued the research for the Ph.D. degree from early 2005. His research interests are nonlinear controls, mechatronics, rotordynamics and active magnetic bearings. iv Dissertation Abstract ADAPTIVE DISTURBANCE REJECTION AND STABILIZATION FOR ROTOR SYSTEMS WITH INTERNAL DAMPING Andr as Simon Doctor of Philosophy, May 9, 2009 (M.Sc., Auburn University, 2003) (M.Sc., Technical University of Budapest, 1999) 180 Typed Pages Directed by George T. Flowers Advanced rotor systems today consist of a lightweight rotor supported by radial active magnetic bearings (AMB). These systems are widely used in flywheel applications and in other fields where high rotational speeds are essential. Flywheels are most often made of composite materials to ensure low weight and sufficient structural strength. It has been shown in previous works that composite materials have high energy dissipation character- istics, mainly due to internal damping. In applications where the rotor speed is subcritical, this property is of low concern, whereas at supercritical speeds the effect of internal damp-...
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Simon_Andras_0 - ADAPTIVE DISTURBANCE REJECTION AND...

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