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Enhancing vibration mitigation in a Jeffcott rotor with active magnetic bearings through parametric excitation

  • In previous studies of linear rotary systems with active magnetic bearings, parametric excitation was introduced as an open-loop control strategy. The parametric excitation was realized by a periodic, in-phase variation of the bearing stiffness. At the difference between two of the eigenfrequencies of the system, a stabilizing effect, called anti-resonance, was found numerically and validated in experiments. In this work, preliminary results of further exploration of the parametric excitation are shared. A Jeffcott rotor with two active magnetic bearings and a disk is investigated. Using Floquet theory, a deeper insight into the dynamic behavior of the system is obtained. Aiming at a further increase of stability, a phase difference between excitation terms is introduced.

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Author:Zacharias Kraus, Artem Karev, Peter Hagedorn, Fadi DohnalORCiD
Parent Title (English):Nonlinear Dynamics
Document Type:Article
Year of publication:2022
Release Date:2023/02/01
Tag:active magnetic bearings; parametric excitation; rotor dynamics
First Page:393
Last Page:400
Organisationseinheit:Forschung / Forschungszentrum Mikrotechnik
DDC classes:600 Technik, Medizin, angewandte Wissenschaften
Open Access?:ja
Peer review:wiss. Beitrag, peer-reviewed
Dohnal, Fadi
Licence (German):License LogoCreative Commons - CC BY - International - Attribution- Namensnennung 4.0