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.
| Author: | Zacharias Kraus, Artem Karev, Peter Hagedorn, Fadi DohnalORCiD |
|---|---|
| DOI: | https://doi.org/10.1007/s11071-022-07572-7 |
| ISSN: | 1573-269X |
| ISSN: | 0924-090X |
| Parent Title (English): | Nonlinear Dynamics |
| Document Type: | Article |
| Language: | English |
| Year of publication: | 2022 |
| Release Date: | 2023/02/01 |
| Tag: | active magnetic bearings; parametric excitation; rotor dynamics |
| Volume: | 109 |
| 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): |  Creative Commons - CC BY - International - Attribution- Namensnennung 4.0 |
