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Open AccessArticle

Design and Analysis of a 1D Actively Stabilized System with Viscoelastic Damping Support

1
Linz Center of Mechatronics GmbH, Altenbergerstr. 69, 4040 Linz, Austria
2
Department of Electrical Drives and Power Electronics, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria
*
Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in Passenbrunner, J.; Jungmayr, G.; Amrhein W. Design of a Passively Magnetically Stabilized System with Viscoelastic Damping Support and Flexible Elements. In Proceedings of the 16th International Symposium on Magnetic Bearings (ISMB16), Beijing, China, 13–17 August 2018.
Actuators 2019, 8(2), 33; https://doi.org/10.3390/act8020033
Received: 5 March 2019 / Revised: 26 March 2019 / Accepted: 15 April 2019 / Published: 17 April 2019
Passively magnetically stabilized degrees of freedom yield the benefit of reduced complexity and therefore costs. However, the application of passive magnetic bearings (PMBs) also features some drawbacks. The poor damping capability leads to exaggerated deflection amplitudes when passing the resonance speeds of the applied system. This results in the necessity of external damping. Complying with the goal of costs and complexity, viscoelastic materials offer a suitable solution. However, these materials show high frequency and temperature dependent properties which induce the necessity of a proper model. Thus, the design of systems, as presented in this paper, requires accurate modeling of the dynamic behavior including the nonlinear characteristic of damping elements to predict the system displacements. In the investigated setup only two degrees of freedom remain to be controlled actively. These are the axial rotation and the axial position of the rotor which are controlled by the motor and an active magnetic axial bearing (AMB). This article focuses on the rotor dynamic modeling of a radial passively magnetically stabilized system especially considering the nonlinear behavior of viscoelastic damping elements. Finally, the results from the analytic model are verified by measurements on a manufactures test system. View Full-Text
Keywords: passive magnetic bearing; viscoelastic material; damping; modeling; rotor dynamics; active magnetic bearing; cost reduction passive magnetic bearing; viscoelastic material; damping; modeling; rotor dynamics; active magnetic bearing; cost reduction
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Passenbrunner, J.; Jungmayr, G.; Amrhein, W. Design and Analysis of a 1D Actively Stabilized System with Viscoelastic Damping Support. Actuators 2019, 8, 33.

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