Compensation of Time-Varying Harmonic Disturbances on Nonlinear Bearingless Slice Motors
| Authors: | Hüttner Christian, University of Stuttgart, Germany
Rieber Jochen M., University of Stuttgart, Germany
Allgower Frank, University of Stuttgart, Germany
Hugel Jörg, ETH Zurich, Switzerland |
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| Topic: | 8.2 Modelling & Control of Biomedical Systems |
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| Session: | Biomedical Engineering / Biomedical Signal Processing I |
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| Keywords: | Magnetic bearings, vibration suppression, nonlinear systems, exact input-output linearization, output regulation |
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Abstract
The rotor position of magnetic bearings or bearingless slice motors is usually subject to several harmonic disturbances with time-varying frequencies. To achieve low power consumption and good vibration suppression, efficient control algorithms have to be invoked.In this contribution, exact input-output linearization is applied to a nonlinear bearing model, followed by output regulation via the internal model principle. The resulting disturbance rejection approach does not need to know the disturbance amplitude and phase, and changesits behavior according to the measured disturbance frequency. The method is tested in simulations related to a prototype magnetic bearing.
