Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/45046

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Title
Model-based vibration suppression in piezoelectric tube scanners through induced voltage feedback
Author/Creator
Maess, Johannes;  Fleming, Andrew J.;  Allgower, Frank
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science
Description
The operation speed and tracking accuracy of piezoelectric tube actuators in scanning probe microscopy is significantly reduced due to the excitation of the scanner eigenfrequencies by the driving voltages. Feedback control is a suitable method for vibration suppression but suffers from the required additional sensor equipment and high cost for generation of a displacement feedback signal. Operating the piezotube in single-electrode excitation mode allows the comparatively uncomplex measurement of the induced voltages at sensor electrodes. The Finite Element (FE) approach enables an accurate modeling of the voltage signals. Furthermore, geometrical details included in the dynamic FE-model are the sample mass attached to the top of the tube as well as tube eccentricity and dislocated electrodes. Additionally, the FE- model accounts for dynamics-coupling effects along the separate axes of the three-dimensional tube motion. Comparison with experimental data demonstrates the accuracy of the FE-model. The controller employing the induced voltage as a feedback signal is designed by means of a reduced order model obtained from modal truncation. The efficacy of the controller is illustrated by closed-loop simulations.
Relation
American Control Conference 2008. Proceedings of the American Control Conference 2008 (Seattle, WA 11-13 June, 2008) p. 2022-2027
Publisher Link
http://dx.doi.org/10.1109/ACC.2008.4586790
Date
2008
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Keyword(s)
control system synthesis;  feedback;  finite element analysis;  physical instrumentation control;  piezoelectric actuators;  reduced order systems;  scanning probe microscopy;  vibration isolation
Resource Type
conference paper
Identifier
http://hdl.handle.net/1959.13/45046
Identifier
ISBN:9781424420780
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Subject
"Model-based vibration suppression in piezoelectric tube scanners through induced voltage feedback"
 
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