Passive shunt damping of a piezoelectric stack nanopositioner

Title: Passive shunt damping of a piezoelectric stack nanopositioner
Creator: Eielsen, Arnfinn Aas; Fleming, Andrew J.
Relation: 2010 American Control Conference (ACC 2010). Proceedings of the 2010 American Control Conference (Baltimore, MD 30 Jun - 2 Jul, 2010) p. 4963-4968
Relation: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5530938
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Resource Type: conference paper
Date: 2010
Description: The speed and accuracy of nanopositioning systems is heavily influenced by the presence of lightly damped mechanical resonances. In this work, an electrical impedance is connected in series with the driving piezoelectric stack actuator to damp the first mechanical resonance. The electrical shunt is shown to act equivalently to an output feedback controller except that no sensor is required. A simple inductor-resistor shunt circuit is demonstrated to damp the first mechanical resonance of a high-speed nanopositioner by 19.6 dB. The technique of shunt damping is low-cost, simple, guaranteed to be stable, and significantly improves the system response.
Subject: damping; electric impedance; nanopositioning; piezoelectric actuators
Identifier: http://hdl.handle.net/1959.13/933208
Identifier: uon:11570
Identifier: ISBN:9781424474264
Language: eng
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