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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Precision Engineerin...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Precision Engineering
Article . 2009 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Automatic object release in magnetic and electrostatic levitation systems

Authors: Ewoud van West; Akio Yamamoto; Toshiro Higuchi;

Automatic object release in magnetic and electrostatic levitation systems

Abstract

A method is described for automatic release of a levitated object without external control commands in levitation systems (such as magnetic and electrostatic levitation). The key aspect is an integral action in the controller. Examples of a zero-power controller for magnetic levitation and a proportional-integral-derivative (PID) controller for electrostatic levitation are presented. Automatic release of the levitated object is a consequence of the controller behavior when the levitated object has a temporary forced position error. In a pick and place task that uses non-contact levitation techniques, a position error is induced at placing. Automatic release simplifies the task of placing, as no external command is required. The principle of this release method is explained and analyzed using a zero-power controller in a magnetic levitation system. For electrostatic levitation, which is analogous to magnetic levitation, experimental results of an automatic release based on PID-control are presented. A general guideline is derived to tune the controller settings so as to achieve automatic release, and this is supported by experiments.

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    15
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
15
Average
Top 10%
Top 10%
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