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Proceedings Paper

Passive damping to enhance active positioning of a prototype lithography platen
Author(s): Daniel J. Segalman; Robert J. Kipp; Danny L. Gregory
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Paper Abstract

A viscoelastic tuned-mass damper was used to suppress specific structural modes of a prototype lithography platen. The platen is magnetically levitated and it is repositioned and held in position by a closed-loop feedback control system. Important capabilities of the platen control system are precise positioning and rapid repositioning, which tend to require high frequency bandwidth. The high bandwidth excites structural vibration modes which are disruptive to the control system. The present work was to develop and demonstrate a means to suppress these modes using passive vibration damping techniques. The motivation is to increase the robustness of the platen positioning and control system by reducing unwanted modal accelerations excited by high control system bandwidth. Activities performed and discussed in this paper include the analytical design of viscoelastic tuned-mass dampers and the demonstration/testing of their effectiveness on the platen while levitated and controlled.

Paper Details

Date Published: 5 May 1995
PDF: 9 pages
Proc. SPIE 2445, Smart Structures and Materials 1995: Passive Damping, (5 May 1995); doi: 10.1117/12.208904
Show Author Affiliations
Daniel J. Segalman, Sandia National Labs. (United States)
Robert J. Kipp, Sandia National Labs. (United States)
Danny L. Gregory, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 2445:
Smart Structures and Materials 1995: Passive Damping
Conor D. Johnson, Editor(s)

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