Passive damping to enhance active positioning of a prototype lithography platen

Daniel J. Segalman; Robert J. Kipp; Danny L. Gregory

doi:10.1117/12.208904

5 May 1995 Passive damping to enhance active positioning of a prototype lithography platen

Daniel J. Segalman, Robert J. Kipp, Danny L. Gregory

Proceedings Volume 2445, Smart Structures and Materials 1995: Passive Damping; (1995) https://doi.org/10.1117/12.208904
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

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.

Citation Download Citation

Daniel J. Segalman, Robert J. Kipp, and Danny L. Gregory "Passive damping to enhance active positioning of a prototype lithography platen", Proc. SPIE 2445, Smart Structures and Materials 1995: Passive Damping, (5 May 1995); https://doi.org/10.1117/12.208904

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