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Proceedings Paper

Vibration Suppression For Precision Segmented Reflector Backup Structure
Author(s): G-S. Chen; J. A. Garba; B. K. Wada
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Paper Abstract

This paper describes an ongoing effort at the Jet Propulsion Laboratory on the vibration suppression for the Precision Segmented Reflector backup structure. The effort is centered on the vibration damping augmentation through a system consisting of active and passive damping members. An active member is a structural member with built-in piezoelectric actuator and sensors. A bridge feedback technique developed in the communication engineering is applied locally to the active member for active damping augmentation. An efficient method was developed for optimal placement of active and passive damping members in the truss-type backup structure. A simple synergistic model between the active and passive damping was proposed based on a weighted energy dissipation criterion. A baseline passive member design with constrained viscoelastic material treatment was used as the source of passive damping.

Paper Details

Date Published: 20 September 1989
PDF: 13 pages
Proc. SPIE 1114, Active Telescope Systems, (20 September 1989); doi: 10.1117/12.960852
Show Author Affiliations
G-S. Chen, California Institute of Technology (United States)
J. A. Garba, California Institute of Technology (United States)
B. K. Wada, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1114:
Active Telescope Systems
Francois J. Roddier, Editor(s)

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