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20 September 1989 Vibration Suppression For Precision Segmented Reflector Backup Structure
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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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G-S. Chen, J. A. Garba, and B. K. Wada "Vibration Suppression For Precision Segmented Reflector Backup Structure", Proc. SPIE 1114, Active Telescope Systems, (20 September 1989);

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