Vibration Suppression For Precision Segmented Reflector Backup Structure

G-S. Chen; J. A. Garba; B. K. Wada

doi:10.1117/12.960852

20 September 1989 Vibration Suppression For Precision Segmented Reflector Backup Structure

G-S. Chen, J. A. Garba, B. K. Wada

Proceedings Volume 1114, Active Telescope Systems; (1989) https://doi.org/10.1117/12.960852
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.960852

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