Active member vibration control for a 4 meter primary reflector support structureThe design and testing of a new low voltage piezoelectric active member with integrated load cell and displacement sensor is described. This active member is intended for micron level vibration and structural shape control of the Precision Segmented Reflector test-bed. The test-bed is an erectable 4 meter diameter backup support truss for a 2.4 meter focal length parabolic reflector. Active damping of the test-bed is then demonstrated using the newly developed active members. The control technique used is referred to as bridge feedback. With this technique the internal sensors are used in a local feedback loop to match the active member's input impedance to the structure's load impedance, which then maximizes vibrational energy dissipation. The active damping effectiveness is then evaluated from closed loop frequency responses.
Document ID
19920051692
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Umland, J. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chen, G.-S. (JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
AIAA PAPER 92-2341
Meeting Information
Meeting: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference