Optimal Active Vibration Absorber: Design and Experimental Results

[+] Author and Article Information
G. Lee-Glauser

Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY 13699

Jer-Nan Juang

Spacecraft Dynamics Branch, NASA Langley Research Center, Hampton, VA 23665

J. L. Sulla

Lockheed Engineering and Sciences Company, Hampton, VA 23665

J. Vib. Acoust 117(2), 165-171 (Apr 01, 1995) (7 pages) doi:10.1115/1.2873874 History: Received April 01, 1993; Revised September 01, 1993; Online February 26, 2008


An optimal active vibration absorber can provide guaranteed closed-loop stability and control for large flexible space structures with collocated sensors/actuators. The active vibration absorber is a second-order dynamic system which is designed to suppress any unwanted structural vibration. This can be designed with minimum knowledge of the controlled system. Two methods for optimizing the active vibration absorber parameters are illustrated: minimum resonant amplitude and frequency matched active controllers. The Controls-Structures Interaction Phase-1 Evolutionary Model at the NASA Langley Research Center is used to demonstrate the effectiveness of the active vibration absorber for vibration suppression. Performance is compared numerically and experimentally using acceleration feedback.

Copyright © 1995 by The American Society of Mechanical Engineers
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