Force Feedback in Adaptive Trusses for Vibration Isolation in Flexible Structures

[+] Author and Article Information
W. W. Clark

Mechanical Engineering Department, University of Pittsburgh, Pittsburgh, PA 15261

H. H. Robertshaw

Department of Mechanical Engineering, Center for Inteliigent Material Systems and Structures, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Dyn. Sys., Meas., Control 119(3), 365-371 (Sep 01, 1997) (7 pages) doi:10.1115/1.2801267 History: Received August 01, 1994; Online December 03, 2007


This paper addresses the transmission of unwanted vibrations in flexible structures by actively minimizing dynamic forces seen at critical locations within the structure. An adaptive truss serves as an active interface between the two isolated sides of the structure, and force-feedback within individual links of the truss is the governing control law. The use of an adaptive truss allows the problem to be viewed as a set of localized control problems with collocated sensors and actuators. This paper first discusses the ideal capabilities of force feedback for active vibration isolation, and then presents the analytical and experimental results of a case study which shows significant reduction in transmitted vibrations.

Copyright © 1997 by The American Society of Mechanical Engineers
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