Parametric Control of Structural Vibrations via Adaptable Stiffness Dynamic Absorbers

[+] Author and Article Information
J. S. Lai, K. W. Wang

Mechanical Engineering Department, The Pennsylvania State University, University Park, PA 16802

J. Vib. Acoust 118(1), 41-47 (Jan 01, 1996) (7 pages) doi:10.1115/1.2889633 History: Received December 01, 1993; Revised August 01, 1994; Online February 26, 2008


An energy-based algorithm is developed for dynamic absorbers with adaptable stiffness to suppress structural vibrations via real-time parametric control actions. A controller with multi-objective fuzzy logic is created to reduce the main structure energy while constraining the total system energy. To ensure stability, an adaptive-passive supervisor is designed to provide guidelines for implementing the control law. It is proved that the system using this supervisor is globally stable in the sense that all signals involved are bounded. The performance of the controller is demonstrated on a beam example. It is shown that the structure energy level and vibration amplitude can be suppressed effectively.

Copyright © 1996 by The American Society of Mechanical Engineers
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