A Sensitivity Study on Optimum Delayed Feedback Vibration Absorber

[+] Author and Article Information
Nader Jalili

Department of Mechanical Engineering, Northern Illinois University, DeKalb, IL 60115-2854

Nejat Olgac

Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269-3139 e-mail: olgac@eng2.uconn.edu

J. Dyn. Sys., Meas., Control 122(2), 314-321 (Aug 10, 1998) (8 pages) doi:10.1115/1.482457 History: Received August 10, 1998
Copyright © 2000 by ASME
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Flowchart for the optimization procedure
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Implementation of a DFVA on a SDOF structure
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The frequency responses for different settings
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Stability envelope for: (a) optimum DFVA-OPA and (b) optimum DFVA
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Root locus plots for: (a) optimum DFVA-OPA with fixed time delay τ=0.0709 ms and (b) optimum DFVA with fixed time delay τ=0.7305 ms
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Optimization iteration steps
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Variations of the optimum: (a) spring stiffness and (b) damping coefficient
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Primary structure equipped with absorber
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(a) Passive absorber and (b) delayed absorber with acceleration feedback
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The DFVA implementation on an n-DOF structure
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A typical feasible region for the absorber parameters (a) control parameters and (b) structural properties.




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