A sensitivity analysis is presented for a novel tuned vibration absorber. The active tuning of the absorber is achieved using partial state feedback with a controlled time delay. The final structure, which is named Delayed Feedback Vibration Absorber (DFVA), is optimized to yield minimum of the primary system involved for a given wide band of excitation frequencies. The optimization is performed over the absorber’s structural properties and the feedback control parameters. An optimal tuning over optimally designed passive absorber is conducted first, and separately a collective optimization over both the absorber structure and the control is studied. The assurance of the stability of the time-delayed system, which forms a critical constraint on the optimization, is also discussed. Regardless of the nature of the optimal operation, the parametric variations in the structure can influence the vibration absorption performance significantly. This concern is addressed via a sensitivity analysis. Primarily, the variations on the absorber stiffness and damping properties are studied. The findings of this effort provide tools for determining the acceptable tolerance limits of the absorber properties. [S0022-0434(00)02202-4]
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June 2000
Technical Papers
A Sensitivity Study on Optimum Delayed Feedback Vibration Absorber
Nader Jalili, Assistant Professor, Assoc. Mem. ASME,,
Nader Jalili, Assistant Professor, Assoc. Mem. ASME,
Department of Mechanical Engineering, Northern Illinois University, DeKalb, IL 60115-2854
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Nejat Olgac, Professor, Fellow ASME,
Nejat Olgac, Professor, Fellow ASME,
Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269-3139
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Nader Jalili, Assistant Professor, Assoc. Mem. ASME,
Department of Mechanical Engineering, Northern Illinois University, DeKalb, IL 60115-2854
Nejat Olgac, Professor, Fellow ASME,
Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269-3139
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division August 10, 1998. Associate Technical Editor: S. D. Fassois.
J. Dyn. Sys., Meas., Control. Jun 2000, 122(2): 314-321 (8 pages)
Published Online: August 10, 1998
Article history
Received:
August 10, 1998
Citation
Jalili, N., and Olgac, N. (August 10, 1998). "A Sensitivity Study on Optimum Delayed Feedback Vibration Absorber ." ASME. J. Dyn. Sys., Meas., Control. June 2000; 122(2): 314–321. https://doi.org/10.1115/1.482457
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