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TECHNICAL PAPERS

A Novel Semi-Active Multi-Modal Vibration Control Law for a Piezoceramic Actuator

[+] Author and Article Information
Lawrence R. Corr, William W. Clark

Vibration and Control Laboratory, Mechanical Engineering Department, University of Pittsburgh, Pittsburgh, PA 15261e-mail: bluetick@pitt.edu

J. Vib. Acoust 125(2), 214-222 (Apr 01, 2003) (9 pages) doi:10.1115/1.1547682 History: Received May 01, 2001; Revised September 01, 2002; Online April 01, 2003
Copyright © 2003 by ASME
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References

Figures

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Type II mechanical spring
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(a) coupled structure and piezoceramic element shown with arbitrary charge, Qapp, applied to the piezoceramic (b) system shown with switched RL shunt circuit
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Example of a modal system with a piezoceramic spring
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Simple six degree of freedom mechanical system with an attached piezoceramic-resistor/inductor (RL) shunt actuator
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Modal response of system for single mode control
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Normalized energy of all modes for single mode control. The total structural energy is marked as “Etot,” and each individual mode’s energy is marked as E1−E6.
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Rate of change of energy for control mode and voltage across piezoceramic actuator for single mode control
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Modal response of system for multi-mode control (modes 1–3 are controlled)
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Normalized energy of all modes for multi-mode control. The total structural energy is marked as “Etot,” and each individual mode’s energy is marked as E1−E6.
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Rate of change of energy for control modes and voltage across piezoceramic actuator for multi-mode control
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Experimental test structure
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Digital switching circuit for multi-modal pulse-switched control
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Frequency response function with 2nd mode targeted
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Frequency response function with 2nd, 3rd, and 4th, modes targeted

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