Significant interest has been generated by the possibilities of active vibration control through the implementation of state switching, with a specific implementation embodied through piezoceramic shunting. A state-switched absorber (SSA) is a vibration absorber that has the unique ability to change its resonant state amongst multiple distinct resonant states while in motion, thereby increasing the effective bandwidth over that of a single frequency device and thereby allowing control of multi-frequency, transient, and time-varying disturbances. In contrast, a switch-shunted damper (SSD) is a variant of an SSA that is used to increase the damping of the structure to which the damper is applied. Active vibration control applications discussed in the literature indicate the potential advantages of SSDs which employ piezoelectric ceramics as switchable springs with control algorithms that require switching states at points of non-zero strain. However, consideration of the constitutive equations for piezoelectric materials indicates a discontinuity in the electrical and mechanical conditions imposed by switching the stiffness at non-zero strains. A prototype SSD has been built and tested to experimentally investigate switching control logic and electrical and mechanical discontinuities at switching points; experimental measurements with this prototype SSD indicate that quarter-cycle switching algorithms which include switching states at a condition of maximum strain yield enhanced damping effectiveness but also leads to the generation of potentially undesirable mechanical transients.
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April 2004
Technical Papers
Quarter-Cycle Switching Control for Switch-Shunted Dampers
Gregg D. Larson,
Gregg D. Larson
The George W. Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
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Kenneth A. Cunefare
Kenneth A. Cunefare
The George W. Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
Search for other works by this author on:
Gregg D. Larson
The George W. Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
Kenneth A. Cunefare
The George W. Woodruff School of Mechanical Engineering, The Georgia Institute of Technology, Atlanta, GA 30332-0405
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received November 2001; Revised June 2003. Associate Editor: Chin An Tan.
J. Vib. Acoust. Apr 2004, 126(2): 278-283 (6 pages)
Published Online: May 4, 2004
Article history
Received:
November 1, 2001
Revised:
June 1, 2003
Online:
May 4, 2004
Citation
Larson , G. D., and Cunefare , K. A. (May 4, 2004). "Quarter-Cycle Switching Control for Switch-Shunted Dampers ." ASME. J. Vib. Acoust. April 2004; 126(2): 278–283. https://doi.org/10.1115/1.1687394
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