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6 April 2009 Altering the natural frequencies of cantilevered piezoelectric membranes using negative capacitance circuits
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Abstract
A negative capacitance circuit has been designed to change the effective natural frequency of a fixed-free piezoelectric strip attached to a non piezoelectric substrate. Experiments have investigated the extent to which resonances can be shifted using a redesigned negative capacitance circuit. The design replaces the resistive element in the feedback loop with a capacitor, effectively causing the behavior of the circuit to become frequency independent. A PVDF film was mechanically excited and the voltage generated from the piezoelectric effect fed to the circuit. This paper summarizes the theoretical model and describes ongoing experimental work.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael R. Fontaine, Miles A. Wickersham, and Umesh A. Korde "Altering the natural frequencies of cantilevered piezoelectric membranes using negative capacitance circuits", Proc. SPIE 7288, Active and Passive Smart Structures and Integrated Systems 2009, 728805 (6 April 2009); https://doi.org/10.1117/12.815807
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