Altering the natural frequencies of cantilevered piezoelectric membranes using negative capacitance circuits

Michael R. Fontaine; Miles A. Wickersham; Umesh A. Korde

doi:10.1117/12.815807

6 April 2009 Altering the natural frequencies of cantilevered piezoelectric membranes using negative capacitance circuits

Michael R. Fontaine, Miles A. Wickersham, Umesh A. Korde

Author Affiliations +

Proceedings Volume 7288, Active and Passive Smart Structures and Integrated Systems 2009; 728805 (2009) https://doi.org/10.1117/12.815807
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

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.

Citation Download Citation

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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