Electrical and Computer Engineering ETDs

Publication Date

Summer 7-28-2026

Abstract

The purpose of this thesis is to investigate and develop dynamic proof-mass configurations for broadband piezoelectric energy harvesting. Conventional piezoelectric energy harvesters are typically limited by narrow operating bandwidths, restricting their performance under variable-frequency excitation. This research presents the design, fabrication, and experimental evaluation of multiple proof-mass concepts intended to increase the usable frequency range of cantilever-based piezoelectric energy harvesters. Several dynamic mass configurations were developed using additive manufacturing techniques and integrated with commercially available piezoelectric cantilevers. Experimental testing was conducted under controlled vibration conditions to characterize voltage response, resonant behavior, and bandwidth performance. The results demonstrate that dynamic proof-masses can significantly broaden the operational frequency range compared to conventional fixed-mass designs. The findings demonstrate the effectiveness of passive bandwidth enhancement techniques and contribute to the development of piezoelectric energy harvesters better suited for real-world environments with varying vibration frequencies.

Keywords

Piezoelectric, energy harvesting, bandwidth

Project Sponsors

NSF

Document Type

Thesis

Language

English

Degree Name

Electrical Engineering

Level of Degree

Masters

Department Name

Electrical and Computer Engineering

First Committee Member (Chair)

Nathan Jackson

Second Committee Member

Matthias Pleil

Third Committee Member

Ali Bidram

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