Applying Nonlinear Restoring Force to Improve the Performance of Acoustic PZT Energy Harvesters

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 460

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شناسه ملی سند علمی:

ISAV09_039

تاریخ نمایه سازی: 11 دی 1398

چکیده مقاله:

Acoustic energy harvesting using quarter-wavelength resonator tubes suffers from a variable acoustic resonant frequency that stems from fluid-solid interactions. This paper proposes a novel acoustic energy harvester that operates efficiently in the presence of a variable acoustic frequency utilizing a magnetic restoring force. The paper also provides a comprehensive anal-ysis of PZT energy harvesting from the developed acoustic wave in a quarter-wavelength res-onator tube. The system is composed of a magnetically coupled bimorph PZT beam housed in a resonator tube. The tube is exposed to an incident wave. First, a nonlinear lumped-parameter electromechanical model governing the system dynamics is provided. Then, using the har-monic balance method (HBM), an approximate analytical solution is obtained. The effects of different tube parameters and sound pressure level (SPL) on the deflection and generated volt-age are studied. Next, the influence of the applied nonlinear force on the system response is investigated. The results reveal that the external force neutralizes the frequency shifts and can tune the resonance frequency of the beam such that it coincides with the tube eigenfrequencies.

نویسندگان

Masoud Rezaei

PhD student, Mechanical Engineering faculty, Iran University of Science and Technonlogy, Narmak, ۱۶۸۴۶-۱۳۱۱۴, Tehran, Iran.

R Talebitooti

Associate Professor, Mechanical Engineering faculty, Iran University of Science and Technonlogy, Narmak, ۱۶۸۴۶-۱۳۱۱۴, Tehran, Iran.

M.I Friswell

Professor, College of Engineering, Swansea University, Crymlyn Burrows, Swansea SA۱ ۸EN, UK.