Experimental and Computational Study of Vibration-Based Energy Harvesting Systems for Self-Powered Devices

Energy harvesting of ambient and aeroelastic vibrations is important for reducing the dependence of wireless sensing and networks on batteries. We develop a configuration for a piezoelectric energy harvester with the capability to wirelessly communicate vibration measurements while using those vibrations to power the sensing and communication devices. Particularly, we perform experiments that aim at identifying challenges to overcome in the development of such a configuration. Towards that objective, we successfully tested a self-powered real-time point-to-point wireless communication system between a vibration sensor and transmission and receiving modules. The sensing device and transmission module are powered by the vibrating object using a piezoelectric energy harvester. The communication is established by using two XBee modules. In the second part of this dissertation, we address the optimization of the output power of piezoelectric energy harvesters of aeroelastic vibrations. Given the complexity of high-fidelity simulations of the coupling between the fluid flow, structural response and piezoelectric transduction, we develop and experimentally validate a phenomelogical reduced-order model for energy harvesting from wake galloping. We also develop a high-fidelity simulation for the same phenomena. The modeling and high-fidelity simulations can be a part of a multi-disciplinary optimization framework to be used in the design and operation of galloping-based energy harvesters.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Engineering Mechanics

Department dc:contributor.department

Engineering Science and Mechanics

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2021

Author dc:creator

• Alnuaimi, Saeed Khalfan

Chairs dc:contributor.committeechair

• Hajj, Muhammad Ramiz
• Ragab, Saad A.

Committee members dc:contributor.committeemember

• Zuo, Lei
• Thangjitham, Surot
• Untaroiu, Alexandrina

• Method of multiple scales
• Energy harvesting
• Piezoelectric materials
• Galloping
• Phenomenological modeling
• Nonlinear damping
• XBee Communication
• piezoelectric
• composite material.Numerical simulation
• CFD
• Ansys Fluent.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

vt_gsexam:28985

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/111225