Date of Award
12-1-2021
Degree Name
Doctor of Philosophy
Department
Engineering Science
First Advisor
Wang, Fengxia
Second Advisor
Koc, Rasit
Abstract
The aim of this thesis is to develop and investigate impact-based frequency up-conversion mechanisms to enhance the performance of the piezoelectric energy harvesters. Five different mechanisms are designed that use cantilever type piezoelectric transducers, and for each of them, mathematical models of the piezoelectric transducer are constructed by applying the discontinuous dynamics theory. The constructed mathematical models are analyzed to provide a deep understanding of the mechanical and electrical performance of the piezoelectric energy harvester, which enables us to optimize the system parameters to generate the maximum power. The numerical investigation illustrates that the impact-based frequency up-conversion mechanism can significantly improve the performance of the energy harvester.
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