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A Self-Tunable Piezoelectric Energy Harvester, Ashraf Hussein
A Self-Tunable Piezoelectric Energy Harvester, Ashraf Hussein
Theses and Dissertations
In this study, a new technique to harvest energy using inertial vibration energy harvesters is introduced. A triple-layer piezoelectric beam with a self-tunable frequency was developed in order to respond to variable-frequency excitations, thereby maintaining the beam in a state of resonance for maximum power output. The tuning mechanism managed to change the natural frequency of the beam in the range of 2.27 ���� to 6.25 ����. In this case, the output voltage could be raised from 12�� to 23��.
A mathematical model was developed to investigate the natural frequency, the output voltage, and the output power of the beam …