Publication: Design of 3-axial vibration energy harvester (VEH) using a shear-type piezoelectric actuator
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Date
2024-07-12
Authors
Andre, Ng
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Abstract
Vibration is often considered a waste byproduct in many operational machinery. However, it can present a valuable opportunity for energy harvesting. By
harnessing this ambient vibration through the direct piezoelectric effect, it is possible to generate low-voltage electricity which is capable of powering miniature devices. This research focuses on the design and development of two models of piezoelectric PVEH using a P-153.10 PICA Shear Actuator. PVEH 1 utilises a rigid direct clamp on the piezoelectric material, whereas PVEH 2 incorporates a compressed spring in its clamp for added flexibility. A LabVIEW Virtual Instrument (VI) was developed to control a shaker that excites the PVEHs and to acquire data on the harvested voltage. Experimentally, it was found that PVEH 1 harvested a maximum voltage of 0.407 V whereas PVEH 2 only achieved 0.279 V. The maximum voltage was harvested when the PVEHs were subjected to a shaker input voltage of 5 V with a frequency of 100 Hz. Moreover, a strong correlation was discovered between the compressive force acting on the piezoelectric material and the harvested voltage. Experimental modal analyses (EMA) conducted on the PVEH models found no resonant frequency in the range of 100 Hz to 500 Hz, indicating that the PVEHs were not functioning at their highest potential during the experiments.