Load Resistance Optimization of a Broadband Bistable Piezoelectric Energy Harvester for Primary Harmonic and Subharmonic Behaviors
| Autor: | Sungryong Bae, Pilkee Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
bistable oscillator
Bistability Acoustics Geography Planning and Development TJ807-830 02 engineering and technology Management Monitoring Policy and Law Seismic noise TD194-195 01 natural sciences Renewable energy sources 0103 physical sciences GE1-350 010301 acoustics Parametric statistics Physics Environmental effects of industries and plants Renewable Energy Sustainability and the Environment Oscillation 021001 nanoscience & nanotechnology Piezoelectricity piezoelectric energy harvester Environmental sciences Harmonic frequency response analysis 0210 nano-technology load resistance optimization Energy harvesting Energy (signal processing) |
| Zdroj: | Sustainability, Vol 13, Iss 2865, p 2865 (2021) Sustainability Volume 13 Issue 5 |
| ISSN: | 2071-1050 |
| Popis: | In this study, optimization of the external load resistance of a piezoelectric bistable energy harvester was performed for primary harmonic (period-1T) and subharmonic (period-3T) interwell motions. The analytical expression of the optimal load resistance was derived, based on the spectral analyses of the interwell motions, and evaluated. The analytical results are in excellent agreement with the numerical ones. A parametric study shows that the optimal load resistance depended on the forcing frequency, but not the intensity of the ambient vibration. Additionally, it was found that the optimal resistance for the period-3T interwell motion tended to be approximately three times larger than that for the period-1T interwell motion, which means that the optimal resistance was directly affected by the oscillation frequency (or oscillation period) of the motion rather than the forcing frequency. For broadband energy harvesting applications, the subharmonic interwell motion is also useful, in addition to the primary harmonic interwell motion. In designing such piezoelectric bistable energy harvesters, the frequency dependency of the optimal load resistance should be considered properly depending on ambient vibrations. |
| Databáze: | OpenAIRE |
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