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Modélisation et optimisation mécanique d'un récupérateur piézoélectrique d'énergie vibratoire
| Content Provider | Semantic Scholar |
|---|---|
| Author | Paquin, Simon |
| Copyright Year | 2011 |
| Abstract | In recent years, researchers have shown a growing interest in the possibility of harvesting mechanical energy from vibrating structures. A common way to proceed consists of using the direct piezoelectric effect of a bimorph cantilever beam with integrated piezoelectric elements. Several studies focused on the development of analytical models describing the performance of a piezoelectric energy harvester. However, most of these models have been limited to simple structures and few studies have been dedicated to the optimization of the harvester's geometry. This work aims to study energy harvesting from vibrations in order to elaborate an optimal design of piezoelectric harvester. Piezoelectricity is first described in order to adequately integrate the piezoelectric volume to a vibrating structure. A detailed analysis of models is next presented to highlight the vibration energy harvesting basis. From this analysis, a semi-analytical mechanical model is developed using Rayleigh-Ritz approximations and integrated to an electromechanical model. Once the semi-analytical model is validated by a finite element analysis, numerical simulations are performed using the electromechanical model and set the optimization problem for the harvester geometry. A genetic algorithm is finally used to maximize the harvesting power. The optimal geometry allows harvesting a maximal power of 62.8 mW when the harvester is subjected to a harmonic input excitation of 100 Hz and an acceleration amplitude of 9.81 m.s 2 , which consists of an energy density ofO.38mW.g-. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://corpus.ulaval.ca/jspui/bitstream/20.500.11794/22430/1/27833.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
