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Communication Dans Un Congrès Année : 2021

Statistical performance assessment of a bistable vibration energy harvester

Camille Saint-Martin
Ludovic Charleux
Émile Roux
Aya Benhemou
  • Fonction : Auteur
Adrien Badel

Résumé

Vibration energy harvesters allow the extraction of the ambient mechanical energy. Our analysis focuses on a bistable generator with Duffing nonlinearity. Bistable generators exhibit larger frequency bandwidth than linear monostable generators, but they exhibit complex behaviors (multiple periodic orbits and chaos), making their evaluation challenging. To assess the quality of a vibration energy harvester, it is necessary to evaluate its energy performance in a generic way. In this presentation, we describe a numerical approach to predict the probability of occurrence of each orbit regarding the initial conditions of the dynamical system. The estimation of the orbit probabilities and powers allowed us to calculate an expected power for each vibration frequency. This approach has been used to demonstrate that our generator has a constant expected harvested power for a driving frequency between 23 Hz and 55 Hz. Moreover, the choice of the initial conditions grid is fundamental since it affects the capture rate of the orbits and thus their probability of occurrence. Thanks to numerical simulations, we show that the initial conditions grid must be precise enough to ensure the reliability of the orbit probabilities derived with the proposed method.
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Dates et versions

hal-03386499 , version 1 (04-09-2023)

Identifiants

  • HAL Id : hal-03386499 , version 1

Citer

Camille Saint-Martin, Adrien Morel, Ludovic Charleux, Émile Roux, Aya Benhemou, et al.. Statistical performance assessment of a bistable vibration energy harvester. International Workshop on Piezoelectric Materials and Applications in Actuators, Oct 2021, Pennsylvania, United States. ⟨hal-03386499⟩
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