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Vers une meilleure exploitation des dispositifs de récupération d’énergie vibratoire bistables : Analyse et utilisation de comportements originaux pour améliorer la bande passante

Abstract : This thesis concerns vibratory energy harvesting in order to propose an alternative to conventional batteries for the power supply of autonomous wireless systems. This would improve their compactness (less stored energy), their resistance to harsh environments (high temperature) and reduce their need for maintenance. This study focuses in particular on bistable oscillating generators, which are interesting for their large useful frequency range compared to that offered by linear generators (limited to the resonance zone). This thesis is divided into four main parts. The first presents the construction of the mathematical model to predict the different behaviors of the bistable generator (these behaviors can coexist over certain frequency ranges) including the study of stability to small disturbances. This model highlights original behaviors for energy recovery: subharmonic behaviors whose frequency range allows increasing the overall generator bandwidth. In order to improve the accuracy of the model, a semi-analytical criterion is then added: the stability robustness criterion which characterizes the sensitivity of the different behaviors to external disturbances (the more robust a behavior, the easier to maintain over time). The model obtained and the experimental prototype show a wide frequency range on which the interesting behaviors (high orbits) and the undesirable behaviors (low orbits) coexist. The third part of this thesis therefore presents different strategies for jumping from low to high orbits by playing directly on the generator parameters. Finally, the fourth and last part focuses on the influence of the AC-DC interface circuit between the bistable generator and the load for future integration.
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  • HAL Id : tel-01957377, version 3

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Thomas Huguet. Vers une meilleure exploitation des dispositifs de récupération d’énergie vibratoire bistables : Analyse et utilisation de comportements originaux pour améliorer la bande passante. Electronique. Université de Lyon, 2018. Français. ⟨NNT : 2018LYSEI113⟩. ⟨tel-01957377v3⟩

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