Abstract
Vibration energy harvesting by exploiting the multimodal approach in a quasi-periodic system is proposed. The quasi-periodic system, based on electromagnetic transduction, consists of two weakly coupled magnets mechanically guided by two elastic beams. Mistuning is achieved by varying the mechanical stiffness of one of the beams. These imperfections will lead to the vibration energy localization in regions close to the imperfections which will be exploited to maximize the harvested energy.
Highlights
The diversity of ambient sources of energy arouses researchers to make its scavenging a focus of interest
Having already adopted the second configuration, we propose to conduct a multiobjective optimization aimed at maximizing simultaneously the harvested power and the modal localization ratio
A vibration energy harvester based on modal localization is proposed
Summary
The diversity of ambient sources of energy arouses researchers to make its scavenging a focus of interest. We are interested in a vibration energy harvester (VEH) by exploiting the multimodal approach [1], which involves operating multiple modes in a periodic system. Depending on the magnitude of the disorder and the strength of the internal coupling of the system, it is possible to localize the vibration energy in regions close to the imperfections [4]. We introduce an irregularity in the mechanical stiffness of one of the two beams. This phenomenon will be exploited to maximize the harvested energy. Numerical simulations have been performed to highlight the benefits of the localization on the VEH in terms of harvested power. The optimal mistuning can be determined in order to enhance the performances of the proposed device
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