Multimodal Energy Harvesting Efficiency Enhancement via Linear Matrix Inequalities Control Driven

Authors

  • Douglas da Costa Ferreira
  • Fábio Roberto Chavarette
  • Luiz Ricardo de Almeida
  • Renato Santos de Souza
  • Luis Paulo Morais Lima

DOI:

https://doi.org/10.5540/03.2016.004.01.0012

Keywords:

Energy harvesting, Multimodal, Efficiency, Liner Matrix Inequalities, Controller

Abstract

There are several solutions to enhance energy harvesting efficiency and is highlighted as the most promised state of the art research the active control driven for increase mechanical energy transformation from vibration to electric energy. The control driven uses the impulse to curt circuit the piezoelectric film and takes advantage of piezoelectric indirect effect. The controller changes the relative stiffness, damping and mass of the studied system and consequently changes the system natural frequency. It is imposed velocity and acceleration to the system to combine the exogenous excitation to system parameters and resulting in maximum mechanical energy transfer. A numeric simulation was lead using a Linear Matrix Inequalities controller applied to a multimodal energy harvester. As main result the controller increased the energy harvester efficiency up to 4 times.

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Published

2016-08-09