A novel controller to increase harvested energy from negating vibration-suppression effect

Kanjuro Makihara, Yuta Yamamoto, Kenji Yoshimizu, Chikahiro Horiguchi, Hitoshi Sakaguchi, Katsumi Fujimoto

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

This paper proposes an innovative energy-harvesting controller to increase energy harvested from vibrations. Energy harvesting is a process that removes mechanical energy from a vibrating structure, which necessarily results in damping. The damping associated with piezoelectric energy harvesting suppresses the amplitude of mechanical vibration and reduces the harvested energy. To address this critical problem, we devise an energy-harvesting controller that maintains the vibration amplitude as high as possible to increase the harvested energy. Our proposed switching controller is designed to intentionally stop the switching action intermittently. We experimentally demonstrate that the proposed control scheme successfully increases the harvested energy. The piezoelectric voltage with the proposed controller is larger than that with the original synchronized switching harvesting on inductor (SSHI) technique, which increases the harvested energy. The stored energy with our controller is up to 5.7 times greater than that with the conventional SSHI control scheme.

Original languageEnglish
Article number037005
JournalSmart Materials and Structures
Volume24
Issue number3
DOIs
Publication statusPublished - 2015 Mar 1

Keywords

  • SSHI
  • energy harvesting
  • piezoelectric

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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