Harvesting strategy to increase electrical energy for piezoelectric active harvesting

Kenji Yoshimizu, Yuta Yamamoto, Kanjuro Makihara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we present control strategies to increase electrical energy for active harvesting. Vibrational energy harvesting extracts electrical energy from structural vibration. To increase the harvested energy, synchronized switch harvesting on inductor (SSHI) technique was proposed. With the switching action, SSHI effectively converts mechanical energy into electrical energy. We experimentally confirm that the vibrational amplitude and the harvested energy are decreased with SSHI. To solve this critical problem, we devise control strategies that are SCVS (Switching Considering Vibration Suppression) and ASCVS (Adaptive SCVS) to increase the harvested energy. Original SSHI conducts switching action at every peak of vibrational displacement. Our control strategies are designed to temporarily stop the switching action. The vibrating structure is excited to vibrate by a vibration shaker. While switching action is stopped, vibrational amplitude will be recovered from the suppressed amplitude by excitation force. The proposed control strategies can maintain the vibrational amplitude as high as possible. Accordingly, the harvested energy increases. We experimentally demonstrate that the proposed strategies increase the harvested energy. Experimental results show that the stored energy with our techniques is up to 10.5 times greater than that with the original SSHI technique. Moreover, ASCVS (Adaptive SCVS) is shown to be more flexible to increase harvested energy in various vibration conditions.

Original languageEnglish
Title of host publication26th International Conference on Adaptive Structures and Technologies, ICAST 2015
PublisherInternational Conference on Adaptive Structures and Technologies
ISBN (Electronic)9781510821897
Publication statusPublished - 2015 Jan 1
Event26th International Conference on Adaptive Structures and Technologies, ICAST 2015 - Kobe, Japan
Duration: 2015 Oct 142015 Oct 16

Publication series

Name26th International Conference on Adaptive Structures and Technologies, ICAST 2015

Other

Other26th International Conference on Adaptive Structures and Technologies, ICAST 2015
CountryJapan
CityKobe
Period15/10/1415/10/16

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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