Vibration energy harvesting from multi-directional motion sources

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1 Citation (Scopus)

Abstract

Vibration energy harvesting can be used as a sustainable power source for various applications. Usually, the generators are designed as devices with a single degree of freedom (SDoF) along the direction of the driving motion. In this research, harvesting from multi-directional (translational) motion sources will be investigated. Three strategies are assessed: a reference SDoF generator, a SDoF generator using an orientation strategy, and a Multi Degree of Freedom (MDoF) system. This led to the development of a design metric by which any 2D design problem can be described by two dimensionless parameters: the relative strength of vibrations, pv, and the relative dimension of the design space, pl. It was shown that the relative power density (RPD) of a 2DoF system compared to a reference SDoF system only depends on the product p=pvpl, and has a maximum of 1.185 for p=1. The application of powering a hearing aid is investigated as a case study. It was found that the vibrations in the area of the human head while walking can be represented by a two-directional vibration source with pv=0.55. Three different design spaces are assessed for a miniaturized generator and three different optimal embodiments are found. For one of the considered situations where p=1.1, a 2DoF system was found to have a 16% higher power output compared to a SDoF reference. The aim of future work will be the validation of the developed metric.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Manipulation, Automation and Robotics at Small Scales (MARSS 2018)
EditorsSergej Fatikow, Sinan Haliyo, Fumihito Arai, Albert Sill
Place of PublicationPiscataway, NJ, USA
PublisherIEEE
Number of pages9
ISBN (Electronic)978-1-5386-4841-4
ISBN (Print)978-1-5386-4842-1
DOIs
Publication statusPublished - 2018
EventMARSS 2018: 3rd International Conference on Manipulation, Automation and Robotics at Small Scales - Nagoya, Japan
Duration: 4 Jul 20188 Jul 2018

Conference

ConferenceMARSS 2018: 3rd International Conference on Manipulation, Automation and Robotics at Small Scales
CountryJapan
CityNagoya
Period4/07/188/07/18

Keywords

  • Head area
  • Human motion
  • Multi degree of freedom
  • Multi-direction
  • Vibration energy harvesting

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