Modelling of a Bi-axial Vibration Energy Harvester

Abstract

This report fully details the techniques involved in the modelling of a nonlinear and bi-axial vibration energy harvesting device. The device utilises a wire-coil electromagnetic (EM) transducer within a nonlinear oscillator created with a permanent-magnet/ball-bearing arrangement. The mechanical oscillations of the ball-bearing in response to bi-axial vibrations in a host structure induce a voltage across the coil, and therefore energy to power an attached device - such as an in-situ structural health monitoring system on an aircraft platform. Modelling the mechanical dynamics and the transduction of the harvester is undertaken, by means of finite element analysis (FEA), the homotopy analysis method (HAM), a novel probability-of-existence approach to vibro-impact, and numeric EM calculations. The models produced demonstrate high accuracy in comparison to a laboratory prototype.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2013
Accession Number
ADA587371

Entities

People

  • Luke A. Vandewater
  • Scott D. Moss

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Computations
  • Computer Science
  • Differential Equations
  • Energy Harvesting
  • Engineering
  • Finite Element Analysis
  • Frequency
  • Geometry
  • Magnetic Fields
  • Materials
  • Monitoring
  • Parallel Computing
  • Structural Health Monitoring
  • Three Dimensional
  • Transducers
  • Vibration

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Structural Dynamics.