Article

Journal of Mechanical Science and Technology

, Volume 26, Issue 1, pp 137-143

Design optimization of piezoelectric energy harvester subject to tip excitation

  • Juil ParkAffiliated withDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology
  • , Soobum LeeAffiliated withDepartment of Aerospace and Mechanical Engineering, University of Notre Dame Email author 
  • , Byung Man KwakAffiliated withDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology

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Abstract

This research proposes a new design for a cantilever-type piezoelectric energy harvester in which a free tip is excited by any rotary motion of mechanical devices. A coupled field finite element model for the harvester is constructed using ANSYS and verification study is performed. Design optimization on the shape of the harvester is done to maximize output power. The design optimization result shows excellent performance when compared to a simple rectangular cantilever or the well-known tapered cantilever. The design results are prototyped and their improved performances are experimentally attested.

Keywords

Energy harvesting Piezoelectricity PVDF Vibration Rotary motion Tip excitation Shape optimization