Micromachines (Jan 2023)

Multi-Objective Topology Optimization of a Broadband Piezoelectric Energy Harvester

  • Siyang Hu,
  • Ulrike Fitzer,
  • Khai Chau Nguyen,
  • Dennis Hohlfeld,
  • Jan G. Korvink,
  • Tamara Bechtold

DOI
https://doi.org/10.3390/mi14020332
Journal volume & issue
Vol. 14, no. 2
p. 332

Abstract

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In recent years, topology optimization has proved itself to be state of the art in the design of mechanical structures. At the same time, energy harvesting has gained a lot of attention in research and industry. In this work, we present a novel topology optimization of a multi-resonant piezoelectric energy-harvester device. The goal is to develop a broadband design that can generate constant power output over a range of frequencies, thus enabling reliable operation under changing environmental conditions. To achieve this goal, topology optimization is implemented with a combined-objective function, which tackles both the frequency requirement and the power-output characteristic. The optimization suggests a promising design, with satisfactory frequency characteristics.

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