Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Use of High Order Vibration Modes for Design of Piezo Energy Harvester

압전 발전기의 설계를 위한 고차 모드의 활용

  • 황우석 (대구대학교 기계.자동차공학부)
  • Received : 2012.02.08
  • Accepted : 2012.03.16
  • Published : 2012.04.20
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Abstract

The most common type of the piezoelectric energy harvester is the cantilevered beam since it is attached to the host structure and tuned to the frequency of the base excitation easily. However, the excessive strain at the fixed end of cantilevered beam causes some problems such as fatigue and durability. The use of higher vibration modes of the cantilevered beam may reduce the concentration of the strain at the fixed end since the strains of higher modes are distributed along the span. The results show that the use of high vibration mode is not efficient for power generation, but it reduces the excessive strain lever at typical region to prevent the failure by fatigue.

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References

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