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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Mathematical Model for a Mode-sequence Reversed Two-degrees-of-freedom Piezoelectric Vibration Energy Harvester

모드 순서 전환된 2자유도계 압전 진동 에너지 수확 장치의 수학적 모델

  • Lee, Sowon (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Yoon Young (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Jae Eun (School of Mechanical and Automotive Engineering, Catholic University of Daegu)
  • Received : 2013.04.09
  • Accepted : 2013.05.29
  • Published : 2013.06.20
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Abstract

A cantilevered piezoelectric energy harvester(PEH) and an auxiliary mass-spring unit can be integrated into a novel two-degrees-of-freedom PEH where its lowest eigenmode is not an in-phase modes but an out-of-phase mode. This typical behavior was shown to enhance output power considerably compared with its stand-alone counterpart. The objective of this study is to newly develop a continuum-based mathematical model suitable for efficient analysis of the mode-sequence reversed PEH. Once such a mathematical model is available, various physical behaviors can be analytically investigated for better designs. After a new mathematical model is developed, its validity is checked by using ANSYS results, in terms of resonant frequency, open-circuit voltage, and output power with a specified external resistance.

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References

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