Autonomous Resonance-Tuning Mechanism for Environmental Adaptive Energy Harvesting

Dong Gyu Lee, Joonchul Shin, Hyun Soo Kim, Sunghoon Hur, Shuailing Sun, Ji Soo Jang, Sangmi Chang, Inki Jung, Sahn Nahm, Heemin Kang, Chong Yun Kang, Sangtae Kim, Jeong Min Baik, Il Ryeol Yoo, Kyung Hoon Cho, Hyun Cheol Song

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

An innovative autonomous resonance-tuning (ART) energy harvester is reported that utilizes adaptive clamping systems driven by intrinsic mechanical mechanisms without outsourcing additional energy. The adaptive clamping system modulates the natural frequency of the harvester's main beam (MB) by adjusting the clamping position of the MB. The pulling force induced by the resonance vibration of the tuning beam (TB) provides the driving force for operating the adaptive clamp. The ART mechanism is possible by matching the natural frequencies of the TB and clamped MB. Detailed evaluations are conducted on the optimization of the adaptive clamp tolerance and TB design to increase the pulling force. The energy harvester exhibits an ultrawide resonance bandwidth of over 30 Hz in the commonly accessible low vibration frequency range (<100 Hz) owing to the ART function. The practical feasibility is demonstrated by evaluating the ART performance under both frequency and acceleration-variant conditions and powering a location tracking sensor.

Original languageEnglish
JournalAdvanced Science
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • adaptive clamps
  • autonomous resonance-tuning
  • energy harvesting
  • piezoelectric
  • tuning beam

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Engineering(all)
  • Physics and Astronomy(all)

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