Improved Power Output by a Piezoelectric Cantilever after Addition of a Cylindrical Bar

원통 봉을 적용한 압전 캔틸레버의 성능 향상

  • Lee, Youngjin (Electronic Materials & Module Team, Korea Institute of Ceramic Engineeing & Technolongy) ;
  • Kim, Seiki (Electronic Materials & Module Team, Korea Institute of Ceramic Engineeing & Technolongy) ;
  • Kim, Young-Deuk (Department of Mechanical Engineering, Hanyang University)
  • 이영진 (한국세라믹기술원 전자소재.모듈팀) ;
  • 김세기 (한국세라믹기술원 전자소재.모듈팀) ;
  • 김영득 (한양대학교 기계공학과)
  • Received : 2014.07.08
  • Accepted : 2014.08.20
  • Published : 2014.09.30


This paper describes the development of a new piezoelectric unimorph cantilever structure intended to improve electrical output power, compared to a conventional cantilever. The proposed structure employs a cylindrical bar attached to one side of a steel plate, which is a significant factor in forced vibration mode. The feasibility of the proposed methodology was assessed experimentally and theoretically. The influence of three different types of bar material (i.e., stainless steel, silicon rubber, and urethane), and bar position, on the output voltage were examined and compared with those without the bar. The optimal position and material for the bar were identified through experimental and theoretical analyses. It appears that the electrical output power of the proposed cantilever is about 40% higher than that of a conventional unimorph cantilever.


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