위상차를 이용한 파라메트릭 진동자의 비선형 강성 특성 분석
Analysis on Nonlinear Elasticity of a Parametric Oscillator Based on Phase Difference
- 발행기관 서강대학교 일반대학원
- 지도교수 이승엽
- 발행년도 2015
- 학위수여년월 2015. 2
- 학위명 석사
- 학과 및 전공 일반대학원 기계공학과
- 실제URI http://www.dcollection.net/handler/sogang/000000055370
- 본문언어 한국어
- 저작권 서강대학교 논문은 저작권보호를 받습니다.
초록/요약
Various piezoelectric cantilevers are used for energy harvesting system. On energy harvesting, it is important to convert wasted energy such as vibration energy to available energy like electricity. Efficiency of piezoelectric energy harvesting is proportional to amplitude of beam deflection so understanding nonlinearity of the system is important to predict amount of generating energy. When excitation forces are applied to the longitudinal direction of a cantilever, the nonlinear response to the parametric excitation occurs showing hysteresis and jump phenomenon. The nonlinear analysis is performed by simplifying the beam vibration as Duffing’s equation. The amplitude and phase of the parametric resonance and the up- and down-frequencies of jump phenomenon are analytically determined. Experimental results using piezoelectric cantilevers are compared the analytical predictions.
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