Vibration energy harvesting for low frequency using auto-tuning parametric rolling pendulum under exogenous multi-frequency excitations  

作　　者：Surat Punyakaew Manukid Parnichkun 

机构地区：[1]School of Engineering and Technology,Asian Institute of Technology,Thailand

出　　处：《Theoretical & Applied Mechanics Letters》2020年第6期448-455,共8页力学快报（英文版）

摘　　要：An electromagnetic parametrically excited rolling pendulum energy harvester with self-tuning mechanisms subject to multi-frequency excitation is proposed and investigated in this paper.The system consists of two uncoupled rolling pendulum.The resonance frequency of each the rolling pendulum can be automatically tuned by adjusting its geometric parameters to access parametric resonance.This harvester can be used to harvest the energy at low frequency.A prototype is developed and evaluated.Its mathematical model is derived.A cam with rolling follower mechanism is employed to generate multi-frequency excitation.An experimental study is conducted to validate the proposed concept.The experimental results are confirmed by the numerical results.The harvester is successfully tuned when the angular velocity of the cam is changed from 1.149 to 1.236 Hz.

关 键 词：Energy harvesting Auto-tuning harvester Parametric rolling pendulum Multi-frequency vibration Low operating frequency 

分 类 号：TB53[理学—物理]