Open AccessStudies on vibration response and energy harvesting of elastic-supported bistable piezoelectric cantilever beams
Author(s) -
Gao Yu-Ji,
Yonggang Leng,
Fan Sheng-Bo,
Zhonghong Lai
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.090501
Subject(s) - bistability , cantilever , energy harvesting , excitation , vibration , magnet , nonlinear system , oscillation (cell signaling) , intensity (physics) , piezoelectricity , energy (signal processing) , materials science , elastic energy , acoustics , physics , optics , optoelectronics , quantum mechanics , biology , composite material , genetics
Based on the results of study on conventional rigid support nonlinear energy harvesters, in this paper, we conceive a kind of structure with an elastic-supported external magnet, for keeping the system in a state of bistable oscillation due to low-intensity excitations. Thus, an efficient electromechanical energy conversion can be accomplished. Studies show that the elastic-supported nonlinear energy harvesting systems do not need real-time adjustment of magnet spacings to meet varying-intensity random excitation vibrations. This structure helps to better satisfy the variable-intensity random excitation source, consequently it achieves efficiently electromechanical energy conversion.