Details

Autor(en) / Beteiligte

• Leng, Y. G.
• Gao, Y. J.
• Tan, D.
• Fan, S. B.
• Lai, Z. H.

Titel

An elastic-support model for enhanced bistable piezoelectric energy harvesting from random vibrations

Ist Teil von

• Journal of applied physics, 2015-02, Vol.117 (6)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2015

Quelle

美国小型学会期刊集（AIP Scitation平台）

Beschreibungen/Notizen

• To overcome the defect of conventional nonlinear piezoelectric cantilever vibration energy harvesters, in this paper we conceive an elastic-support model to study the performance of energy converters under two types of variable-intensity excitation conditions: filtered Gaussian noises and pink noises. When excitation intensity is insufficient, thanks to the system's variable potential function, frequent bistable transition oscillations between two wells occur in elastic-support systems, while only weak oscillations in either well could be observed in rigid-support systems. In practical applications, the structural parameters of energy harvesters are not allowed to make real-time changes. If considered remaining the magnet interval and the spring's elastic stiffness unchanged while receiving stable maximum output voltage, elastic-support systems can be made full use toward variable-intensity filtered Gaussian noises. It has been proven that elastic-support systems are capable of adapting to random excitations with variable intensity, through which maximum power output and sufficient electromechanical energy conversion of the system can be accomplished.