论文标题
用于宽带和高能力压电能量收获的分级超材料
A Graded Metamaterial for Broadband and High-capability Piezoelectric Energy Harvesting
论文作者
论文摘要
这项工作研究了宽带分级的超材料，该宽带分级成立于靶向低频结构振动的压电能量收集功能，位于100 Hz以下。该设备将分级的超材料与光束样的谐振器，压电贴片和自动压电接口电路结合在一起，以进行能量收集。基于机械和电总数参数，提出了一个集成模型来研究所提出的设计的功率性能。进行了彻底的数值模拟，以分析空间频率分离能力和分级超材料的慢波现象，用于宽带和高能力的压电能量收获。具有现实振动源的实验表明，基于单个悬臂收割机的常规收获溶液，所提出的设计的收获能力增加了五倍。我们的结果揭示了剥削分级超材料对节能振动驱动器件的显着潜力。
This work studies a broadband graded metamaterial, which integrates the piezoelectric energy harvesting function targeting low-frequency structural vibrations, lying below 100 Hz. The device combines a graded metamaterial with beam-like resonators, piezoelectric patches and a self-powered piezoelectric interface circuit for energy harvesting. Based on the mechanical and electrical lumped parameters, an integrated model is proposed to investigate the power performance of the proposed design. Thorough numerical simulations were conducted to analyse the spatial frequency separation capacity and the slow-wave phenomenon of the graded metamaterial for broadband and high-capability piezoelectric energy harvesting. Experiments with realistic vibration sources show that the harvested power of the proposed design yields a five-fold increase with respect to conventional harvesting solutions based on single cantilever harvesters. Our results reveal the significant potential on exploitation of graded metamaterials for energy-efficient vibration-powered devices.
