Improved piezoelectric energy harvester with dual-impact strategy for small acceleration amplitude vibrations

被引:0
|
作者
Liu, Jun [1 ]
Sun, Yi [1 ,2 ]
Ding, Jiheng [1 ,2 ]
Luo, Jun [3 ]
Pu, Huayan [1 ,2 ,3 ]
Wang, Min [1 ,2 ]
机构
[1] Shanghai Univ, Sch Mechatron Engn & Automat, Shanghai 200444, Peoples R China
[2] Minist Educ, Engn Res Ctr Unmanned Intelligent Marine Equipment, 99 Shangda Rd, Shanghai 200444, Peoples R China
[3] Chongqing Univ, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China
基金
中国国家自然科学基金;
关键词
FREQUENCY UP-CONVERSION; INTERNAL RESONANCE; BROAD-BAND; DESIGN;
D O I
10.1063/5.0228947
中图分类号
O59 [应用物理学];
学科分类号
摘要
Increasing the operable frequency range and improving the small acceleration amplitude harvesting performance of the piezoelectric energy harvesting devices is importance due to the wide frequency spectrum and large amplitude range of environmental vibrations. In this Letter, an improved piezoelectric energy harvester with frequency upconversion is proposed, which is comprised of a composite piezoelectric beam and a firing pin. In contrast to the conventional impact-based systems that mainly rely on beam vibrations to enhance harvesting performance, the proposed system employs a dual-impact strategy. In particular, an oblique impact-based harvesting phenomenon is observed, which has not been investigated in previous studies. A multilevel impact nonlinear coupled dynamic model is developed. The experimental results indicate that at an excitation acceleration amplitude of 0.15 g, the proposed system demonstrates a 482.9% increase in the output peak value and introduces dual-band frequency in comparison with the conventional structure. Additionally, the proposed coupled model is validated through adjustments to various load resistances. The highest output power is achieved at a load resistance of 210 k Omega, with the maximum average power reaching 3.96 mW and a power density of 1.59 mW/mm(3)g(2) at an acceleration amplitude of 0.15 g, outperforming other piezoelectric energy harvesters.
引用
收藏
页数:7
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