光学精密工程2025，Vol.33Issue(18)：2899-2913,15.DOI:10.37188/OPE.20253318.2899
力放大式三自由度压电俘能器的设计建模与实验研究
Design,modeling and experimental research on force amplification type three-degree-of-freedom piezoelectric energy harvester
摘要
Abstract
To improve the energy conversion efficiency of a single-degree-of-freedom(SDOF)piezoelec-tric energy harvester and broaden its operational direction,a novel three-degree-of-freedom(3-DOF)piezoelectric energy harvester had been designed by integrating the piezoelectric energy conversion mecha-nism,multi-degree-of-freedom piezoelectric harvesting principles,and force amplification structures.The proposed harvester had consisted of orthogonally arranged cantilever-beam harvesters and a force-amplified compression-tension mode harvester.A simulation model had been established using MATLAB/Simulink to analyze the effects of excitation and structural parameters on the system's dynamic response.Based on the simulation,a prototype had been fabricated and experimentally validated.The results had demonstrat-ed that the harvester could effectively generate electrical energy along the X,Y,and Z directions,with structural parameters(cantilever spacing,proof mass,and spring stiffness)significantly influencing its per-formance.Experiments showed that the X and Y directions achieved an output power of 2.924 mW at a load resistance of 15 kΩ,capable of illuminating 22 LEDs,while the Z direction delivered 4.871 mW at 40 kΩ,powering 33 LEDs.The findings confirm the harvester's stable energy output across different vi-bration directions,demonstrating its feasibility for powering low-power wireless sensors.This study pro-vides theoretical guidance for the design of novel multi-degree-of-freedom piezoelectric energy harvesters.关键词
三自由度/振动能量收集/力放大结构/正压电效应/拉压模式Key words
three degrees of freedom/vibration energy collection/force amplification structure/positive piezoelectric effect/tension-compression mode分类
电子信息工程引用本文复制引用
徐冬梅,杨阳,于思淼,张驰,潘家楠,张旭辉..力放大式三自由度压电俘能器的设计建模与实验研究[J].光学精密工程,2025,33(18):2899-2913,15.基金项目
国家自然科学基金(No.62303370,No.52005398) （No.62303370,No.52005398）
陕西省自然科学基金研究计划(No.2025JC-YBMS-586) （No.2025JC-YBMS-586）
中国博士后科学基金面上项目(No.2024M762449) （No.2024M762449）
陕西省教育厅服务地方专项项目(No.24JC055) （No.24JC055）
安徽省博士后研究人员科研项目(No.2023B753) （No.2023B753）
