摘要
针对传统能量收集装置难以高效收集低频振动能量的问题,利用磁铁之间的相互作用设计了一种磁致式负刚度机构,并将其拓展至摩擦纳米发电,提出一款摆式三稳态摩擦纳米发电机(pendulum-type tristable triboelectric nanogenerator,PT-TENG),用于收集低频振动能量。首先,介绍了PT-TENG的模型设计与工作原理;其次,建立了该发电机的机电耦合模型,利用数值方法研究了该发电机的力学特性和电学性能;然后,分析了系统关键参数对该发电机性能的影响;最后,制备了该发电机的试验样机,进行了验证试验和应用演示试验。结果表明,PT-TENG可以高效地将低频振动能量转化为电能,最高输出功率可达0.27 mW,能够驱动发光二极管阵列。此外,通过选择合理的系统参数可以有效拓宽该发电机低频俘能频带。因此,该研究对低频振动能量收集以及自供电装置设计具有一定指导意义。
Addressing the challenge that the traditional energy harvesting devices can’t efficiently harvest low-frequency vibration energy,this paper utilizes the interaction between magnets to design a magnet-induced negative stiffness mechanism and extends it to the triboelectric nanogenerator,proposing a pendulum-type tristable triboelectric nanogenerator(PT-TENG)for harvesting low-frequency vibration energy.Firstly,the model design and working principle of the PT-TENG were introduced.Secondly,the electromechanical coupling model of the PT-TENG was established.Subsequently,the numerical methods were used to study the mechanical characteristics and electrical performance of the PT-TENG.Furthermore,the effects of key system parameters on the performance of the PT-TENG were analyzed.Finally,a prototype of the PT-TENG was fabricated,and the validation and application demonstration experiments were conducted.The results show that the PT-TENG can efficiently convert low-frequency vibration energy into electrical energy,with a maximum output power of 0.27 mW,capable of driving the light-emitting diode array.Moreover,the low-frequency energy harvesting bandwidth of the PT-TENG can be effectively broadened by selecting appropriate system parameters.Therefore,this paper has guiding significance for low-frequency vibration energy harvesting and the design of self-powered devices.
作者
谭栋国
黄丹丹
欧旭
覃凌云
王凯
周加喜
TAN Dongguo;HUANG Dandan;OU Xu;QIN Lingyun;WANG Kai;ZHOU Jiaxi(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China)
出处
《振动与冲击》
北大核心
2025年第16期29-40,65,共13页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(12302011,12472010)
中国博士后科学基金面上项目(2023M731062)
湖南省基金资助项目(2024JJ4004)。
关键词
低频振动
三稳态
能量收集
非线性动力学
low-frequency vibration
tristable
energy harvesting
nonlinear dynamic
