Pertin Osor, Guha Koushik, Jakšić Olga, Jakšić Zoran, Iannacci Jacopo
National MEMS Design Centre, Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, Assam 788010, India.
Center of Microelectronic Technologies, Institute of Chemistry, Technology, and Metallurgy-National Institute of the Republic of Serbia, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia.
Micromachines (Basel). 2022 Aug 26;13(9):1399. doi: 10.3390/mi13091399.
This paper proposes a monostable nonlinear Piezoelectric Energy Harvester (PEH). The harvester is based on an unconventional exsect-tapered fixed-guided spring design, which introduces nonlinearity into the system due to the bending and stretching of the spring. The physical-mathematical model and finite element simulations were performed to analyze the effects of the stretching-induced nonlinearity on the performance of the energy harvester. The proposed exsect-tapered nonlinear PEH shows a bandwidth and power enhancement of 15.38 and 44.4%, respectively, compared to conventional rectangular nonlinear PEHs. It shows a bandwidth and power enhancement of 11.11 and 26.83%, respectively, compared to a simple, linearly tapered and nonlinear PEH. The exsect-tapered nonlinear PEH improves the power output and operational bandwidth for harvesting low-frequency ambient vibrations.
本文提出了一种单稳态非线性压电能量采集器（PEH）。该采集器基于一种非常规的切除锥形固定导向弹簧设计，由于弹簧的弯曲和拉伸，该设计将非线性引入系统。进行了物理数学模型和有限元模拟，以分析拉伸引起的非线性对能量采集器性能的影响。与传统的矩形非线性PEH相比，所提出的切除锥形非线性PEH的带宽和功率分别提高了15.38%和44.4%。与简单的线性锥形非线性PEH相比，其带宽和功率分别提高了11.11%和26.83%。切除锥形非线性PEH提高了用于收集低频环境振动的功率输出和工作带宽。
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