Design and experimental investigation of magnetically coupling piezoelectric energy harvesting system based on galloping and vortex induced vibration

AbstractAbstractThis paper presents a magnetic coupling piezoelectric energy harvester based on galloping and vortex-induced vibration to scavenge low-speed wind. The influence of magnet spacing on the piezoelectric energy harvester is analyzed by using a mathematical model. The power generation performance of the energy harvester is explored by changing the magnet spacing. The experimental results show that the distance is negative related to the onset wind speed. Vortex induced vibration still make the system have voltage output. The output power can be effectively improved by increasing the magnet spacing while the magnetic force beyond a certain range can be ignored.Keywords: Gallopingvortex induced vibrationmagnetic couplingpiezoelectric energy harvester Additional informationFundingThis work was supported by the National Natural Science Foundation of China (51705296, 52075305, 52075306), Shandong Provincial Natural Science Foundation Project (Nos. ZR2021ME160, ZR2022ME053), Shandong Provincial Key Laboratory of Precision Manufacturing and Nontraditional Machining, the Shandong Province Science Technology SMEs Innovation Capacity Improvement Project (Nos. 2022TSGC1164), and The Youth Innovation Team Development Program of Shandong Provincial Higher Education Institutions (Grant No. 2022KJ234).