Enhanced galloping energy harvester with cooperative mode of vibration and collision

Abstract The low power and narrow speed range remain bottlenecks that constrain the application of small-scale wind energy harvesting. This paper proposes a simple, low-cost, reliable method to address these critical issues. A galloping harvester with cooperative mode vibration collision (GEH-VC) is presented. pair curved boundaries attached functional materials are introduced, which not only improve performance harvesting system, but also convert more mechanical into electrical during collision. beam deforms piezoelectric (PEH) generates electricity flow-induced vibration. In addition, contacts separates from boundaries, triboelectric nanogenerator (TENG) order reduce influence on aerodynamic feasibility increasing working area TENG, vertical structure designed. When high, maintain stable amplitude system increase frequency thereby avoiding damage sheet improving electromechanical conversion efficiency, TENG works PEH generate electricity. Since can protect at high speeds, its stiffness be designed start speeds. coupling dynamic model established according GEH-VC operating principle verified experimentally. results show has wide average increased by 180% compared traditional PEH. prototype demonstrated commercial temperature sensor. study provides novel perspective design hybrid mechanisms, is, combine collaborate based their respective characteristics.