Dynamically synergistic regulation mechanism for rotation energy harvesting

Abstract

To realize the sustainable energy supply of wireless sensor networks, a novel dynamically synergistic regulation mechanism is proposed for rotation energy harvesting under the guidance of the dynamic regulation evolution. The connotation of synergyincludes: (1) Nonlinear magnetic force and variable stiffness (centrifugal stiffening effect and penalty stiffness of adaptive-anastomotic barricades) synergistically regulate the dynamic behavior of the system; (2) The adaptive-anastomotic barricadesalso convertmechanical energy into electrical energy when regulating the dynamic behavior of the system, i.e., the triboelectric nanogeneratorsynergistically generateselectricity with piezoelectric energy harvesterin different states (collision and vibration) of the system, respectively.Based on the energy method of Hamiltonian principle, the electromechanical coupling dynamic model of the system is developed. The parameters analysis is performed for the discussion of dynamic characteristics and electrical performance of the system in a wide rotation speed range. The prototype is fabricated and the experiments under different conditions are carried out. The experimental data are in good agreement with the simulation results, which verifies the effectiveness of the theoretical model. The experimental results show that the proposed harvester can harvest energy effectively in a wide speed range of 0–1000 r/min. The peak-peak voltage and the average power for PEH and TENG can reach 122.1 V, 1600 μW; 774.3 V, 205.1 μW, respectively. The proposed dynamically synergistic regulation mechanism provides a new perspective to improve the comprehensive performance of the rotation energy harvester, which exhibits a promising application prospect in the self-powered IoT applications.