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The growth of the IoT infrastructure requires the development of new devices able to harvest energy from the environment to power Wireless Sensor Network (WSN) nodes. Among the available sources (light, mechanical vibrations, temperature differences...), air flow can represent a good choice in many cases: we consider not only a natural wind, but also air flow in building pipelines or air flow around...
Flapping states of an energy harvesting device have been investigated by means of experiments, numerical simulations and a phenomenological model. The main aim is to predict the geometrical/physical properties of the system allowing sustained flapping limit cycles to emerge. These latter regimes are interesting when the system is used to harvest energy from flows. The main argument to identify flapping...
Significant efforts are being devoted in order to develop efficient and reliable energy harvesters based on interactions between structures and environmental fluid flows such as wind or marine currents. In this framework, a fully-passive energy harvester of centimetric size employing an elastically bounded wing has been developed. The system exploits the coupled-mode flutter, leading in certain conditions...
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