A previous pilot study proposed a novel airfoil-based stall-flutter energy harvester equipped with an electromagnetic induction converter for wind energy harvesting. While the feasibility of the device was demonstrated, its efficiency under optimized electromagnetic circuitry and the combined effects of structural nonlinearity and turbulent wind inflow remains largely unexplored. To address these gaps, this study advances the information processing, necessary to optimize the previous design. In particular, the electromagnetic converter is optimized using a surrogate-based global optimization approach employing radial-basis-function stochastic response surface models, yielding up to a 503% increase in average electrical output power compared to the non-optimal circuit used in earlier work. The effects of structural nonlinearity and turbulent inflow are also examined. For the open-circuit configuration, turbulence is found to have a secondary influence on the harvester response, confirming previous wind tunnel observations. For the closed-circuit configuration, turbulence across different intensities similarly produces only modest changes in output energy. By contrast, structural nonlinearities, theoretically modeled using hybrid Duffing-van der Pol oscillators, have a beneficial impact, enhancing performance by nearly an order of magnitude. With the optimal electromagnetic circuit and appropriately tuned structural nonlinear parameters, the harvester achieves a maximum average output power of 64.32 mW for simulated operational conditions at a representative deployment site. These findings demonstrate feasibility of this compact harvester and highlight the critical role of electromagnetic and structural optimization in maximizing energy generation, offering guidance for future prototype and field deployment.
La et al. (Fri,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: