2024 Volume 32 Issue 1 Pages 153-158
In this study, we propose a design method to obtain the optimal parameters of the energy storage mechanism depending on the specifications of the magnetostrictive vibration power generation device and the excitation condition using the Differential Evolution (DE). The dynamic model of the device is assumed to be a linear one-degree-of -freedom damped vibration system, and the half wave voltage doubler, consisting of two capacitors and two diodes, is adopted as the energy storage mechanism. The dynamic characteristics of the entire system subjected to the base excitation are mathematically modeled, and the time response is numerically calculated to derive the time required for the system to reach a given amount of power. The values of capacitance that minimizes the time required for energy storage were explored by using DE, and the optimal solution was verified through analyses and experiments. Through this research, it was shown that DE is effective for the optimal design of the energy storage mechanisms. However, the experimental and analytical time response results did not completely match due to several causes, which were further investigated and clarified.
