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• W3195710018 endingPage "117577" @default.
• W3195710018 startingPage "117577" @default.
• W3195710018 abstract "Currently, the practicability of vibration energy harvesting devices is restricted by narrow resonant bandwidths. To realize broadband, high-efficiency vibration energy harvesting, here we propose a flute-inspired mechanical-intelligent piezoelectric energy harvester to achieve self-tracking vibration frequency without manual interventions. This harvester adjusts its natural frequency in a way reminiscent of how the tone of a flute is altered (i.e., by moving a sliding mass on the longitudinal arranged hole of a cantilever beam). The mechanical intelligence is reflected in self-tuning and self-locking following its dynamic responses. The natural frequency of the proposed device approaches the external excitation frequency by self-tuning, and the resonant state is stably maintained by self-locking. Comparison experiments with its linear counterpart, this flute-inspired mechanical-intelligent vibration energy harvester demonstrates a significant improvement of 610% in working bandwidth and an increase in power of 348%. Compared with the tunable beam-slider structure without mechanical-intelligence, the proposed energy harvester shows 235% increasing in operating bandwidth and 659% increasing in working efficiency. Practical applications of powering an electronic clock and charging a capacitor show the feasibility of this energy harvester used for the engineering community. This study provides a mechanical-intelligent design approach for piezoelectric vibration energy harvester, which may also be applied to other vibration energy harvesters using electromagnetic, triboelectric or hybrid transductions. • This flute-inspired device realizes broadband vibration energy harvesting. • This harvester possesses both self-tuning and self-locking abilities. • Self-tuning widens bandwidth and self-locking enhances performance. • The superiority of mechanical-intelligent is verified by various vibration forms. • Mechanical-intelligent design enhances 659% power and widens 610% bandwidth." @default.
• W3195710018 created "2021-08-30" @default.
• W3195710018 creator A5038393555 @default.
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• W3195710018 date "2021-12-01" @default.
• W3195710018 modified "2023-10-11" @default.
• W3195710018 title "A flute-inspired broadband piezoelectric vibration energy harvesting device with mechanical intelligent design" @default.
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• W3195710018 doi "https://doi.org/10.1016/j.apenergy.2021.117577" @default.
• W3195710018 hasPublicationYear "2021" @default.
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