Design of a Bézier-Profile Plate for Closely Spaced Multimodal Vibration Energy Harvesting

Hai-Dang Nguyen and Dung-An Wang
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Hai-Dang Nguyen: Automotive Safety Services, IAT Engineering Services Co., Ltd., 82 Ung Van Khiem, Ward 25, Binh Thanh District, Ho Chi Minh City 700000, Vietnam
Dung-An Wang: Graduate Institute of Precision Engineering, National Chung Hsing University, 250 Kuo Kuang Rd., Taichung 40227, Taiwan

Energies, 2021, vol. 14, issue 16, 1-18

Abstract: A cubic Bézier-profile plate for multimodal vibration energy harvesting was developed. The design of the plate was based on an optimization procedure in which the profile of the plate was optimized via the parameters of a cubic Bézier curve to meet the requirements. The multimodal energy harvesting of the plate exploited its first bending mode and its first twisting mode. The conversion of vibration energy into electrical energy was by electromagnetic induction with a magnet attached to a corner of the plate. These two closely spaced vibration modes achieved the multi-modal energy harvesting of the device. Prototypes of the device were manufactured using a numerical-control machining process. The experimental results were in good agreement with the design specifications. With the same base lengths, height, and thickness, the maximum von Mises stress of the proposed plate was much lower due to its bell-shaped profile. The cubic Bézier curve chosen for the plate profile was effective for design of the closely-spaced multimodal vibration energy harvester. With the flexibility of its controllable parametric curve, a high design freedom of the energy harvester with specified frequency ratios could be achieved.

Keywords: multimodal; energy harvesting; Bézier curve (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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