https://doi.org/10.1140/epjp/s13360-024-05345-2
Regular Article
Nonlinear dynamics of an asymmetric bistable energy harvester with an adjustable unilateral stopper
1
School of Mechanics and Safety Engineering, Zhengzhou University, 450001, Zhengzhou, China
2
Engineering Technology Research Center of Henan Province for MEMS Manufacturing and Application, Zhengzhou University, 450001, Zhengzhou, China
3
School of Aero Engine, Zhengzhou University of Aeronautics, 450046, Zhengzhou, China
4
School of Cyber Science and Engineering & Hanwei Institute of Internet of Things, 450001, Zhengzhou, China
b
w_wei2013@zzu.edu.cn
c
liushuangyan@zua.edu.cn
e
profwei@zzu.edu.cn
Received:
1
April
2024
Accepted:
7
June
2024
Published online:
22
June
2024
Due to the broadband response and high sensitivity to low excitation levels, bistable energy harvesters (BEHs) have been viewed as an efficient method to overcome the shortcomings of linear energy harvesters only performing well near the resonant frequency. Previously, most strategies for performance enhancement of BEHs have been extensively discussed for systems with perfectly symmetric potentials. However, it is difficult to achieve a BEH with a perfectly symmetric potential due to practical constraints and previous investigations indicated that asymmetric potentials have a negative effect on the performance of BEH. Therefore, an adjustable unilateral stopper is introduced and positioned at the side with deeper potential well to broaden the response frequency band. Numerical simulations of bifurcation diagrams and maps of 0–1 test and output power indicate that the introduction of the stopper could enable the asymmetric BEH to realize interwell oscillation in a wider frequency range, and the performance are closely related to the collision gap, collision position, excitation frequency, as well as excitation levels. Regarding the basins of attraction, it is demonstrated that the stopper leads the system to achieve interwell oscillation with a high probability under certain excited conditions. Overall, this study provides a possible strategy for improving the performance of the asymmetric BEHs.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
