Nonlinear dynamics of asymmetric bistable energy harvesters

The paper investigates asymmetries effects over a nonlinear vibration energy harvester dynamics. The asymmetric system performance is compared with symmetric ones. Different asymmetry levels on restoring force and gravity action are investigated from a system-sloping angle variation. Bifurcation dia...

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Bibliographic Details
Published in:International journal of mechanical sciences 2023-11, Vol.257, p.108542, Article 108542
Main Authors: Norenberg, João Pedro, Luo, Roberto, Lopes, Vinicius Gonçalves, Peterson, João Victor L.L., Cunha, Americo
Format: Article
Language:English
Subjects:
Asymmetric oscillator
Basins of attraction
Bifurcation diagrams
Chaotic Dynamics
Energy harvesting
Engineering Sciences
Mathematics
Mechanical engineering
Mechanics
Nonlinear dynamics
Nonlinear Sciences
Solid mechanics
Statistics
Vibrations
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Summary:The paper investigates asymmetries effects over a nonlinear vibration energy harvester dynamics. The asymmetric system performance is compared with symmetric ones. Different asymmetry levels on restoring force and gravity action are investigated from a system-sloping angle variation. Bifurcation diagrams and basins of attraction are used to examine the local and global characteristics underlying dynamical systems under different excitation energy. The results show the adverse effects of asymmetries on system dynamics. They also reveal ways to overcome them by canceling asymmetric influence from optimal sloping angle values and improving asymmetric system performance over symmetrical ones. This comprehensive numerical study provides novel valuable insights into asymmetrical energy harvester dynamics, a wide and still less explored topic. [Display omitted] •Dynamic analysis of an asymmetric bistable energy harvesters.•Investigation of asymmetry effects on the dynamical system behavior.•Novel method for basins of attraction calculation based on a 0–1 test for chaos.•Similar behavior in an optimal asymmetric vs symmetric configuration demonstrated.
ISSN:0020-7403
1879-2162
DOI:10.1016/j.ijmecsci.2023.108542