  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.
