Abstract:
An efficient, eco-friendly energy generation approach has increased the potential development
of harvesting wind energy via a piezoelectric transduction mechanism, which can be a feasible
replacement for conventional batteries in low-powered, portable, and wireless appliances and
gadgets. Different phenomena harvest vibrational energy using wind, such as vortex-induced
vibrations (VIV), wakegalloping, galloping, and flutter. These are dependent upon the form of
the bluff body to be employed. Magnetic force enhances the performance of the energy harvester
by non-linearity in the system as it will switch between mono-stable regions and bi-stable regions
due to non-linear magnetic force; hence, there is a need to study this aspect. In this study, we
compare the mono-stable variant and bi-stable variant of the piezo-aeroelastic energy harvester.
The addition of base excitation to the system allows for additional research. Buckling is
influenced by the non-linear force induced by a pair of magnets, which varies with their distance
from one another. The efficiency analysis of both mono-stable regions and bi-stable regions is
carried out on the magnetic separation at the equivalent coupled frequency for an accurate and
effective comparison. The Euler-Lagrange technique has been used to develop a lumped
parameter model. Non-linear magnetic force is shown in the equation by dipole dipole
representation. The static frequency analysis and coupled frequency analysis are done using the
mathematical model, after which a performance analysis is performed. The performance analysis
is done by simulation using MATLAB. The study shows that bi-stability helps achieve broadband
synchronization regions.
