Nowdays, harvested [5]. Theoretically, in mechanical vibrations, a system

Nowdays, fossil fuels are limited in supply and depend on geologic
evolution. Fossil fuel reserve lifetimes may be extended by new technologies
for extraction, but the need to minimize the damaging effects of climate change
is a more immediate problem than fossil fuel depletion. If the worst impacts of
rising temperatures and climate alteration are to be avoided, society needs to
switch to renewable energy sources while much fossil carbon is still safely
buried in the earth’s crust. Many sources of clean energy can found in many
location in the worlds, such as ocean and river for water turbine, sun light
for photovoltaic and solar concentrator, wind energy for wind turbine. All  power energy above need expensive and
complexity in installation. Energy based on vibration criteria is one of
solutions in simplify and cheaper installation.

The utilization of structure vibration is used for capturing
energy from vibration environment is a solution to increase the energy source
in the rural area. Among different approach to collect vibration from component
moving to power energy,such as vibration from rotary equipment 12, railroad application 3 and structural health monitoring 4. The most popular research about
vibration energy harvesting is piezoelectric with environments component. 

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Piezoelectric research is mostly done to increase the power output of a
particular vibration source. Improper piezo design will cause low the
efficiency of the energy harvested 5. Theoretically, in mechanical vibrations, a system that resonates at a
frequency that coincides with the natural frequency of the system will produce
maximum electrical power. One thing that needs to be proved in this paper is
the opinion from Liu that results in a solution that the output power will drop
when the excitation frequency shifts away from the natural frequency of the
mechanical system6. Many studies use adaptive adjustments to conform to the natural
frequency of the piezo system, as did by Clark using the shunt method to adjust
the resonator frequency of the piezo system 7. The study also studied in this paper is the evaluation of structural
responses, in this case, is the material and geometry functions of the
cantilever beam to external excitation functions, some studies also do the same
regarding checking the diversity of materials and geometry associated with the
excitation function with statistical approach89.

Typically modeling
in piezoelectric for energy harvesting used the simplification of single degree
of freedom (SDOF)10. SDOF modeling done in this paper using Finite Element
Method (FEM) approach. Initial modeling will illustrate the characteristics of
the cantilever beam used, such as the vibration mode occurring in some natural
frequencies of the cantilever beam system. In this study present distributed
parameter solution from cantilever beam with a connection to piezoelectric. The
steady state voltage response is measured in such a way that measurements of the
vibration mode predicted by the finite element method (FEM) using ANSYS
software. Validation through experiment aims to know the role of vibration mode
at the natural frequency of the system against the amount of voltage generated.