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Energy harvesting through pendulum motion and DC generators

2019; Brazilian Society of Mechanical Sciences and Engineering; Volume: 16; Issue: 1 Linguagem: Inglês

10.1590/1679-78255013

1679-7825

Rafael Henrique Avanço, Ângelo Marcelo Tusset, Marcelo Suetake, Hélio Aparecido Navarro, José Manoel Balthazar, Airton Nabarrete,

Wave and Wind Energy Systems

In this paper a mathematical model was found, and numerical results obtained for the pendulum behavior when coupled to a DC generator. A simple pendulum is vertically excited on its support and consequently exhibiting oscillations and rotations. The motion of the pendulum spins the axis of a DC generator and inducing a current. The dynamic model involving the generator and the pendulum dynamics is developed and analyzed in this article. Bifurcation diagrams demonstrate doubling-period and saddle-node bifurcations with the chaos. The presence of chaos is verified by the Lyapunov exponents applied on the time series of the pendulum speed and position. Nonideal interactions of a DC motor with a pendulum by a crank-shaft-slider mechanism is analyzed and compared with an ideal excitation of the pendulum.