This paper investigates the possibility of energy generation via pendulum rotations when the source of vertical excitation is chaotic in nature. The investigations are conducted using an additional height-adjustable mechanism housing a secondary spring to optimize a configuration of experimental pendulum setup. Chaotic oscillations of the pendulum pivot are made possible at certain excitation conditions due to a piecewise-linear stiffness characteristic introduced by the modification. A velocity control method is applied to maintain the rotational motion of the pendulum as it interacts with the vertical oscillator. The control input is affected by a motor, and a generator is used to quantify the energy extraction. The experimental results imply the feasibility of employing a pendulum device in a chaotic vibratory environment for energy harvesting purpose.
Rotations of Pendulum When Its Pivot Oscillates Chaotically
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received December 23, 2016; final manuscript received July 29, 2017; published online October 9, 2017. Assoc. Editor: Mohammad Younis.
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Teh, S., Woo, K., and Demrdash, H. (October 9, 2017). "Rotations of Pendulum When Its Pivot Oscillates Chaotically." ASME. J. Comput. Nonlinear Dynam. January 2018; 13(1): 011006. https://doi.org/10.1115/1.4037595
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