Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Analysis of the dynamics and energy efficiency of a nonideal portal frame structural support system coupled to a passive absorber
Submission Author:
Angelo Marcelo Tusset , PR
Co-Authors:
Angelo Marcelo Tusset, José Manoel Balthazar
Presenter: Angelo Marcelo Tusset
doi://10.26678/ABCM.COBEM2023.COB2023-2248
Abstract
Recently, there has been much interest in the concepts of electro-mechanical systems that are able to scavenge, or harvest energy from their operating environment. As the kinetic energy is a source of energy easily found in the environment, devices that converts kinetic energy into electrical energy have been widely studied, and special attention has been devoted to devices that use piezoelectric elements as a means of energy transduction. Research about non-ideal problems also have been increased considerably in technical-scientific community. Nonlinear problems have been widely studied due to their particularities in real problems, mainly when these nonlinearities induce interactions between a dynamical system with its excitation source, these kinds of systems are called non-ideal systems. One of the excitation sources, which is of non-ideal kind, is an unbalanced DC motor with limited power supply. In this work, a dynamic analysis of an energy collector model is presented, based on a simple gantry structure, considered a non-ideal excitation system, and the coupling of an NES system as a source of energy absorption. Energy harvesting is performed using piezoelectric material coupled to the gantry structure. The dynamic analysis of the system is performed considering, time history, phase diagrams, and the 0-1 test. Numerical simulations, considering variation of the coupling parameters of the piezoelectric material and the NES absorber are presented. The simulation results demonstrate that for certain system parameters, chaotic, quasi-periodic and periodic behavior is observed. Variations of the average energy harvesting power for parametric variations are also observed. With the obtained results it was possible to demonstrate that the use of the passive absorber makes it possible to suppress the chaotic behavior of the system, as well as to increase the energy generation, being only necessary to adjust the mass, rigidity and damping of the absorber.
Keywords
energy harvesting, Chaos Suppression, non ideal DC motor, non-linear dynamics
