Nonlinear dynamics and control strategies: On a energy harvester vibrating system with a linear form to non-ideal motor torque

• Autor(a) principal: Iliuk, I. [UNESP]
• Data de Publicação: 2012
• Outros Autores: Balthazar, J. M. [UNESP], Tusset, A. M., Felix, J. L. P., Pontes, B. R. de [UNESP]
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1051/matecconf/20120108003; http://hdl.handle.net/11449/116874

In this paper, we deal with the research of a vibrating model of an energy harvester device, including the nonlinearities in the model of the piezoelectric coupling and the non-ideal excitation. We show, using numerical simulations, in the analysis of the dynamic responses, that the harvested power is influenced by non-linear vibrations of the structure. Chaotic behavior was also observed, causing of the loss of energy throughout the simulation time. Using a perturbation technique, we find an approximate analytical solution for the non-ideal system. Then, we apply both two control techniques, to keep the considered system, into a stable condition. Both the State Dependent Ricatti Equation (SDRE) control as the feedback control by changing the energy of the oscillator, were efficient in controlling of the considered non-ideal system.