DECAT - Departamento de Controle e Automação

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/490

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2009 - 20102

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Assunto: search.filters.subject.Electronic analogy

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    An inductor-free realization of the Chua’s circuit based on electronic analogy.
    (2009) Rocha, Ronilson; Torricos, Rene Orlando Medrano
    Although literature presents several alternatives, an approach based on the electronic analogy was still not considered for the implementation of an inductor-free realization of the double scroll Chua’s circuit. This paper presents a new inductor-free configuration of the Chua’s circuit based on the electronic analogy. This proposal results in a versatile and functional inductorless implementation of the Chua’s circuit that offers new and interesting features for several applications. The analogous circuit is implemented and used to perform an experimental mapping of a large variety of attractors.
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    Experimental characterization of nonlinear systems : a real-time evaluation of the analogous Chua’s circuit behavior.
    (2010) Rocha, Ronilson; Andrucioli, Guilherme Lucio Damião; Torricos, Rene Orlando Medrano
    This paper presents an experimental characterization of the behavior of an analogous version of the Chua’s circuit. The electronic circuit signals are captured using a data acquisition board (DAQ) and processed using LabVIEW environment. The following aspects of the time series analysis are analyzed: time waveforms, phase portraits, frequency spectra, Poincaré sections, and bifurcation diagram. The circuit behavior is experimentally mapped with the parameter variations, where are identified equilibrium points, periodic and chaotic attractors, and bifurcations. These analysis techniques are performed in real-time and can be applied to characterize, with precision, several nonlinear systems.