Qualitative analysis, chaos and coexisting attractors in an asymmetric four-well \(\phi^8\)-generalized Liénard oscillator driven by parametric and external excitations
Authors
Y. J. F. Kpomahou
- Department of Industrial and Technical Sciences, ENSET-Lokossa, UNSTIM-Abomey, Abomey, Benin.
J. A. Adechinan
- Department of Physics, FAST-Natitingou, UNSTIM-Abomey, Abomey, Benin.
J. Edou
- Department of Physics, University of Abomey-Calavi, Abomey-Calabi, Benin.
L. A. Hinvi
- Departement de Genie Mecanique et Productique (GMP), Institut National Superieur de Technologie Industrielle (INSTI), Lokossa/UNSTIM-Abomey, Benin.
Abstract
In this paper, we study the qualitative dynamical analysis, routes to chaos and the coexistence of attractors in a four-well \(\phi^8\)-generalized Liénard oscillator under external and parametric excitations. The local analysis of the autonomous system reveals saddles, nodes, spirals or centers for appropriate choice of stiffness and damping coefficients. The existence of a Hopf bifurcation is proved during the stability analysis of the equilibrium points. The routes to chaos and the prediction of coexisting attractors have been investigated numerically by using the fourth order Runge-Kutta algorithm. The bifurcation structures obtained show that the system displays a rich variety of bifurcation phenomena, such as symmetry breaking, symmetry restoring, period-doubling, period windows, period-m bubbles, reverse period windows, antimonotonicity, intermittency, quasiperiodic, and chaos. In addition, remerging chaotic band attractors and remarkable routes to chaos occur in the system. Further, it is found that the system presents various coexistence of two attractors as well as the monostability and bistability phenomena. On the other hand, for large amplitude of the parametric excitation and with \(\omega = 1\), the coexistence of asymmetric periodic bursting oscillations of different topologies takes place in the system. It has also been shown numerically that for appropriate values of system parameters and initial conditions, the presented system can exhibit up to five types of coexisting multiple attractors.
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ISRP Style
Y. J. F. Kpomahou, J. A. Adechinan, J. Edou, L. A. Hinvi, Qualitative analysis, chaos and coexisting attractors in an asymmetric four-well \(\phi^8\)-generalized Liénard oscillator driven by parametric and external excitations, Journal of Nonlinear Sciences and Applications, 15 (2022), no. 3, 240--252
AMA Style
Kpomahou Y. J. F., Adechinan J. A., Edou J., Hinvi L. A., Qualitative analysis, chaos and coexisting attractors in an asymmetric four-well \(\phi^8\)-generalized Liénard oscillator driven by parametric and external excitations. J. Nonlinear Sci. Appl. (2022); 15(3):240--252
Chicago/Turabian Style
Kpomahou, Y. J. F., Adechinan, J. A., Edou, J., Hinvi, L. A.. "Qualitative analysis, chaos and coexisting attractors in an asymmetric four-well \(\phi^8\)-generalized Liénard oscillator driven by parametric and external excitations." Journal of Nonlinear Sciences and Applications, 15, no. 3 (2022): 240--252
Keywords
- Generalized Liénard oscillator
- four well potential
- parametric excitation
- local stability
- coexisting attractors
MSC
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