®®®® SIIA Público

Título del libro: Nonlinear Systems: Design, Applications And Analysis
Título del capítulo: Lyapunov exponents and parameter planes of hyperchaotic regions of the Lü model in 6D and its projections

Autores UNAM:
LUIS ALBERTO QUEZADA TELLEZ; OSCAR ALFONSO ROSAS JAIMES; GUILLERMO FERNANDEZ ANAYA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2017
Palabras clave:

Chaos theory; Differential equations; Eigenvalues and eigenfunctions; Jacobian matrices; Lyapunov functions; Autonomous differential equation; Dimensional systems; Dynamic behaviors; Equilibrium point; Initial conditions; Parametric planes; Real and imaginary; Two dimensional plane; Lyapunov methods


Resumen:

In this chapter, we analyze the dynamic behavior of an extended Lü system in six dimensions. The extended Lü system is obtained by replacing real complex variables in the original Lü system in three dimensions. From this substitution, we obtain a new real system made up of six non-linear autonomous differential equations for the real and imaginary part variables. We analyze the local dynamics of the proposed Lü extended system, which results in its equilibrium points being hyperbolic and evaluating them into the Jacobian matrix we obtain eigenvalues corresponding to saddle-focus. A similar analysis is developed for projections of the extended system in five and four dimensions. Projections of one and two dimensions lower than the extended six-dimensional system are obtained by making null one or two of their imaginary part variables. We have carried out the respective analyses of local stability for these projections in five and four dimensions. On the other hand, the Lyapunov exponents are also calculated under different initial conditions for each of these systems. These Lyapunov exponents allow us to construct the parametric planes to determine the hyperchaotic, chaotic or periodic regions of the analyzed systems. The method considers Lyapunov's third largest exponent to construct colored plots in a two-dimensional plane. This procedure is used for the extended Lü system as well as for its projections in five and four dimensions. © 2017 by Nova Science Publishers, Inc.


Entidades citadas de la UNAM: