Abstract
In this work we introduce a square chaotic attractor based on the collision of two heteroclinic orbits. Before the collision, the system presents the coexistence of two double scroll attractors that are generated via piecewise linear (PWL) systems that deal with two saddle-foci equilibria of different classes, i.e. the dimensions of the unstable and stable manifolds of one of the equilibrium points are one and two, respectively, and vice versa for the unstable and stable manifolds associated with the second equilibrium point. The new class is constructed based on the existence of a heteroclinic loop by linear affine systems with two saddle-focus equilibrium points of different types. The chaotic behavior of the proposed system is tested by the maximum Lyapunov exponent and the 0–1 chaos test. This new class of PWL dynamical systems exhibits different behaviors and allows the generation of different basins of attraction for the coexistence of two or more attractors. Therefore, a mechanism to establish bistability is provided and how it can be controlled (i.e. bistability annihilation) via varying system’s parameters is demonstrated.
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Gilardi-Velázquez, H.E., Escalante-González, R.J. & Campos, E. Emergence of a square chaotic attractor through the collision of heteroclinic orbits. Eur. Phys. J. Spec. Top. 229, 1351–1360 (2020). https://doi.org/10.1140/epjst/e2020-900219-4
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DOI: https://doi.org/10.1140/epjst/e2020-900219-4