Degenerate Hopf bifurcations, hidden attractors, and control in the extended Sprott E system with only one stable equilibrium

Authors : Zhouchao WEI, İrene MOROZ, Anping LIU

Pages : 672-687

Doi:10.3906/mat-1305-64

View : 10 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this paper, we introduce an extended Sprott E system by a general quadratic control scheme with 3 arbitrary parameters for the new system. The resulting system can exhibit codimension-one Hopf bifurcations as parameters vary. The control strategy used can be applied to create degenerate Hopf bifurcations at desired locations with preferred stability. A complex chaotic attractor with only one stable equilibrium is derived in the sense of having a positive largest Lyapunov exponent. The chaotic attractor with only one stable equilibrium can be generated via a period-doubling bifurcation. To further suppress chaos in the extended Sprott E system coexisting with only one stable equilibrium, adaptive control laws are designed to stabilize the extended Sprott E system based on adaptive control theory and Lyapunov stability theory. Numerical simulations are shown to validate and demonstrate the effectiveness of the proposed adaptive control.
Keywords : Chaotic attractor, stable equilibrium, Sil`nikov`s theorem, degenerate Hopf bifurcations, hidden attractor