The structure of the chaotic attractor of a system is mainly determined by the nonlinear functions in system equations. By using a new saw-tooth wave function and a new stair function, a novel complex grid multiwing chaotic system which belongs to non-Shil’nikov chaotic system with non-hyperbolic equilibrium points is proposed in this paper. It is particularly interesting that the complex grid multiwing attractors are generated by increasing the number of non-hyperbolic equilibrium points, which are different from the traditional methods of realising multiwing attractors by adding the index-2 saddle-focus equilibrium points in double-wing chaotic systems. The basic dynamical properties of the new system, such as dissipativity, phase portraits, the stability of the equilibria, the time-domain waveform, power spectrum, bifurcation diagram, Lyapunov exponents, and so on, are investigated by theoretical analysis and numerical simulations. Furthermore, the corresponding electronic circuit is designed and simulated on the Multisim platform. The Multisim simulation results and the hardware experimental results are in good agreement with the numerical simulations of the same system on Matlab platform, which verify the feasibility of this new grid multiwing chaotic system.
Grid multiwing attractor non-hyperbolic equilibrium point saddle-focus equilibrium point circuit implementation
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The work is supported by the National Natural Science Foundations of China under Grant No. 61471310, the Natural Science Foundations of Hunan Province, China under Grant No. 2015JJ2142, the Research Foundation of Education Bureau of Hunan Province, China under Grant No. 17C1530 and the Natural Science Foundation of Xiangtan University, China under Grant No. 15XZX33.