• BINOY KRISHNA ROY

      Articles written in Pramana – Journal of Physics

    • A new 5D hyperchaotic system with stable equilibrium point, transient chaotic behaviour and its fractional-order form

      JAY PRAKASH SINGH K RAJAGOPAL BINOY KRISHNA ROY

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      Hidden attractors with the family of stable equilibrium points in higher-dimensional systems are more interesting and difficult discover compared to other families of hidden attractors. In this paper, a new 5D hyperchaotic system is reported. The proposed system has only one stable equilibrium point. Hence, the new system belongs to the category of hidden attractors. Although some lower-dimensional chaotic systems with stable equilibrium points are available in the literature, but very few hyperchaotic systems with stable equilibrium points are reported. The new system is simple considering the number of terms, compared with the existing similar type of systems. The proposed system exhibits multistability and transient chaotic behaviour. The fractional-order counterpart ofthe proposed system is analysed using Adams–Bashforth–Moulton algorithm and the chaotic nature is validated bybifurcation diagram. The simulation results confirm the claims made in the paper.

    • Fractional-order memristor-based chaotic system with a stable equilibrium point, its fractional-order PI-based sliding mode control and switching synchronisation

      PANKAJ PRAKASH JAY PRAKASH SINGH BINOY KRISHNA ROY

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      In this paper,we discuss a new fractional-order memristor-based three-dimensional chaotic system with a stable equilibrium point. The proposed system belongs to the category of hidden attractors dynamical system. The system is new in the sense that it is a fractional-order memristor-based chaotic system and exhibits hidden attractors. The chaotic behaviour of the system is accessed by various numerical techniques such as Lyapunovexponents, bifurcation diagrams, instantaneous phase plot, attractor analyses and frequency spectrum plots. Afractional-order proportional integral (PI)-based sliding mode control is designed for chaos suppression of the proposed system. Further, the switching synchronisation of the new system in the form of the master and the slave systems is presented.

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