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This paper analyzes multi-switching network transmission synchronization (MSNTS) problem among three uncertain chaotic systems with unknown parameters. By constructing the effective switching rules, the definition of MSNTS is given and the synchronization schemes are proposed to reach synchronization between any different states of each derive system and any desired states of every respond system...
This paper aims at enhancing the level of security in chaotic communication for which a switching synchronisation scheme is designed. The authors propose a novel fractional-order chaotic system (FOCS) which undergoes switching between integer-order and fractional-order dynamical subsystems with the help of the synchronisation scheme put forward. The new fractional-order model displays rich bifurcations...
This paper discusses the continuous effect of fractional order parameter on two chaotic systems. Switched synchronization of three different fractional order chaotic systems is presented as an extension for synchronizing two different systems using active control. The proposed technique, which is based on the switching parameters and the scaling factors that control the choices of master and slave...
In this paper, design of sliding mode control (SMC) based controller is proposed for anti-synchronization of Lorenz-Stenflo chaotic system. Anti-synchronization is achieved by using the SMC scheme and Lyapunov stability theory. A proportional-integral switching surface for sliding mode controller is proposed to ensure the stability of the closed-loop error dynamics in sliding motion. Proposed controller...
This work presents chaos synchronization and parameter adaptation using P-C complete replacement scheme. Finally this scheme is applied to secure communication. The advantage of proposed scheme is shown based on the fact that there is no need for controller at the receiver side which is the basic requirement in most of the existing chaotic communication schemes. Only coupling is sufficient to achieve...
In this paper synchronization of two different chaotic systems is proposed using Sliding Mode Control scheme. Lu chaotic system is used as master system and Bhalekar-Gejji chaotic system is used as slave system. Convergence of the synchronizing error is achieved using the Lyapunov stability theory. Synchronization of master and slave system is achieved using the PI (Proportional-Integral) switching...
In this paper, master-slave synchronization scheme of non-identical hyperchaotic systems is discussed using the sliding mode control strategy. Hyperchaotic Lu system is considered as master and hyperchaotic Bao system as slave system. Lyapunov stability theory is used for stabilization and convergence of error dynamics. A proportional-integral (PI) switching surface is proposed to ensure the synchronization...
This paper presents switched modified function projective synchronization of two different hyperchaotic systems using adaptive control method. On the basis of Lyapunov stability theory, an adaptive controller for the synchronization of two different hyperchaotic systems is designed, and some parameter update laws for estimating the unknown parameters of the systems are also gained. This technique...
In digital communication systems, application of chaotic signals offers several advantages. One of the most important advantages is increased security which is due to their noise-like and broad spectrum characteristics. In order to find an efficient way for chaotic system synchronization and secure communications this paper combines chaotic masking and chaotic modulation encryptions. The proposed...
In this paper, sliding mode based control and synchronization scheme is proposed for a new four-dimensional chaotic system named as modified Lorenz-Stenflo (MLS) system. By selecting Proportional-Integral (PI) switching surface appropriately, a sliding mode controller is designed. This controller guarantees the occurrence of sliding motion and achieves synchronization of MLS chaotic systems in master-...
A new chaotic system is built which is consists of three subsystems. A subsystem is analyzed such as equilibrium, eigenvalue, Lyapunov, dimension and Lyapunov exponent. A practical circuit is designed to realize the system and the experimentation is carried out. The manifold chaotic attractor of the three subsystems is observed in the oscillograph, it is good agree with simulation.
Chaotic masking and chaotic switching are two basic forms of chaos synchronization, they are important in secure communication applications. Chaos masking resemble a traditional sense of modulation, Chaotic masking transmitted out analog signal directly simple to realize, with high security. Chaotic switching is used digital signal modulation, compared with chaos masking signal fidelity of higher.
A number of methods have been proposed for synchronizing chaotic systems. The most widely used methods are continuous synchronization schemes. In a continuous synchronization scheme, chaotic systems are coupled to each other continuously such that synchronization errors converge to zero. In this paper, chaos synchronization in coupled discrete-time dynamical systems is presented. Simulation results...
In this paper, two chaos-based communication schemes to transmit encrypted information are presented. We use Generalized Hamiltonian forms approach to synchronize two unidirectionally coupled n-scrolls chaotic attractors. First, a scheme is set-up to transmit binary signals by applying chaotic switching technique. Both coupling signal and confidential message are send by only one transmission channel...
In this paper the impulsive control scheme of Chua's Oscillators is represented. Using Lyapunov's direct method, we present conditions under which impulsively controlled Chua's Oscillators is globally exponentially stable. Numerical experimental results are given to demonstrate the obtained impulsive control theorem.
This paper deals with the robust synchronization problem of the switched modified Chua's circuit systems accompanied by a time-driven switching law. Based on the Lyapunov stability theory, a sliding mode controller to guarantee the synchronization of the switched master-slave chaotic systems is determined. Finally, the numerical simulation is given to demonstrate the effectiveness of the proposed...
The problem of synchronization for fractional master-slave Lorenz chaotic systems coupled with switched modified is investigated. Based on the Lyapunov stability theory and using the sliding mode control technique, a control scheme containing a new fraction-integer integral (FII) switching surface is developed to guarantee the synchronization of fractional Lorenz chaotic systems even when the switched...
The problem of synchronization of discrete chaotic systems by using variable structure control scheme is investigated in this article. To design a suitable controller, the theory of quasi-sliding mode control is modified and applied. Sufficient conditions for the convergence of the control algorithm are theoretically derived and it is shown that the error trajectories converge toward a bounded region...
In this study, the secure communication application of switched chaotic systems which depend on a time-driven switching law is considered. The secure communications is set up by the masking scheme. Based on Lyapunov stability theorem, linear matrix inequality (LMI), and linear matrix equality (LME) optimization techniques, an output feedback controller is designed to synchronize the master-slave system...
The problem of synchronization for fractional master-slave Lorenz chaotic systems coupled with sector nonlinear control input is investigated. Using the sliding mode control technique, a control scheme containing a new fraction-integer integral (FII) switching surface is developed to guarantee the synchronization of fractional Lorenz chaotic systems even when the sector nonlinearity is present. Numerical...
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