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1.
Chaos communication based on synchronization of discrete-time chaotic systems 总被引:2,自引:0,他引:2 下载免费PDF全文
A novel chaos communication method is proposed based on synchronization of discrete-time chaotic systems. This method uses a full-order state observer to achieve synchronization and secure communication between the transmitter and the receiver. Further, we present a multiple-access chaotic digital communication method by combining the observer with the on-line least square method. Simulation results are also given for illustration. 相似文献
2.
Decentralized state-feedback chaotification method of discrete Takagi-Sugeno fuzzy systems 下载免费PDF全文
A new chaotification method is proposed for making an arbitrarily given discrete Takagi-Sugeno (TS) fuzzy system chaotic. Based on a given discrete TS fuzzy system, the new chaotification method uses the decentralized state-feedback control and the continuous sawtooth function, instead of the modulo operation, to construct a chaotic nonlinear system,which can generate discrete chaos with the arbitrarily desired amplitude bound. We apply the improved Marotto theorem to mathematically prove that the controlled system is chaotic in the sense of Li and Yorke. In particular, an explicit formula for the computation of chaotification parameters is obtained. A numerical example is used to illustrate the theoretical results. 相似文献
3.
In this paper, the fractional-order Genesio--Tesi system showing chaotic
behaviours is introduced, and the corresponding one in an integer-order form
is studied intensively. Based on the harmonic balance principle, which is
widely used in the frequency analysis of nonlinear control systems, a
theoretical approach is used to investigate the conditions of system
parameters under which this fractional-order system can give rise to a
chaotic attractor. Finally, the numerical simulation is used to verify the
validity of the theoretical results. 相似文献
4.
Chaotic dynamics of the fractional-order Ikeda delay system and its synchronization 总被引:3,自引:0,他引:3 下载免费PDF全文
In this paper we numerically investigate the chaotic
behaviours of the fractional-order Ikeda delay system. The results show
that chaos
exists in the fractional-order Ikeda delay system with order less than 1.
The lowest order for chaos to be able to appear in this system is found
to be 0.1. Master--slave
synchronization of chaotic fractional-order Ikeda delay systems with linear
coupling is also studied. 相似文献
5.
6.
A new output feedback synchronization theorem for a class of chaotic systems with a scalar transmitted signal 下载免费PDF全文
This paper proposes a new, simple and yet applicable output feedback
synchronization theorem for a large class of chaotic systems. We take a
linear combination of drive system state variables as a scale-driving
signal. It is proved that synchronization between the drive and the response
systems can be obtained via a simple linear output error feedback control.
The linear feedback gain is a function of a free parameter. The approach is
illustrated using the R\"{o}ssler hyperchaotic systems and Chua's chaotic
oscillators. 相似文献
7.
In this paper, an approach for chaotifying a stable controllable
linear system via single input state-feedback is presented. The
overflow function of the system states is designed as the
feedback controller, which can make the fixed point of the
closed-loop system to be a snap-back repeller, thereby yields
chaotic dynamics. Based on the Marotto theorem, it proves
theoretically that the closed-loop system is chaotic in the
sense of Li and Yorke. Finally, the simulation results are used
to illustrate the effectiveness of the proposed method. 相似文献
8.
9.
研究了利用分散状态反馈控制使稳定的Takagi-Sugeno(TS)模糊系统产生Devaney混沌的问题。所提的分散反馈控制器是由分散线性反馈控制器与2补运算的溢出非线性函数复合而成的。2补运算的溢出非线性导致了复杂动态。应用Shi-Chen定理从数学上证明了受控系统在Devaney意义下确实是混沌的。给出了计算混沌化参数的解析公式。一个数值例子被用来说明所提的理论结果。 相似文献
10.
研究了利用任意小幅值的状态反馈控制来混沌化稳定的Takagi-Sugeno (TS) 模糊系统问题。所用状态反馈控制器是系统状态的锯齿函数。我们应用改进的Marotto定理从数学上证明了受控系统在Li-Yorke意义下是混沌的。特别地,给出了计算混沌化参数的解析公式。最后一个数值例子被用来说明所提的理论结果。 相似文献