共查询到19条相似文献,搜索用时 171 毫秒
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一种超混沌混合保密通信方案 总被引:2,自引:1,他引:1
本文将超混沌系统单变量单向耦合同步方法与两信道保密通信方案相结合,给出了一种双信道超混沌混合保密通信方案。发送端利用超混沌振荡器的一个或多个状态产生混沌密钥和遮掩信号,对信息信号先加密再遮掩,获得加密信号后使用一个信道传输;利用另一信道传输实现超混沌系统同步的单变量同步信号。接收端基于单变量单向耦合同步方法获得解密同步信号,实现信息信号高信噪比恢复。仿真结果表明了方案的有效性。 相似文献
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新型超混沌系统同结构与异结构广义同步 总被引:2,自引:0,他引:2
基于线性系统稳定性理论,该文设计出一种新型的非线性反馈控制器,实现四维超混沌系统的同结构以及异结构的广义投影同步。该方法具有适用范围广、简单、灵活以及易于实现等优点。通过改变广义投影同步的比例因子,获得任意比例于原驱动混沌系统输出的混沌信号。数值仿真验证了所设计的控制器有效性。 相似文献
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基于状态观测器的超混沌同步方法研究 总被引:3,自引:0,他引:3
研究超混沌系统同步问题,指出现有超混沌同步方法存在的缺点,及基于状态观测器的超混沌同步方法,并且应用于单向耦合蔡氏电路构成的超混沌系统同步设计. 相似文献
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对一个新的超混沌系统通过分数阶线性系统稳定性理论分析得出其分数阶形式,并利用matlab仿真得出该系统的混沌吸引子图像.接着对该分数阶系统的同阶数和不同阶数两种形式进行异结构的同步分析,设计自适应同步控制器,实现该系统的异结构同步,数值仿真的结果表明设计控制器很好的实现了驱动系统和响应系统的同步. 相似文献
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新混沌系统与变形蔡氏电路系统的异结构同步 总被引:1,自引:0,他引:1
研究一个新的混沌系统与变形蔡氏电路系统的异结构同步问题.基于Lyapunov稳定性理论,分步构造Lyapunov函数,并在响应系统中采用设计单个非线性控制器的方式,实现了这两个不同混沌系统之间的异结构同步,并证明误差变量随时间演变时是逐渐趋于零的.数值模拟验证了这种方法的可行性和有效性,所设计的控制器具有可操作性强,同步效果好,易于推广等优点. 相似文献
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Department of Electronic Information Zhejiang Ocean University Zhoushan ChinaLIU Yu-liang ZHU Jie DING Da-wei Department of Electronic Engineering Shanghai Jiaotong University Shanghai China 《中国邮电高校学报(英文版)》2007,14(2):103-105
By the control method independent of system parameters, synchronization of two Chen chaotic systems with identical, but uncertain parameters is discussed in this article. Based on Lyapunov’s theorem, an adaptive controller and the parameters estimate update law are derived to make the solution of the error dynamical equation converge at the point E(0, 0, 0) with a quick speed, that is, the states of two Chen chaotic systems can be asymptotically synchronized. Numerical simulations verify the effectiveness and the adaptivity to the variation of Chen system parameters. 相似文献
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In PCM integrated communication systems in which PCM telephone signals are transmitted and switched in an integrated manner, the clock frequency of the PCM signals in the whole network must be synchronized. Mutual synchronization was proposed for this purpose. This is an important application of a phase-locked oscillator. By interconnecting two phase-locked oscillators to control each other, the frequency of the interconnected system will be the average of the free-running frequencies of the two oscillators. By interconnecting a number of multiple input phase-locked oscillators, all the oscinators can be synchronized. The synchronization system based on this principle is called mutual synchronization and various versions of mutually synchronized systems have been proposed. Since the interconnected system of phase-locked oscillators includes many positive and negative feedback loops, to design a system, the dynamic as well as the static behavior of the system should be carefully analyzed. This paper describes the principle of various versions of mutually synchronized systems and the results of analyses on the dynamic and static behavior of mutually synchronized systems. 相似文献
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Chaotic and hyperchaotic systems with interesting behaviors have been of interest in the recent years. In this paper we introduce a hyperchaotic memristor oscillator which shows both stable and unstable fixed points. Such systems have been less investigated in the literatures. It should also to be noted that the proposed hyperchaotic system has only one nonlinearity which is a flux controlled memristor. Depending on the control parameter, the system displays different behaviors and coexisting attractors. A linear quadratic regulator based synchronization of the proposed hyperchaotic system is designed and numerically analyzed. We also design such a fuzzy based PID controller for chaos control in such a memristor oscillator. 相似文献
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该文针对含未知参数的异结构超混沌复系统,基于自适应控制及Lyapunov稳定性理论,提出一种新的自适应广义组合复同步方法 (GCCS)。首先给出广义组合复同步的定义,将驱动-响应系统的同步问题转化为误差系统零解的稳定性问题;然后从理论上设计了非线性反馈同步控制器及参数辨识更新律,并引入误差反馈增益,以控制同步的收敛速度;最后以超混沌复Lorenz系统、超混沌复Chen系统、超混沌复L系统的广义组合复同步与参数估计为例,从数值仿真角度验证了所提方法的正确性和有效性。 相似文献
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针对一种火炮群在强随机未知干扰的影响下的运动同步问题,运用交叉耦合的同步控制方法,以两门火炮的同步控制为例,设计了火炮的随动运动控制器.这种控制器算法简单,功能稳定,可扩展到多门火炮的同步控制.计算机仿真结果表明,运用这种控制方法,火炮之间的运动误差最大幅值将从O.2降至0.08,减小了近60%,效果显著,可以较好地实... 相似文献
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