共查询到20条相似文献,搜索用时 62 毫秒
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研究一类延迟神经网络的反同步问题.根据Lypunov稳定性理论和Halanay不等式,设计了一类控制器,并从理论上证明该控制器可以实现一类延迟神经网络的反同步.通过对两个典型的延迟混沌神经网络的数值模拟研究,验证所提方案的有效性. 相似文献
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针对带有完全未知的非线性不确定项和外界扰动的异结构分数阶时滞混沌系统的同步问题,基于Lyapunov稳定性理论,设计了自适应径向基函数(radial basis function,RBF)神经网络控制器以及整数阶的参数自适应律.该控制器结合了RBF神经网络和自适应控制技术,RBF神经网络用来逼近未知非线性函数,自适应律用于调整控制器中相应的参数.构造平方Lyapunov函数进行稳定性分析,基于Barbalat引理证明了同步误差渐近趋于零.数值仿真结果表明了该控制器的有效性. 相似文献
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基于分数阶系统稳定性理论,提出了用状态观测器来实现分数阶混沌系统完全状态投影同步的思想. 设计的状态观测器能够实现一类非线性分数阶系统的完全状态投影同步而不要求分数阶混沌系统是部分线性的,推广了投影同步的应用范围,且无需计算系统的条件Lyapunov指数. 另外,该方法理论严格,设计简单,能够达到任意比例因子的完全状态同步. 最后,利用该方法实现了分数阶Rssler系统的完全状态投影同步,数值仿真结果证实了它的有效性.
关键词:
分数阶
混沌系统
状态观测器
投影同步 相似文献
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For the first time, we report on projective synchronization between two time delay chaotic systems with single time delays. It overcomes some limitations of the previous work, where projective synchronization has been investigated only in finite-dimensional chaotic systems, so we can achieve projective synchronization in infinitedimensional chaotic systems. We give a general method with which we can achieve projective synchronization in time-delayed chaotic systems. The method is illustrated using the famous delay-differential equations related to optical bistability. Numerical simulations fully support the analytical approach. 相似文献
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利用两种方法研究了统一超混沌系统的同步问题.首先以全状态混合投影自适应同步方法,基于Lyapunov稳定性理论,设计了自适应控制器,理论证明了该控制器可以实现参数已知的统一超混沌系统的全状态混合映射同步.其次使用主动控制同步方法,设计了同步控制器,实现了统一超混沌系统的完全同步,最后数值仿真实验进一步验证了所提出方案的有效性.
关键词:
统一超混沌系统
自适应控制器
全状态混合投影同步
主动控制同步 相似文献
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Generalized projective synchronization via the state observer and its application in secure communication 下载免费PDF全文
Based on the improved state observer and the pole placement technique,by adding a constant which extends the scope of use of the original system,a new design method of generalized projective synchronization is proposed.With this method,by changing the projective synchronization scale factor,one can achieve not only complete synchronization,but also anti-synchronization,as well as arbitrary percentage of projective synchronization,so that the system may attain arbitrary synchronization in a relatively short period of time,which makes this study more meaningful.By numerical simulation,and choosing appropriate scale factor,the results of repeated experiments verify that this method is highly effective and satisfactory.Finally,based on this method and the relevant feedback concept,a novel secure communication project is designed.Numerical simulation verifies that this secure communication project is very valid,and moreover,the experimental result has been greatly improved in decryption time. 相似文献
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We investigate the projective synchronization of different chaotic systems with nonlinearity inputs.Based on the adaptive technique,sliding mode control method and pole assignment technique,a novel adaptive projective synchronization scheme is proposed to ensure the drive system and the response system with nonlinearity inputs can be rapidly synchronized up to the given scaling factor. 相似文献