Chaos-Chaos Intermittency Synchronization Induced by Feedback Signals and Stochastic Noise in Coupled Chaotic Systems
Chaos-Chaos Intermittency Synchronization Induced by Feedback Signals and Stochastic Noise in Coupled Chaotic Systems
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DOI：
10.1587/transfun.2019eap1160
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
S. Nobukawa;Nobuhiko Wagatsuma;H. Nishimura
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文献类型：
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作者：
S. Nobukawa;Nobuhiko Wagatsuma;H. Nishimura
在耦合混沌系统中，各种类型的同步现象已经被报道。近年来，这些现象的应用已经在传感器网络系统、安全通信系统和生物医学系统中得到利用。混沌-混沌不变性（Chaos-Chaosmigration，CCI）同步是一种特殊的同步现象。在此之前，我们提出了一种新的混沌控制方法，称为“缩减轨道区域（RRO）方法”，以实现CCI同步使用外部反馈信号。这种方法已经引起了研究的关注，因为它能够诱导CCI同步，这可以实现，即使内部系统参数不能通过外部因素进行调整。此外，已知加性随机噪声具有类似的效果。本研究的目的是比较RRO方法和应用随机噪声的方法的性能，这两种方法都能够诱导CCI同步。结果表明，虽然在诱导吸引子合并条件下两种控制方法都能实现CCI同步，但RRO方法具有更高的适应性，与加性随机噪声相比，CCI同步程度更高.这一优点为耦合混沌系统同步的应用提供了便利。关键词：混沌，同步，控制，缩减轨道域法
Various types of synchronization phenomena have been reported in coupled chaotic systems. In recent years, the applications of these phenomena have been advancing for utilization in sensor network systems, secure communication systems, and biomedical systems. Specifically, chaos–chaos intermittency (CCI) synchronization is a characterized synchronization phenomenon. Previously, we proposed a new chaos control method, termed as the “reduced region of orbit (RRO) method,” to achieve CCI synchronization using external feedback signals. This method has been gathering research attention because of its ability to induce CCI synchronization; this can be achieved even if internal system parameters cannot be adjusted by external factors. Further, additive stochastic noise is known to have a similar effect. The objective of this study was to compare the performance of the RRO method and the method that applies stochastic noise, both of which are capable of inducing CCI synchronization. The results showed that even though CCI synchronization can be realized using both control methods under the induced attractor merging condition, the RRO method possesses higher adoptability and accomplishes a higher degree of CCI synchronization compared to additive stochastic noise. This advantage might facilitate the application of synchronization in coupled chaotic systems. key words: chaos, synchronization, control, reduced region of orbit method