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Experimental Results Versus Computer Simulations of Noisy Poincaré Maps in an Intermittency Scenario
Regular and Chaotic Dynamics ( IF 0.8 ) Pub Date : 2020-05-31 , DOI: 10.1134/s1560354720030041
Ezequiel del Rio , Sergio Elaskar

Intermittency is a route to chaos when transitions between laminar and chaotic dynamics occur. The main attribute of intermittency is the reinjection mechanism, described by the reinjection probability density (RPD), which maps trajectories of the system from the chaotic region into the laminar one. The main results on chaotic intermittency strongly depend on the RPD. Recently a generalized power law RPD has been observed in a wide class of 1D maps. Noise has an impact on the intermittency phenomena and the generalized RPD introduces a novel scenario because it is affected by the noise. An analytical approach was introduced to estimate the noisy RPD (NRPD). In this work we investigate the noisy RPD in two cases: an experimental continuous system, by means of a Poincaré map associated to it, and a numerical map chosen close to the experimental one. In the experimental map we use the internal noise of the circuit, whereas in the numerical map we introduce the noise in the usual way.We have compared both noisy dynamics and found important differences between them, concerning the propagation of the noise effect from the maximum of the map (where the power law is generated) into the laminar region.To mimic the numerical map by the experiment, we introduced an external noise during a short window of time, obtaining similar results to the ones obtained in the internal natural noise case. We found that our methodology developed to study the noise intermittency can be used to investigate which class of noise is present in continuous systems.

中文翻译:

间歇场景中嘈杂庞加莱图的实验结果与计算机模拟

当层流和混沌动力学之间发生过渡时,间歇性是通往混乱的途径。间歇性的主要属性是再注入机制,由再注入概率密度(RPD)描述,该机制将系统的轨迹从混沌区域映射到层流区域。混沌间歇性的主要结果在很大程度上取决于RPD。最近,在广泛的一维地图中已观察到广义幂定律RPD。噪声对间歇性现象有影响,而广义RPD由于受到噪声的影响而引入了一种新颖的方案。引入了一种分析方法来估计有噪声的RPD(NRPD)。在这项工作中,我们在两种情况下研究有噪声的RPD:一种是通过与之关联的Poincaré映射进行的实验性连续系统,另一种是在实验性系统附近选择的数值图。在实验图中,我们使用电路的内部噪声,而在数值图中,我们以通常的方式引入噪声。我们比较了两种有噪声的动力学,并发现了两者之间的重要差异,这涉及到噪声效应从最大值到最大值的传播。为了模拟实验中的数值图,我们在很短的时间内引入了外部噪声,获得了与内部自然噪声情况下相似的结果。 。我们发现,开发用于研究噪声间歇性的方法可用于研究连续系统中存在的噪声类别。我们比较了这两种嘈杂的动力学,发现它们之间有重要的区别,涉及到噪声效应从图的最大值(生成幂律的地方)向层流区域的传播。通过模拟实验来模拟数值图在较短的时间范围内产生外部噪声,获得的结果与内部自然噪声情况下获得的结果相似。我们发现,开发用于研究噪声间歇性的方法可用于研究连续系统中存在的噪声类别。我们比较了这两种嘈杂的动力学,发现它们之间有重要的区别,涉及到噪声效应从图的最大值(生成幂律的地方)向层流区域的传播。通过模拟实验来模拟数值图在较短的时间范围内产生外部噪声,获得的结果与内部自然噪声情况下获得的结果相似。我们发现,开发用于研究噪声间歇性的方法可用于研究连续系统中存在的噪声类别。我们在很短的时间内引入了外部噪声,获得了与内部自然噪声情况下相似的结果。我们发现,开发用于研究噪声间歇性的方法可用于研究连续系统中存在的噪声类别。我们在很短的时间内引入了外部噪声,获得了与内部自然噪声情况下相似的结果。我们发现,开发用于研究噪声间歇性的方法可用于研究连续系统中存在的噪声类别。
更新日期:2020-05-31
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