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基于高阶振荡方程的混沌系统。

Chaotic systems based on higher-order oscillatory equations.

作者信息

Petrzela Jiri

机构信息

Department of Radio Electronics, Brno University of Technology, Brno, 61600, Czech Republic.

Department of Electrical Engineering, University of Defence, Brno, 66210, Czech Republic.

出版信息

Sci Rep. 2024 Sep 10;14(1):21075. doi: 10.1038/s41598-024-72034-6.

DOI:10.1038/s41598-024-72034-6
PMID:39256452
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11387476/
Abstract

This paper discusses the design process toward new lumped chaotic systems that originates in higher-order ordinary differential equations commonly used as description of ideal oscillators. In investigated third-order case, two chaotic oscillators were constructed. These systems are dual in the sense of vector field geometry local to fixed points. The existence of robust chaos was proved by both standard routines of numerical analysis and practical measurement. For the fourth-order oscillatory equation, the concept based on interaction between superinductor and supercapacitor was examined in detail. Since both "superelements" are active, the nonlinearity essential to the evolution of chaos is fully passive. It is demonstrated that complex motion is robust and does not represent long transient behavior or numerical artefact. The existence of chaos was verified using standard quantifiers of the flow, such as the largest Lyapunov exponents, recurrence plots, approximate entropy and sensitivity calculation. A good final agreement between theoretical assumptions and practical results will be concluded, on a visual comparison basis.

摘要

本文讨论了源自高阶常微分方程的新型集总混沌系统的设计过程,这些方程通常用于描述理想振荡器。在研究的三阶情况下,构建了两个混沌振荡器。从定点局部的向量场几何意义上讲,这些系统是对偶的。通过数值分析的标准程序和实际测量都证明了鲁棒混沌的存在。对于四阶振荡方程,详细研究了基于超级电感和超级电容相互作用的概念。由于两个“超元件”都是有源的,混沌演化所必需的非线性是完全无源的。结果表明,复杂运动是鲁棒的,并不代表长时间的瞬态行为或数值假象。使用流的标准量化指标,如最大Lyapunov指数、递归图、近似熵和灵敏度计算,验证了混沌的存在。在视觉比较的基础上,理论假设和实际结果将得出良好的最终一致性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/92ad745062f0/41598_2024_72034_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/d6273b03ecb7/41598_2024_72034_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/62b759c32a76/41598_2024_72034_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/3ab9f33a4217/41598_2024_72034_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/2fa5766cccdd/41598_2024_72034_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/ad068855082c/41598_2024_72034_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/5f940d600714/41598_2024_72034_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/e6897fd57f07/41598_2024_72034_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/293d1eb4f10c/41598_2024_72034_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/92ad745062f0/41598_2024_72034_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/d6273b03ecb7/41598_2024_72034_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/62b759c32a76/41598_2024_72034_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/3ab9f33a4217/41598_2024_72034_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/2fa5766cccdd/41598_2024_72034_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/ad068855082c/41598_2024_72034_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/5f940d600714/41598_2024_72034_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/e6897fd57f07/41598_2024_72034_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/293d1eb4f10c/41598_2024_72034_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/395e/11387476/92ad745062f0/41598_2024_72034_Fig9_HTML.jpg

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