Complex Dynamical Behaviors of a Fractional-Order System Based on a Locally Active Memristor

Complex Dynamical Behaviors of a Fractional-Order System Based on a Locally Active Memristor
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基于局部有源忆阻器的分数阶系统的复杂动态行为

DOI:
10.1155/2019/2051053
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发表时间:
2019-11
期刊:
影响因子:
2.3
通讯作者:
Chen Mo
Chen Mo
中科院分区:
工程技术4区
文献类型:
--
作者:
Yu Yajuan;Bao Han;Shi Min;Bao Bocheng;Chen Yangquan;Chen Mo

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提出了一种分数阶局部有源忆阻器。当由双极性周期信号驱动时,所产生的具有两个交叉点的磁滞回线在原点处被箍缩。磁滞回线的面积随着分数阶数的变化而变化。基于分数阶局部有源忆阻器,构建了分数阶忆阻系统。进行了稳定性分析,并列出了三个平衡点的稳定性条件。给出了与Hopf分支相关的分数阶数的表达式。数值模拟了系统的Hopf分岔、倍周期分岔、双稳和混沌等复杂动力学行为。此外,通过初始值平面上的吸引盆验证了不同分数阶的双稳性。作为验证我们的结果的替代方案,分数阶忆阻系统是通过利用MATLAB的Simulink实现的。研究结果表明,分数阶忆阻器的复杂动力学行为主要归因于两个因素:一是分数阶数对平衡点稳定性的影响,二是分数阶忆阻器的局部激活性。
A fractional-order locally active memristor is proposed in this paper. When driven by a bipolar periodic signal, the generated hysteresis loop with two intersections is pinched at the origin. The area of the hysteresis loop changes with the fractional order. Based on the fractional-order locally active memristor, a fractional-order memristive system is constructed. The stability analysis is carried out and the stability conditions for three equilibria are listed. The expression of the fractional order related to Hopf bifurcation is given. The complex dynamical behaviors of Hopf bifurcation, period-doubling bifurcation, bistability and chaos are shown numerically. Furthermore, the bistability behaviors of the different fractional order are validated by the attraction basins in the initial value plane. As an alternative to validating our results, the fractional-order memristive system is implemented by utilizing Simulink of MATLAB. The research results clarify that the complex dynamical behaviors are attributed to two facts: one is the fractional order that affects the stability of the equilibria, and the other is the local activeness of the fractional-order memristor.
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