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arXiv 1503.08241math.DS
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时滞全连通PLL网络中Hopf分支的稳定性

Stability of Hopf bifurcations in Time-delayed fully-connected PLL networks

Diego Paolo Ferruzzo Correa, Átila Madureira Bueno, José Roberto Castilho Piqueira

摘要:

时滞微分方程(DDEs)的动力学是一个很好的研究问题,主要是因为DDEs出现在许多科学领域的模型中,包括生物学、生理学、种群动力学和工程学。在\textit{Symmetric bifurcation analysis of synchronous states of time-delayed coupled Phase-Locked Loop oscillators}中研究了锁相环振荡器网络参数空间解的性质变化。Communications in Nonlinear Science and数值模拟,Elsevier BV,第22卷,第1-3期,2015年5月,第793-820页,其中,对于两种情况,即保序同步和破序同步,都很好地建立了Hopf分叉的存在性。在这项工作中,我们继续分析探讨的稳定性的小振幅周期解附近出现的Hopf分支的不动点子空间,基于减少到一个二维中心流形的无限维空间。为了证实我们的分析结果,给出了数值模拟。虽然我们探讨了二阶振子的网络动力学,但结果可扩展到更高阶的节点。

英文摘要:

Dynamics in delayed differential equations (DDEs) is a well studied problem mainly because DDEs arise in models in many areas of science including biology, physiology, population dynamics and engineering. The change of nature in the solutions in the parameter space for a network of Phase-Locked Loop oscillators was studied in \textit{Symmetric bifurcation analysis of synchronous states of time-delayed coupled Phase-Locked Loop oscillators}. Communications in Nonlinear Science and Numerical Simulation, Elsevier BV, Volume 22, Issues 1-3, May 2015, Pages 793-820, where the existence of Hopf bifurcations for both cases, symmetry-preserving and symmetry-breaking synchronization was well stablished. In this work we continue the analysis exploring the stability of small-amplitude periodic solutions emerging near Hopf bifurcations in the Fixed-point subspace, based on the reduction of the infinite-dimensional space onto a two-dimensional center manifold. Numerical simulations are presented in order to confirm our analitycal results. Although we explore network dynamics of second-order oscillators, results are extendable to higher order nodes.

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