Dynamic time-delayed feedback control of Westwood+ TCP flow control model with communication delay

Dynamic time-delayed feedback control of Westwood+ TCP flow control model with communication delay
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具有通信时延的Westwood TCP流控制模型的动态时滞反馈控制

DOI:
10.1093/imamci/dnx011
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发表时间:
2018-09
影响因子:
1.5
通讯作者:
Yang Yang
Yang Yang
中科院分区:
计算机科学4区
文献类型:
--
作者:
Yu Hongyan;Guo Songtao;Wang Fei;Yang Yang

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本文研究了二阶Westwood + TCP流量控制模型的Hopf分支控制问题。首先,我们提出了一个动态时滞状态反馈控制器来延迟不期望的Hopf分岔的发生。此外,我们证明了具有时滞状态反馈的Westwood + TCP模型可以在时滞参数空间的某个区域上保持平稳状态。特别地,通过动态时滞反馈控制器,在具有优选性质的期望位置处产生合适的Hopf分支。此外,我们分析了建议的控制时滞系统的最右边的特征根的动力学行为通过Lambert W函数。此外,通过对系统的Hopf分岔分析,我们证明了所设计的控制器能够有效地控制系统的不稳定稳态或周期轨道,从而提高系统通信延迟的允许临界值,并推迟不期望的Hopf分岔的发生.最后,我们通过数值结果证明了时滞状态反馈控制器在Hopf分岔控制中的有效性。
In this article, we consider the problem of Hopf bifurcation control in a second-order Westwood + TCP flow control model. First, we propose a dynamic time-delayed state feedback controller to delay the onset of undesirable Hopf bifurcation. Moreover, we show that the Westwood + TCP model with time-delayed state feedback can maintain a stationary state on a certain domain in the delay parameter space. In particular, by the dynamic time-delayed feedback controller, a suitable Hopf bifurcation is created at a desired location with preferred properties. Furthermore, we analyse the dynamic behaviour of the rightmost characteristic root of the proposed controlled time-delayed systems via Lambert W function. In addition, by the Hopf bifurcation analysis, we show that with the proposed controller, one can increase the allowable critical value of the communication delay, and postpone the onset of the undesired Hopf bifurcation by successfully controlling unstable steady states or periodic orbits. Finally, we justify by numerical results the validity of the time-delayed state feedback controller in Hopf bifurcation control.
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