共查询到19条相似文献,搜索用时 156 毫秒
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本文利用自适应控制的方法,研究了复杂动态网络有限时间同步控制问题.针对网络的耦合权重已知和耦合权重未知两种情况,分别设计了相应的自适应控制器和参数自适应律.利用有限时间稳定性定理和Lyapunov稳定性理论,证明了复杂动态网络的误差动态系统是有限时间稳定的,并给出了同步过渡时间上界的估计.最后,利用数值算例验证了本文结论的有效性. 相似文献
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提出了一种新的具有未知时变参数复杂动态网络同步的自适应学习控制方法.运用重新参数化技术,设计周期时变参数的自适应学习律、常参数的更新律以及自适应控制策略确保同步误差渐近收敛.通过构造复合能量函数给出同步的一个充分条件.最后给出一个复杂网络的例子验证所提方法的有效性. 相似文献
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超网络是较通常意义上的复杂网络更为复杂的网络,该网络的每一条超边能连接任意多个节点的特性使其比复杂网络能更好地描述真实世界中的复杂系统。针对现有超网络研究中对超网络度量方法的缺陷与不足,提出了一种超网络度量方法——超网络维数(HD),即为所有超边包含的节点权重之和与对应超边权重乘积和的对数值和节点权重之和与超边权重之和乘积对数值的比值的两倍。超网络维数可以应用于节点权重与超边权重为正实数、负实数、纯虚数,乃至复数等多种不同数值类型的带权超网络中。最后给出了超网络维数的若干性质。 相似文献
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时延复杂网络的自适应周期间歇同步控制 总被引:1,自引:0,他引:1
研究同时具有耦合时延和节点时延复杂网络的自适应周期间歇同步控制问题.运用 Lyapunov 稳定性理论,自适应控制、牵制控制和间歇控制方法,给出保证该时延复杂网络全局指数同步、且保守性更小的判定准则,并给出相应的自适应和牵制自适应间歇同步控制器设计,该控制策略对节点间的耦合强度和网络的拓扑结构等具有较强的鲁棒性.最后以时延非线性动力系统为节点对复杂网络进行数值仿真,验证了结论的正确性和有效性. 相似文献
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针对复数域上具有$1+N$节点的多重边赋权驱动响应复杂网络的函数投影同步问题,提出一种简单有效的控制方法.首先,构建$1+N$多重边赋权驱动响应复杂网络模型,网络节点为复混沌系统;然后,定义同步尺度函数为复变量,设计混合反馈控制器,并构造相应的正定函数,利用李雅普诺夫稳定性定理和线性矩阵不等式变换给出同步的充分条件.仿真结果验证了所提出方法的有效性,同时揭示了网络节点重边数对同步速度的影响. 相似文献
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主要研究了在复数域中的复杂网络的修正延时投影同步问题,不仅考虑到了系统参数具有复数性质,还考虑到了修正投影的参数也为复数的情况.基于Lyapunov稳定性理论,通过设定带有延时的复数Lyapunov函数,设计了复杂网络的修正延时投影同步控制器,证明了系统实部和系统虚部将分别达到同步.通过对不同类型的复杂网络的模拟,发现尽管网络的拓扑结构和网络规模不同,均可达到复数延时投影同步.数值仿真的结果证明了上述方法的有效性. 相似文献
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Wenju Du Yinzhen Li Jiangang Zhang Jianning Yu 《International journal of systems science》2019,50(3):534-545
The paper established a conventional bus traffic network and a subway network by using the method of space R based on the existing public traffic network model. Regarding these two networks as the sub-networks, this paper presented a new two-layer-coupled public traffic network with multi-weights through the transfer relationship between conventional bus lines and subway lines. Every edge of this model’s two sub-networks has one or several different property weights, and the coupling edges between two sub-networks have one weight. Based on the method of network split, the paper splits the complex networks with multi-weights into several different single-weighted two-layer-coupled public traffic networks and then investigates its global synchronisation. Finally, according to the synchronisation theory of coupling networks with multi-weights and taking ‘Lorenz system’ as the network node, some numerical examples are given to show the impact of congestion degree, passenger-flow density, transfer degree and capacity matching degree to the two-layer-coupled public traffic network balance. 相似文献
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Yi Chengbo Feng Jianwen Wang Jingyi Xu Chen Zhao Yi Gu Yanhong 《Neural Processing Letters》2019,49(1):141-157
Neural Processing Letters - This paper deals with the synchronization issues of delayed neural networks with multi-weights under aperiodically intermittent pinning control. There are three main... 相似文献
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There are two challenging fundamental questions in pinning control of complex networks: (i) How many nodes should a network with fixed network structure and coupling strength be pinned to reach network synchronization? (ii) How much coupling strength should a network with fixed network structure and pinning nodes be applied to realize network synchronization? To fix these two questions, we propose a general complex dynamical network model and then further investigate its pinning adaptive synchronization. Based on this model, we attain several novel adaptive synchronization criteria which indeed give the positive answers to these two questions. That is, we provide a simply approximate formula for estimating the detailed number of pinning nodes and the magnitude of the coupling strength for a given general complex dynamical network. Here, the coupling-configuration matrix and the inner-coupling matrix are not necessarily symmetric. Moreover, our pinning adaptive controllers are rather simple compared with some traditional controllers. A Barabási-Albert network example is finally given to show the effectiveness of the proposed synchronization criteria. 相似文献
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In this paper, the problem of adaptive synchronization of uncertain coupled complex networks is investigated. Some controllers and adaptive laws are designed to ensure achieving synchronization of a general complex network model. In particular, synchronization of coupled stochastic networks subject to random perturbations is studied, with a referenced node introduced as the target node for synchronization. An example is simulated on delayed neural networks coupled in a small‐world network topology, which demonstrates the feasibility and effectiveness of the proposed adaptive control method. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献
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In this paper, synchronization of an uncertain dynamical network with time‐varying delay is investigated by means of adaptive control schemes. Time delays and uncertainties exist universally in real‐world complex networks. Especially, parameters of nodes in these complex networks are usually partially or completely uncertain. Considering the networks with unknown or partially known nodes, we design adaptive controllers for the corresponding complex dynamical networks, respectively. Several criteria guaranteeing synchronization of such systems are established by employing the Lyapunov stability theorem. Analytical and numerical results show that the proposed controllers have high robustness against parameter variations including network topologies, coupling structures, and strength. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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In this paper, we investigate the locally and globally adaptive synchronization problem for an uncertain complex dynamical network with time-varying coupling delays based on the decentralized control. The coupling terms here are bounded by high-order polynomials with known gains that are ubiquitous in a large class of complex dynamical networks. We generalize the usual technology of searching for an appropriate coordinates transformation to change the network dynamics into a series of decoupled lower-dimensional systems. Several adaptive synchronization criteria are derived by constructing the Lyapunov-Krasovskii functional and Barbalat lemma, and the proposed criteria are simple in form and convenient for the practical engineering design. Numerical simulations illustrated by a nearest-neighbor coupling network verify the effectiveness of the proposed synchronization scheme. 相似文献
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Xu Yuhua Zhou Wuneng Fang Jian-an 《International Journal of Control, Automation and Systems》2012,10(2):415-420
To simulate more realistic networks, we introduce a complex dynamical network model with double non-delayed and double delayed
coupling and further investigate its synchronization phenomenon in this paper. Based on Lyapunov stability theory, adaptive
synchronization criteria is obtained. Analytical result shows that under the designed adaptive controllers, the complex dynamical
network with double non-delayed and double delayed coupling can asymptotically synchronize to a given trajectory. What is
more, the coupling matrix is not assumed to be symmetric or irreducible. Finally, simulation results show the method is effective. 相似文献
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The problem of exponential synchronization for a class of general complex dynamical networks with nonlinear coupling delays by adaptive pinning periodically intermittent control is considered in this paper. We use the methods of the adaptive control, pinning control and periodically intermittent control. Based on the piecewise Lyapunov stability theory, some less conservative criteria are derived for the global exponential synchronization of the complex dynamical networks with coupling delays. And several corresponding adaptive pinning feedback synchronization controllers are designed. These controllers have strong robustness against the coupling strength and topological structure of the network. Using the delayed nonlinear system as the nodes of the networks, a numerical example of the complex dynamical networks with nonlinear coupling delays is given to demonstrate the effectiveness of the control strategy. 相似文献
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非线性耦合的复杂网络自适应同步 总被引:1,自引:0,他引:1
提出了一种通过非线性耦合的复杂网络自适应同步方案,方案具有自适应律简单和应用范围广等特点。证明了动力系统满足给定条件下,该同步方案同步,且同步解是局部和全局渐进稳定的。两个计算机仿真实例分别展示了在无标度网络和最近邻耦合网络上的同步误差变化趋势,验证了同步方案的有效性。 相似文献