Linear matrix inequality approach for synchronization control of fuzzy cellular neural networks with mixed time delays

Fuzzy cellular neural networks （FCNNs） are special kinds of cellular neural networks （CNNs）. Each cell in an FCNN contains fuzzy operating abilities. The entire network is governed by cellular computing laws. The design of FCNNs is based on fuzzy local rules. In this paper, a linear matrix inequality （LMI） approach for synchronization control of FCNNs with mixed delays is investigated. Mixed delays include discrete time-varying delays and unbounded distributed delays. A dynamic control scheme is proposed to achieve the synchronization between a drive network and a response network. By constructing the Lyapunov-Krasovskii functional which contains a triple-integral term and the free-weighting matrices method an improved delay-dependent stability criterion is derived in terms of LMIs. The controller can be easily obtained by solving the derived LMIs. A numerical example and its simulations are presented to illustrate the effectiveness of the proposed method.

Anti-windup compensation design for a class of distributed time-delayed cellular neural networks

Both time-delays and anti-windup(AW)problems are conventional problems in system design,which are scarcely discussed in cellular neural networks(CNNs).This paper discusses stabilization for a class of distributed time-delayed CNNs with input saturation.Based on the Lyapunov theory and the Schur complement principle,a bilinear matrix inequality(BMI)criterion is designed to stabilize the system with input saturation.By matrix congruent transformation,the BMI control criterion can be changed into linear matrix inequality(LMI)criterion,then it can be easily solved by the computer.It is a one-step AW strategy that the feedback compensator and the AW compensator can be determined simultaneously.The attraction domain and its optimization are also discussed.The structure of CNNs with both constant timedelays and distribute time-delays is more general.This method is simple and systematic,allowing dealing with a large class of such systems whose excitation satisfies the Lipschitz condition.The simulation results verify the effectiveness and feasibility of the proposed method.

Generalized LMI-based approach to global asymptotic stability of cellular neural networks with delay

A global asymptotic stability problem of cellular neural networks with delay is investigated. A new stability condition is presented based on the Lyapunov-Krasovskii method, which is dependent on the amount of delay. A result is given in the form of a linear matrix inequality, and the admitted upper bound of the delay can be easily obtained. The time delay dependent and independent results can be obtained, which include some previously published results. A numerical example is given to show the effectiveness of the main results.

Exponential stability of cellular neural networks with multiple time delays and impulsive effects

In this work, the stability issues of the equilibrium points of the cellular neural networks with multiple time delays and impulsive effects are investigated. Based on the stability theory of Lyapunov-Krasovskii, the method of linear matrix inequality （LMI） and parametrized first-order model transformation, several novel conditions guaranteeing the delaydependent and the delay-independent exponential stabilities are obtained. A numerical example is given to illustrate the effectiveness of our results.

Global exponential stability analysis of cellular neural networks with multiple time delays

Global exponential stability problems are investigated for cellular neural networks （CNN） with multiple time-varying delays. Several new criteria in linear matrix inequality form or in algebraic form are presented to ascertain the uniqueness and global exponential stability of the equilibrium point for CNN with multiple time-varying delays and with constant time delays. The proposed method has the advantage of considering the difference of neuronal excitatory and inhibitory effects, which is also computationally efficient as it can be solved numerically using the recently developed interior-point algorithm or be checked using simple algebraic calculation. In addition, the proposed results generalize and improve upon some previous works. Two numerical examples are used to show the effectiveness of the obtained results.

Asymptotical mean square stability of cellular neural networks with random delay

In this paper,the asymptotical mean-square stability analysis problem is considered for a class of cellular neural networks (CNNs) with random delay. Compared with the previous work,the delay is modeled by a continuous-time homogeneous Markov process with a finite number of states. The main purpose of this paper is to establish easily verifiable conditions under which the random delayed cellular neural network is asymptotic mean-square stability. By using some stochastic analysis techniques and Lyapunov-Krasovskii functional,some conditions are derived to ensure that the cellular neural networks with random delay is asymptotical mean-square stability. A numerical example is exploited to show the vadlidness of the established results.

A new neural network model for the feedback stabilization of nonlinear systems

A new neural network model termed ‘standard neural network model’ (SNNM) is presented, and a state-feedback control law is then designed for the SNNM to stabilize the closed-loop system. The control design constraints are shown to be a set of linear matrix inequalities (LMIs), which can be easily solved by the MATLAB LMI Control Toolbox to determine the control law. Most recurrent neural networks (including the chaotic neural network) and nonlinear systems modeled by neural networks or Takagi and Sugeno (T-S) fuzzy models can be transformed into the SNNMs to be stabilization controllers synthesized in the framework of a unified SNNM. Finally, three numerical examples are provided to illustrate the design developed in this paper.

区间时变细胞神经网络的全局鲁棒指数稳定性

研究了一类区间时变扰动、变时滞细胞神经网络的全局鲁棒指数稳定性问题．利用Leibniz-Newton公式对原系统进行模型变换,并分析了变换模型和原始模型的等价性．基于变换模型,运用线性矩阵不等式的方法,通过选择适当的Lyapunov-Krasovskii泛函,推导了该系统全局鲁棒指数稳定的时滞相关的充分条件．通过数值实例将所得结果与前人的结果相比较,表明了本文所提出的稳定判据具有更低的保守性．

一类具变时滞细胞神经网络的全局渐近稳定性

讨论一类具变时滞细胞神经网络平衡点的唯一性和全局渐近稳定性,利用矩阵不等式,通过构造合适的Lyapunov泛函,得到了具变时滞细胞神经网络全局渐近稳定性的新的充分条件.

多时变时滞细胞神经网络的全局渐近稳定

研究了多时变时滞细胞神经网络的全局渐近稳定问题。给出了多时变时滞细胞神经网络平衡点唯一性和全局渐近稳定的几个新充分判据。所研究的网络模型扩展了现有的同类网络模型,而且所得到的这些新稳定判据考虑了神经元激励和抑制的影响,且能够表示成线性矩阵不等式的形式,易于用现有的内点算法等方法验证。通过2个注释说明了所得结果的有效性。

滞后细胞神经网络的鲁棒无源分析

考虑了多胞不确定性滞后细胞神经网络(DCNNs)的无源分析问题。基于近期研究成果和线性矩阵不等式(LMI)技术,给出了一个判定DCNNs无源性的新准则,这个新的准则实现了DCNNs系统矩阵和Lyapunov矩阵的完全分离。当DCNNs所受不确定性为多胞类型的不确定性时,该准则相对于基于二次稳定框架的准则而言,可以降低保守性。数值算例揭示了本文方法的有效性。

一类时变时滞模糊细胞神经网络的时滞依赖指数稳定性判据

针对一类带有时变时滞的模糊细胞神经网络,通过适当的构造Lyapunov-Krasovskii泛函,以线性矩阵不等式的形式提出了一种新颖的依赖于时滞的全局指数稳定性判据.与之前结果相比,所提出的判据针对模糊时滞项进行了变换,从而首次考虑了模糊细胞神经网络中非模糊项的连接权矩阵中元素的符号问题,降低了判据的保守性.并且时滞变化率的限制将被放松.仿真结果进一步证明了判据的有效性.

一种新的时滞细胞神经网络全局渐近稳定性准则

研究了一类具有时滞的细胞神经网络全局稳定性问题。首先,提出所研究的时滞细胞神经网络模型、系统激活函数所需满足的条件及本文需要用到的引理。然后,将所研究的系统通过一个等式进行线性变换,在定义一个与系统相关的积分操作基础上讨论时滞细胞神经网络的全局渐近稳定性。与早期的文献结果相比,本文所得结果具有更少保守性,并且该条件是与时滞相关的。本文所得到的稳定性准则可以很容易地求出系统稳定的时滞上界,进而可以很容易得到时滞无关稳定性结果。最后,用一个数值例子证明本文所得的稳定性条件是有效的。

时滞无关的CNN稳定性分析及保密通信应用

针对存在延时情况下的细胞神经网络系统稳定性判定问题,构造新型Lyapunov-Krasovskii泛函并结合Lyapunov稳定性理论及线性矩阵不等式,得到用于判定时滞细胞神经网络具有唯一平衡点和全局渐近稳定性的一组充分条件。数值仿真实验结果证明,该判定条件具有较好的可验证性和可实现性,且与时滞无关,适用于保密通信。

混合变时滞的中立型神经网络全局指数稳定性

利用Lyapunov-Krasovskii稳定性理论和线性矩阵不等式(LMI)处理方法,研究了一类具有混合时变时滞的中立型细胞神经网络的全局指数稳定性问题,获得了该模型平衡点全局指数稳定的一个新的充分条件.改进和推广了已有文献的结果,降低了系统的保守性.所得结论对更好的模拟细胞神经网络的行为具有重要的指导意义.

一类随机BAM细胞神经网络的指数稳定性

研究了一类随机BAM细胞神经网络的指数稳定性,利用Lyapunov函数理论、It公式和线性矩阵不等式方法,建立了这种细胞神经网络均方指数稳定性判定的充分性条件.

一类多重时滞细胞神经网络指数稳定性分析

针对一类多重时滞细胞神经网络，利用Lyapunov稳定性理论方法进行指数稳定性分析，给出基于线性矩阵不等式（LMI）的指数稳定性定理．首先通过状态变换，得到该神经网络的等价模型．然后，构造出合适的Lyapunov泛函，并运用线性矩阵不等式理论方法，得到了多重时滞神经网络在常时滞和时变时滞两种情况下指数稳定的一系列充分条件．本文所提出的方法保守程度低，容易利用标准的Matlab-LMI工具来进行仿真验证，同时也适用于其它具有递归神经网络的稳定性分析．

关于时滞细胞神经网络稳定性的一个改进结果

在文章[1]中,作者提出了关于时滞细胞神经网络存在唯一平衡点和全局渐近稳定性的充分条件。本文主要指出了文章[1]中相关结论的不足,并改进了建立在线性矩阵不等式基础上的时滞细胞神经网络全局渐近稳定的结果。此外,这些关于时滞细胞神经网络时滞依赖的全局渐近的稳定性的新结果可以保证系统的指数渐近稳定性。

线性矩阵不等式及其在细胞神经网络保性能控制中的应用

线性矩阵不等式的优良性质可用于解决细胞神经网络中的保性能控制问题.本文介绍了线性矩阵不等式的相关概念和性质;通过对Schur补引理的改进提出了一个引理,从而更容易将二次矩阵不等式转化为线性矩阵不等式,更好地应用于控制参数求解;提出了LMI的基本问题和MATLAB工具箱,并对LMI在细胞神经网络的保性能控制问题作出了简要描述.

一类细胞神经网络的时滞相关全局稳定性判据

研究了一类带有离散和分布时间滞后的不确定时滞细胞神经网络(DCNN)的全局渐进稳定性。应用李亚普诺夫稳定性理论,构造李亚普诺夫泛函,结合Leibniz-Newton公式,给出一个关于时滞细胞神经网络的新颖的全局渐进稳定性判据,所得出的结论依赖于时间滞后的最大值并且以线性矩阵不等式的形式给出。最后给出一个数值例子来说明所提判据的有效性和可行性。