具滞后的区间Lurie型系统的鲁棒绝对稳定性

讨论了具滞后的区间非线性Lurie型控制系统的鲁棒绝对稳定性。用区间向量不等式、Lyapunov函数法和Riccati方程法研究了具滞后的区间Lurie型直接控制系统和具滞后的区间Lurie型间接控制系统的鲁棒绝对稳定性，得到了具滞后的区间非线性Lurie型控制系统鲁棒绝对稳定的一些充分条件，并给出了数值例子说明本文结论的有效性。     

Improved delay-dependent stability criteria for systems with interval delay

This paper deals with the problem of stability for systems with delay varying in an interval.A new Lyapunov functional,which makes use of the information of both the lower and upper bounds of the interval time-varying delay,is proposed to derive some new stability criteria.Furthermore,the relationship of the time-varying delay and its lower bound and upper bound is taken into account.As a result,some less conservative delay-dependent stability criteria are obtained without ignoring any useful information in the derivative of Lyapunov functional,which are established in the forms of linear matrix inequalities.Numerical examples are provided to show that the obtained results are better than existing ones.     

区间变时滞不确定系统鲁棒稳定性分析

研究了一类线性区间变时滞不确定系统鲁棒稳定性问题。基于新型的时滞分割法和交互式凸组合技术,借助于构造包含四重积分项的新Lyapunov Krasovskii泛函,并利用新的积分不等式界定方法给出了线性矩阵不等式形式的时滞相关稳定性判据。与已有文献相比,该判据扩大了保证系统稳定的最大时滞上界范围,在降低结论的保守性和提高计算效率两者间达到了一个很好的平衡。最后通过3个具有代表性的数值例子对比验证了该方法在降低结论保守性方面的优越性。     

区间时滞相关不确定奇异系统的鲁棒稳定性和镇定性

研究区间时滞相关的不确定时变时滞奇异系统的鲁棒稳定性和镇定性问题,不确定参数假设是范数有界的。充分利用时滞的下界信息构造Lyapunov函数,用严格的矩阵不等式给出系统对所有的容许不确定满足正则、无脉冲、稳定的新判据。基于这个判据,设计状态反馈控制器使得系统鲁棒稳定。数值例子说明所得结果具有更小的保守性。     

不确定中立型系统的改进的时滞依赖的鲁棒镇定

研究了具有时不变不确定性的中立型系统的鲁棒镇定/稳定问题。给出了新的镇定/稳定法则。利用改进的Lyapunov泛函,得到了这类系统基于线性矩阵不等式的保守性较低的镇定/稳定条件。最后,用几个例子证明了本文所得到的结果要比现存的结果得到了提高。     

Mean-square exponential stability for stochastic time-varying delay systems with Markovian jumping parameters: a delay decomposition approach

The mean-square exponential stability problem is investigated for a class of stochastic time-varying delay systems with Markovian jumping parameters.By decomposing the delay interval into multiple equidistant subintervals,a new delay-dependent and decay-rate-dependent criterion is presented based on constructing a novel Lyapunov functional and employing stochastic analysis technique.Besides,the decay rate has no conventional constraint and can be selected according to different practical conditions.Finally,two numerical examples are provided to show that the obtained result has less conservatism than some existing ones in the literature.     

具有时滞的区间大系统的鲁棒稳定性

应用Lyapunov函数方法讨论了具有时滞的区间大系统的鲁棒稳定性,给出了该系统鲁棒稳定的充分条件,同时还讨论了一类不确定时滞大系统的鲁棒稳定性,最后给出了结果的示例并与前人的结果进行了比较。     

不确定时滞系统的二次稳定无记忆变结构控制

根据变结构控制 ( VSC)方法及 Lyapunov稳定性理论研究一类不确定性时滞系统的无记忆变结构控制问题 ,所得的变结构控制器保证了切换函数的二次稳定性 ,并避免控制信息号颤振 .此外 ,还推出了一种具有不确定性范数上界自适应估计器的自适应变结构控制器 .仿真结果验证了所得结果的有效性和合理性.     

STABILITY ANALYSIS FOR THE LARGE-SCALE SYSTEMS WITH TIME-DELAY

The stability analysis problems were put forward for the large-scale systems with time-delayby using the partial decomposition method.With the stability of the isolated subsystems without time-delay,some sufficient criterions for the asymptotical stability of the whole system were obtained bymaking a Lyapunov function with the Razumikhin condition and a Lyapunov functional for the retardedtype and neutral type,respectively.     

Delay-dependent stability and stabilization of a class of linear switched time-varying delay systems

The stability and stabilization of a class of linear switched time-varying delay systems are investigated. A piecewise quadratic Lyapunov function (PWQLF) is constructed and is used to obtain the stability conditions based on the linear matrix inequalities (LMIs). The stabilizing controller for this class of system is then designed and the solution of the desired controller can be obtained by a cone complementary linearization algorithm. Numerical examples are provided to illustrate the less conservativeness of the new stability and the validity of the controller design procedures.     

Study on Robust Uniform Asymptotical Stability for Uncertain Linear Impulsive Delay Systems

In the area of control theory the time-delay systems have been investigated. It's well known that delays often result in instability, therefore, stability analysis of time-delay systems is an important subject in control theory. As a result, many criteria for testing the stability of linear time-delay systems have been proposed. Significant progress has been made in the theory of impulsive systems and impulsive delay systems in recent years. However, the corresponding theory     

Global Exponential Stability of Variable Delay and Time－varying Measure Differential Systems with Impulse Effect

ＧｌｏｂａｌＥｘｐｏｎｅｎｔｉａｌＳｔａｂｉｌｉｔｙｏｆＶａｒｉａｂｌｅＤｅｌａｙａｎｄＴｉｍｅ－ｖａｒｙｉｎｇＭｅａｓｕｒｅＤｉｆｆｅｒｅｎｔｉａｌＳｙｓｔｅｍｓｗｉｔｈＩｍｐｕｌｓｅＥｆｆｅｃｔＧＵＡＮＺｈｉｈｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＢａ...     

Stability of discrete Hopfield neural networks with delay

1.INTRODUCTION DiscreteHopfieldneuralnetwork(DHNN)isoneof thefamousneuralnetworkswithawiderangeofap plications,suchascontentaddressablememory,pat ternrecognition,andcombinatorialoptimiza tion[1～5].ThestabilityofDHNNmeansthatevery trajectorymustconvergetowardsanequilibrium point,oralimitcycle.Becausethestabilityof DHNNisthefoundationofthenetwork’sapplica tionsandisthemostbasicandimportantproblem,thestabilityanalysisoftheDHNNhasattractedcon siderableinterest.Manyresearchershavefocu…     

一类非线性切换系统基于观测器的稳定性分析

针对在实际工程系统中状态不可观测的困难,考虑了同时包含李普希兹非线性干扰项和不确定项的切换系统的稳定性问题.在一定的假设条件下,讨论了系统的滑模观测器.在不确定项满足匹配条件的情况下,基于滑模观测器的设计,利用多李亚普诺夫函数方法得到了保证误差切换系统渐近稳定的充分条件,所设计的滑模观测器成为切换系统的渐近稳定的观测器.这为非线性切换系统利用观测器进行稳定性分析提供了一个新视角.最后通过仿真算例验证了所提方案的正确有效性.     

Robust stability analysis of uncertain discrete-time systems with state delay

The sufficient conditions of stability for uncertain discrete-time systems with state delay have been proposed by some researchers in the past few years, yet these results may be conservative in application. The stability analysis of these systems is discussed, and the necessary and sufficient condition of stability is derived by method other than constructing Lyapunov function and solving Riccati inequality. The root locations of system characteristic polynomial, which is obtained by augmentation approach and Laplace expansion, determine the stability of uncertain discrete-time systems with state delay, the system is stable if and only if all roots lie within the unit circle. In order to analyze robust stability of system characteristic polynomial effectively, Kharitonov theorem and edge theorem are applied. Example shows the practicability of these methods.     

T-S模糊系统的鲁棒局部稳定

研究一类不确定T-S模糊系统的鲁棒局部稳定及鲁棒局部镇定问题。首先给出T-S模糊系统局部稳定的定义,并利用一种非二次Lyapunov函数得到T-S模糊系统鲁棒局部稳定的充分条件,然后给出一种新的非PDC控制器,进而利用非二次Lyapunov函数得到基于这种非PDC控制器的局部鲁棒镇定控制器设计方法。该方法基于线性矩阵不等式(LMI),结构简单,且具有较低的保守性。仿真算例证明了所提方法的可行性。     

离散模糊时滞系统的鲁棒LQ/H∞非脆弱控制

针对一类由T-S模糊模型描述的不确定离散非线性时滞系统,讨论其在控制器存在可加性摄动情形下的鲁棒LQ/H_∞非脆弱控制问题。通过构造适当的Lyapunov函数,给出以线性矩阵不等式形式表示的系统时滞依赖稳定的充分条件以及相应的鲁棒LQ/H_∞非脆弱控制器设计方法。数值仿真表明,所构造的控制器不仅能够保证闭环模糊时滞系统的鲁棒渐近稳定性,还能使系统达到一定的H_∞干扰抑制水平。     

一种时滞相关非脆弱模糊控制器的设计

研究了一类带有时变时滞的离散模糊双线性系统的时滞相关非脆弱控制问题。引入自由权值矩阵并定义一种新型的Lyapunov函数,在控制器存在加性不确定的情况下,得到了保守性小的时滞相关渐近稳定的充分条件。通过附加矩阵,将所得到的稳定条件转换为线性矩阵不等式(linear matrix inequality, LMI)形式,非脆弱控制器可由LMI的解得到。数例仿真验证了该方法的有效性。     

Design of unknown input observer with H∞ performance for linear time-delay systems

A unknown input observer (UIO) design for a class of linear time-delay systems when the observer error can't completely decouple from unknown input is dealt with. A sufficient condition to its existence is presented based on Lyapunov stability method. Design problem of the proposed observer is formulated in term of linear matrix inequalities. Two design problems of the observer with internal delay and without internal delay are formulated. Based on H∞ control theory in time-delay systems, the proposed observer is designed in term of linear matrix inequalities (LMI). A design algorithm is proposed. The effective of the proposed approach is illustrated by a numerical example.     

时变时滞统一混沌系统的脉冲同步控制

对参数不确定时变时滞统一混沌系统的脉冲同步控制问题进行了理论分析,利用脉冲控制方法、 李雅普诺夫稳定理论和矩阵不等式技术,给出了在驱动系统和响应系统的时滞不相同时, 其脉冲一致渐近同步的充分条件,并由此设计了一个与时滞和初值有关的脉冲控制器. 最后,通过数值示例仿真对所得结果进行了验证.