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1.
文章考虑时变时滞的中立型Lurie系统的绝对稳定性问题。系统的中立时滞是常时滞,离散时滞是变时滞,系统的变时滞上界为一个未知的常数。在无限的扇形区间条件下,将变时滞区间划分成小的片段。通过利用Lyapunov-Krasovskii函数引入自由权矩阵的方法,并进行时滞分解,从而得到使系统绝对稳定的充分条件。最后给出数值算例,证实算法的有效性。  相似文献   

2.
研究区间时变时滞系统的稳定性问题。首先,通过引入一个区间调节参数,将系统时滞区间分解为两部分之和。其次,在两个子区间的基础上构造一个包含更多时滞信息和三重积分项的新Lyapunov-Krasovskii (L-K)泛函。在处理来自L-K泛函求导过程中产生的积分交叉项时,将时滞分属于各子区间的情况作为一个整体来研究。然后,基于Lyapunov稳定性理论,以线性矩阵不等式的形式给出一个新的稳定性准则。最后,通过两个数例证明所得稳定性准则的有效性。  相似文献   

3.
具有时滞的线性区间系统的鲁棒稳定性   总被引:5,自引:0,他引:5  
本文给出了线性区间时滞系统鲁棒稳定性的一些结果,这些结果推广和改进了前人关于线性时滞系统鲁棒稳定性的相关结论,同时还讨论了线性区间时滞系统的稳定度,最后讨论了线性区间时滞大系统的鲁棒稳定性.  相似文献   

4.
刘健辰  时光 《控制与决策》2017,32(10):1824-1830
基于推广的概率分布区间分解法,研究一类具有随机时滞系统的概率分布相关稳定性问题.充分利用随机时滞的概率分布信息,获得一系列稳定性判据;通过严格的数学证明,表明通过增加概率区间数可以逐渐降低稳定性判据的保守性,从而建立一组新的分层结构LMI条件;严格证明了在采用相同概率区间划分的条件下,所得到的稳定性判据的保守性低于不考虑时滞概率分布的时变时滞分解法所得到的结果,并且分析和比较了两种方法的计算量.  相似文献   

5.
研究了一类含有时变时滞的神经网络无源分析问题。通过将时滞区间分解为两个子区间和构造新颖的Lyapunov泛函,得到了基于LMIs(线性矩阵不等式)形式的时滞相关无源的新准则。这个新准则推广了一些已有的结果,并且具有更少的保守性。最后,数值例子和仿真验证了结论的有效性。  相似文献   

6.
具有时滞的线性区间系统的鲁棒稳定性   总被引:3,自引:1,他引:3  
本文给出了线性区间时滞系统鲁棒稳定性的一些结果,这些结果推广和是了前人关于线性时滞系统鲁棒稳定性的相关结论,同时还讨论了线性区间时滞系统的稳定度,最后讨论了线性区间时滞大系统的鲁棒稳定性。  相似文献   

7.
针对一类时滞是时变的且属于一个已知区间的线性系统,利用Lyapunov-Krasovskii泛函方法,结合积分不等式方法,以线性矩阵不等式的形式,给出了区间时滞线性系统的时滞相关鲁棒稳定性准则,并设计了非脆弱鲁棒控制器。数值算例表明,所得结论是有效的,具有更低的保守性。  相似文献   

8.
带有时滞的区间动力系统的鲁棒稳定性研究   总被引:2,自引:1,他引:1  
给出了区间动力系统稳定性的相关概念,讨论了带有时滞的区间动力系统的鲁棒稳定性.通过构造控制矩阵和迭代相结合的方法,给出了一类带有时滞的区间动力系统鲁棒稳定的判别方法,并且给出了系统鲁棒稳定时参数取值的最大区间.将含有时滞的区间动力系统的稳定性转化为判别一个矩阵的稳定性,推广和改进了已有的结论.  相似文献   

9.
张宝琳  唐功友 《控制与决策》2007,22(11):1245-1249
研究一类受扰奇异摄动时滞组合大系统的近似最优控制问题.基于奇异摄动的快慢分解理论.将原组合大系统的最优控制问题分解为组合线性快优化子问题和降阶的受扰时滞组合慢优化子问题.通过采用前馈补偿方法抑制外部扰动,采用参数摄动法求解组合慢优化子问题,得到了系统的前馈反馈组合(FFCC)控制律.通过引入降维扰动观测器解决了FFCC律的物理可实现问题.仿真算例验证了所提出方法的有效性.  相似文献   

10.
研究了带有非线性扰动的时变时滞系统的稳定性问题.基于时滞分割方法,提出了保守性更小的系统稳定性分析准则.利用一个自由参数将时滞区间分割为2个子区间,进而构造了含有时滞分割点状态信息和3重积分项的Lyapunov-Krasovskii泛函,并采用自由矩阵积分不等式界定泛函导数中的交叉项.基于Lyapunov稳定性定理,得到了以线性矩阵不等式描述的时滞相关型稳定性准则.数值算例表明该稳定性准则能够得到更大的时滞上界,与已有结果相比具有更小的保守性.  相似文献   

11.
This paper concerns the stability analysis for singular systems with time-varying delay and nonlinear perturbations. Two cases of time-varying delay, which is differentiable (Case 1) or not differentiable (Case 2), are considered. The considered nonlinear perturbations includes the norm-bounded uncertainties as a special case. Some delay-dependent stability criteria are derived by using a delay decomposition approach. In the delay decomposition approach, the entire delay interval is divided into multiple sub-intervals for which different energy functions are defined for building new Lyapunov–Krasovskii functional. Some numerical and practical examples are given to show the effectiveness and significant improvement of the proposed method.  相似文献   

12.
利用时滞分解和平均驻留时间方法讨论一类时滞切换系统的稳定性问题.定义了更为一般的Lyapunov函数,结合Jensen积分不等式和倒数凸组合技术得到的线性矩阵不等式条件具有更小的保守性和更低的计算复杂性给出的仿真算例进一步验证了所得结果的有效性.  相似文献   

13.
This paper deals with delay-dependent stochastic stability and bounded real lemma(BRL)for Markovian jump linear systems with interval time-varying delays.By constructing some new Lyapunov functionals and using the Jensen’s integral inequality method,the free weighting matrix method,the convex combination method and the delay decomposition approach integratedly,some less conservative delay-dependent stability criteria and BRL are established. Numerical examples are given to show the effectiveness of the proposed method.  相似文献   

14.
This paper is concerned with exponential stability of a class of integral delay systems with a prescribed decay rate. First, by carefully exploring the literature on this topic, a delay decomposition approach is established to reduce the conservatism in the existing sufficient conditions by constructing new Lyapunov–Krasovskii (LK) functionals. It is proven that the proposed sufficient conditions are less conservative than a recently established set of sufficient conditions. Second, by analyzing the characteristic equation of the considered integral delay system, necessary and sufficient conditions for the stability are obtained by computing the right-most zeros of a certain auxiliary point-delay linear system, for which stability criteria that are easy to test are also established based on this method. Numerical examples illustrate the effectiveness of the obtained results.  相似文献   

15.
This paper studies the problem of stability analysis for continuous‐time systems with time‐varying delay. By developing a delay decomposition approach, the information of the delayed plant states can be taken into full consideration, and new delay‐dependent sufficient stability criteria are obtained in terms of linear matrix inequalities. The merits of the proposed results lie in their less conservatism, which are realized by choosing different Lyapunov matrices in the decomposed integral intervals and estimating the upper bound of some cross term more exactly. Numerical examples are given to illustrate the effectiveness and less conservatism of the proposed method. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

16.
In this paper, the Takagi–Sugeno (T–S) fuzzy model representation is extended to the stability analysis for cellular neural networks (CNNs) with mixed time-varying delays and time delay in the leakage term via the delay decomposition approach. First, a sufficient condition is given to ensure the existence and uniqueness of equilibrium point by using topological degree theory. Then, we present global asymptotic stability of equilibrium point by using linear matrix inequality (LMI) approach and by constructing an augmented Lyapunov–Krasovskii functional (ALKF) together with convex combination method. The proposed results can be easily solved by some standard numerical packages. Finally, four numerical examples are given to demonstrate the effectiveness and conservativeness of our proposed results.  相似文献   

17.
讨论一类具有扇区非线性的时变时滞系统的绝对稳定性问题.基于时滞分段的思想,构造一种新的Lyapunov 泛函,进一步应用自由权矩阵结合积分不等式方法,并充分考虑时变时滞和时滞上界之间的关系,得到了基于LMI的具有更低保守性的时滞相关绝对稳定条件.最后,数值实例表明所提方法的有效性和相比已有结果的优越性.  相似文献   

18.
张红强  刘健辰 《控制与决策》2011,26(10):1596-1600
基于二次分离方法研究时变时滞系统的时滞相关稳定性问题.通过引入更为严格的积分二次约束,取得保守性更小的稳定性判据.借鉴时变时滞分解思想,提出基于线性矩阵不等式的改进的稳定性判据.数值算例表明了所提出方法的有效性.  相似文献   

19.
The stability of nonlinear cascade systems with a time delay is studied. Conditions of the global asymptotic stability in terms of linear matrix inequalities for a finite set of matrices are obtained. The problem of stabilization of the controlled delay system is considered, which is solved based on the stability conditions. The proposed approach to the analysis of qualitative properties and to the solution of stabilization problems is based on the results concerning the asymptotic stability of the delay linear systems, the decomposition of the original system, and the representation of the delay nonlinear system by a Takagi–Sugeno system. Examples illustrating the simplification of the system analysis by reducing its size and decreasing the number of linear matrix inequalities are discussed.  相似文献   

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