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1.
本文研究带有时滞脉冲效应的非线性随机微分系统的p阶矩指数稳定性和几乎指数稳定性问题.基于脉冲控制理论和平均脉冲间隔的思想,利用伊藤公式,得到了系统基于Lyapunov理论的p阶矩指数稳定和几乎指数稳定的充分条件.结果表明,时滞脉冲的存在除了破环系统的稳定性外,还可以用来镇定不稳定的连续系统.最后,通过数值例子说明了理论结果的有效性.  相似文献   

2.
研究一类非线性参数扰动满足范数有界条件时多重时滞系统的鲁棒稳定性及其分散鲁棒控制。首先利用Lyapunov函数方法分析系统的鲁棒稳定性,获得一种新的稳定性条件,然后利用标量Lyapunov方程方法讨论系统指数稳定的条件,通过对系统采取分散反馈控制,进一步得到系统可鲁棒镇定和可指数镇定的条件。  相似文献   

3.
    
This paper is concerned with the stability and impulsive stabilization of hybrid impulsive stochastic functional differential systems with delayed impulses. Using the Razumikhin techniques and Lyapunov functions, some sufficient conditions for the pth moment exponential stability of the systems under consideration are established. Based on the derived stability results, impulsive controllers are designed to stabilize a given unstable linear or nonlinear hybrid stochastic delayed differential system. Different from the existing stability and impulsive stabilization results in the literature, the results obtained in this paper shown that the delayed part of impulses can make a contribution to the stability of systems. Three examples are provided to present the effectiveness and advantages of the proposed results.  相似文献   

4.
    
In this paper, we investigate the exponential stability for a class of impulse stochastic differential equations. Different from the previous literature, the impulsive times considered in this paper are random times. By applying stochastic processes theory, stochastic analysis theory and Lyaponov method, we establish several novel exponential stability criteria of the suggested system. Finally, several simple examples are provided to show the validity and significance of the results.  相似文献   

5.
6.
    
This paper is concerned with the exponential stability analysis of stochastic delayed systems with impulsive effects. By using the average impulsive interval approach, and together with comparison lemma and Razumikhin techniques, sufficient conditions ensuring the moment exponential stability of the systems under consideration are established. A stability criterion for non‐delayed stochastic systems with impulses is also derived as a corollary. Compared with the existing stability results in the literature, which are usually based on the supremum or infimum of impulsive intervals, the results reported in this paper are less conservative. Two illustrative examples are provided to validate the effectiveness and advantages of our theoretical results.  相似文献   

7.
针对带有时变有界的不确定参数和状态时滞的线性不确定时滞系统,研究其时滞依赖型具有指定收敛率的鲁棒指数稳定性问题。通过应用Lyapunov-Krasovskii稳定性定理方法,合理建立Krasovskii泛函,利用线性矩阵不等式方法导出了系统鲁棒指数稳定且具有指定收敛率的判据。所得结论采用线性矩阵不等式表示,与时滞参数的导数无关,克服了通常所得结论与时滞导数有关,且要求时滞参数导数小于常数1的限制。应用实例证明了设计方案切实可行。  相似文献   

8.
    
In this paper, we discuss a force control problem for a constrained one-link flexible arm. To solve the force control problem, we propose a simple boundary feedback controller that consists of the bending moment at the root of the flexible arm and its time derivative. The striking point is that information about the force and the rotational angle of the motor is not necessary for the implementation of the controller, and thus we do not need a force sensor or encoder in the construction of the controller. The exponential stability of the closed-loop system is then provided using the energy multiplier method. We describe several experiments carried out to investigate the performance of the proposed controller.  相似文献   

9.
    
This article investigates the exponential stability of nonlinear discrete-time systems with time-varying state delay and delayed impulses, where the delays in impulses are not fixed. Specifically, the study is separated into two cases: (1) stability of delayed discrete-time systems with destabilizing delayed impulses, where the time delays in impulses can be flexible and even larger than the length of the impulsive interval; (2) stability of delayed discrete-time systems with mixed delayed impulses (means stabilizing and destabilizing delayed impulses exist simultaneously), where the time delays in impulses are unfixed between two adjacent impulsive instants. First, the concept of average impulsive delay (AID) is extended to discrete-time systems with delayed impulses. Then, some Lyapunov-based exponential stability criteria are provided for delayed discrete-time systems with delayed impulses, where the impulses satisfy the average impulsive interval (AII) condition and the delays in impulses satisfy the AID condition. For the delayed discrete-time systems with mixed delayed impulses, the exponential stability criterion is provided by limiting the geometric average of the impulses' strengths. The obtained results can be used to study the delayed discrete-time systems with some large impulses which may even be unbounded. It's also shown that the delays in impulses can have a stabilizing effect on the stability of delayed discrete-time systems. Some numerical examples are also provided to illustrate the effectiveness and advantage of the theoretical results.  相似文献   

10.
线性时滞不确定系统的鲁棒稳定控制   总被引:3,自引:0,他引:3       下载免费PDF全文
倪茂林  谌颖 《自动化学报》1996,22(6):727-730
对于线性时滞不确定系统,给出一种鲁棒渐近稳定控制器的设计方法,且对匹配与不匹配两类不确定系统进行了研究.与现有结果相比,按此方法设计的系统不但控制器增益较小,实现方便,而且可以容许较大的系统不确定性.  相似文献   

11.
Lurie滞后反馈控制系统绝对稳定的鲁棒扰动界   总被引:7,自引:0,他引:7  
本文应用Lyapunov方法讨论了具有时滞反馈的Lurie控制系统的鲁棒绝对稳定性,给出了具有一个和多个滞后反馈的Lurie控制系统的绝对鲁棒稳定的充分条件.用本文的结论可直接计算具有时滞反馈的Lurie控制系统绝对稳定的鲁棒扰动上界.文末给出了应用本文结论的例子.  相似文献   

12.
ABSTRACT

In this paper, we are concerned with rapid stabilisation of an Euler--Bernoulli beam with internal delayed control. Herein we introduce a new approach of the feedback control design from the system equivalence point of view. The design approach can be divided into several steps. First, we construct a target system of the desired stability. Second, we select a suitable integral transform that transforms the present system to the target system. In this procedure, one can get a corresponding feedback control. Third, we find a transform that transforms the target system to the present system, which provides the equivalence of both systems. Finally, we prove that the two transforms are bounded linear operators in an appropriate Hilbert space.  相似文献   

13.
In this paper, we introduce a new concept of finite-time stability of linear time-varying singular systems with impulses at fixed times, and present new results for the above-mentioned class of system in the form of sufficient conditions. A sufficient condition is given in terms of matrix inequalities, which gives the opportunity of fitting the finite-time control problem in the general framework via impulsive control. A numerical example is presented to illustrate the efficiency of the proposed result.  相似文献   

14.
针对具有脉冲扰动和变时滞的顾前车辆纵向跟随系统,在假设各孤立子系统指数稳定的前提下,分析了该系统的群指数稳定性与控制.首先利用向量Lyapunov函数法和数学归纳法给出确保该系统群指数稳定的充分条件;然后基于得到的稳定性条件,采用滑模变结构控制策略对脉冲变时滞车辆纵向跟随系统进行控制器设计;最后通过一个数值仿真算例验证了所得结论的正确性以及在实际中如何应用.  相似文献   

15.
    
This paper investigates robust exponential stability for discrete‐time delay impulsive systems with parametric uncertainties. The parametric uncertainties in the systems are assumed to be time varying and norm bounded. Using Lyapunov functionals, some robust exponential stability criteria are given. It is shown that the time interval between the nearest two impulses should be small enough, i.e., impulses must act frequently, when the impulses are employed to stabilize the original impulse‐free system that is not robustly stable. Conversely, when the original system without impulses is robustly stable, the time interval between the nearest two impulses should be large enough to let the system with impulsive perturbations retain its stability property. It should be noted that this is the first time that impulsive robust exponential stabilization results are given via Lyapunov functionals for discrete‐time uncertain delay impulsive systems. Some examples, including an example which cannot be studied by the existing results, are also presented to illustrate the effectiveness of the obtained results.  相似文献   

16.
LURIE控制系统绝对稳定的时滞相关条件   总被引:54,自引:6,他引:54       下载免费PDF全文
年晓红 《自动化学报》1999,25(4):564-566
1引言Lurie型控制系统是一类非常重要的控制系统,关于具有时滞的Lurie型控制系统的绝对稳定性的讨论已有不少结果[1—4],但已有的绝对稳定性条件均与时滞无关,这类结论对系数矩阵的限制比较严格,在某些情况下比较保守.本文将讨论具有一个时滞和多个时...  相似文献   

17.
研究了具有双时滞离散线性系统的稳定性及其在网络控制中的应用。一个具有状态时滞的离散线性系统,假设它的状态信号从输出到控制器的时候,存在两种情况:第一种情况,有两条传播渠道,一条直接输入到控制器,另一条通过网络,网络传播往往会产生时滞;第二种情况是通过网络单渠道传送。基于Lyapunov稳定理论得到双时滞离散线性系统稳定的充分条件。在此基础上通过引入一些新的变量,将得到的条件转化为线性矩阵不等式(LMIs),分别给出了两种情况下控制器的设计。最后给出的三个数值例子说明方法的有效性。  相似文献   

18.
    
In this paper, we investigate the pth moment exponential stability for a class of impulsive stochastic functional differential equations with impulses at random times. The impulsive times considered in this paper are random times that are different from those investigated in the existing literature. By using the stochastic process theory, stochastic analysis theory, Razumikhin technique, and Lyapunov method, we obtain some new criteria of the pth moment exponential stability for the related system. Finally, some examples are provided to show the effectiveness of the theoretical results.  相似文献   

19.
研究了时滞反馈控制作用下铰支柔性梁主参数共振问题.采用多尺度法,从理论上推导了时滞位移反馈控制作用下铰支柔性梁非线性主参数共振,分析了时滞、反馈控制增益,非线性系数等系统参数对系统非线性主参数振动的影响,分析了主参数动力响应随参数变化的规律.结果表明:随着反馈增益的增大,系统响应幅值得到明显抑制,合理地控制系统参数选取可提高振动控制的效率.  相似文献   

20.
考虑由多个时滞系统组成的切换系统,并研究在什么条件下,可以把无时滞切换系统的稳定性分析及结论推广至上述的时滞系统.方法是将时滞项作为线性常微分方程扰动项,利用常数变易公式与Halanay微分不等式,分析时滞项对于切换系统稳定性的影响.结论表明,在时滞项满足某些前提时,切换系统稳定性分析的Lyapunov方法仍然适用.仿真算例验证了方法的有效性.  相似文献   

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