一类线性开头系统的渐近稳定性

研究一类线性开关系统的渐近稳定性问题。针对不满足完备性条件的开关系统，利用Lya-punov函数技术，给出了系统渐进稳定的一个充分条件，并举例说明了该方法的实际应用。     

具有m个开关系统的渐近稳定性

研究了一类具有m个开关系统的渐近稳定性,借助于多重Lyapunov函数,给出了该系统全局渐近稳定的充分条件,部分地改进了前人的结果。     

初始状态为正交的二维线性正系统的渐近稳定性

本文分析了初始状态为正交的二维线性正系统的渐近稳定性. 与一维系统不同, 初始状态为正交的二维系统的稳定性严格依赖于合适的初始条件. 首先, 当初始状态 绝对收敛时, 二维正FM I 模型的渐近稳定性判据被提出. 然后, 针对二维正Rosser模型, 在初始状态 绝对收敛时, 相似的结论被给出. 最后, 两个数字实例证实了这些判据的有效性.     

2-D奇异线性离散系统渐近稳定性的一类Lyapunov 方法

引入2－D奇异一般离散状态空间模型的Lyapunov方程,探讨了该模型的渐近稳定性、特征多项式的根式以及2－D Lyapunov矩阵方程间的关系,给出了系统渐近稳定性的充分条件。     

一类离散切换系统的渐近稳定性

利用多Lyapunov函数, 研究了一类由m个离散子系统构成的切换系统的渐近稳定性, 给出了该系统全局渐近稳定的两个充分条件. 仿真结果表明文中的结论是有效的.     

离散线性开关系统切换的模糊方法

在已知离散线性开关系统全局渐近稳定前提下，将线性开关系统切换问题转化为相应T－S模型模糊区域划分问题，通过在线实时调整T－S模型隶属函数参数来确定模糊区域，以二阶离散线性开关系统为例，给出了实现系统全局渐近稳定的模糊切换策略，该方法可扩展到高阶线性开关系统，计算机仿真证实该方法简捷，有效。     

具有有界控制输入线性多变量系统的渐近稳定性

基于连续时间系统向量比较定理,本文针对状态反馈控制器,带有观测器的状态反馈控制器和动态输出反馈控制器三种情况给出了控制输入有界时控制系统闭环渐近稳定性判据。     

线性切换系统经周期切换渐近稳定性研究

研究一类含有两个子系统的线性切换系统经周期切换渐近稳定问题.首先给出了特殊周期切换,即等时切换下线性切换系统渐近稳定的充要条件;然后将所得结论进行了推广,使之适合于一般的周期切换情形,并结合自适应思想提出了实现系统周期切换的方法,使之能应用于工程实际.特别指出,一个系统可经切换达到二次稳定的充要条件是该系统可经周期切换渐近稳定.对于一类线性切换系统,采用周期切换可使切换信号的设计变得相对简单.仿真结果表明了所提出的方法简洁而有效.     

一类开关系统的开关控制策略优化设计

对一类基于线性系统模型的开关系统,提出了一种新的开关控制策略优化设计,加快了整个系统的收敛速度,对整个开关系统的稳定性进行了分析.定义了系统对给定初值的运动轨迹在区间上的衰减速率,进而分析了整个系统的收敛性.最后给出了一个仿真例子以说明所给控制策略的有效性.     

Finite-time stability and stabilisation for switched linear systems

In this article, the finite-time stability analysis and stabilisation for switched continuous linear system are addressed. Several sufficient conditions for finite-time boundness and stability of switched system are proposed in this article. By comparing the proposed results, it is shown that more the information about the switching signal is known, less conservative results can be derived. Then, based on the finite-time stability analysis results, static state and dynamic output feedback controllers are designed to finite-time stabilise switched linear systems. Several numerical examples are given to illustrate the proposed results within this article.     

切换线性时滞系统的稳定性判据

考虑了一类切换线性时滞系统的稳定性问题.基于Lyapunov函数方法和矩阵测度的概念,分别给出了切换系统时滞独立以及时滞依赖的渐近稳定性和指数稳定性判据,设计了相应的镇定切换律.最后,通过数值算例验证了所提算法的正确有效性.     

一类线性切换系统具有H∞性能指标的二次稳定

研究了一类线性切换系统具有H_∞扰动衰减度二次稳定问题.这类线性切换系统由两个子系统组成,并且每个子系统都不是具有H_∞扰动衰减度二次稳定的.利用单Lyapunov函数方法,得到了线性切换系统具有H_∞扰动衰减度二次稳定的充分条件,同时由凸组合系统设计出确保线性切换系统二次稳定且具有H_∞扰动衰减度的切换律.进一步,还给出了线性切换系统具有H_∞扰动衰减度二次稳定的必要条件.最后的仿真实例表明了结论的有效性.     

Componentwise stability of linear systems: a non-symmetrical case

In this paper, we present an extension of the concept of componentwise asymptotic (exponential) stability of linear systems in the non-symmetrical case. The main motivation for these results is the need for a more detailed evaluation of the dynamical behaviour of linear systems in electrical engineering and biology. Necessary and sufficient conditions for componentwise asymptotic (exponential) stability in the non-symmetrical case are given. The symmetrical case is obtained as a particular case. © 1997 by John Wiley & Sons, Ltd.     

Periodically switched stability induces exponential stability of discrete-time linear switched systems in the sense of Markovian probabilities

The conjecture that periodically switched stability implies absolute asymptotic stability of random infinite products of a finite set of square matrices, has recently been disproved under the guise of the finiteness conjecture. In this paper, we show that this conjecture holds in terms of Markovian probabilities. More specifically, let S_k∈C^n×n,1≤k≤K, be arbitrarily given K matrices and , where n,K≥2. Then we study the exponential stability of the following discrete-time switched dynamics S: where can be an arbitrary switching sequence.For a probability row-vector and an irreducible Markov transition matrix with , we denote by the Markovian probability on corresponding to . By using symbolic dynamics and ergodic-theoretic approaches, we show that, if S possesses the periodically switched stability then, (i) it is exponentially stable -almost surely; (ii) the set of stable switching sequences has the same Hausdorff dimension as . Thus, the periodically switched stability of a discrete-time linear switched dynamics implies that the system is exponentially stable for “almost” all switching sequences.     

切换线性系统的聚合优化

分析了切换线性系统的稳定性和优化问题,提出了一个Armijo步长优化的共轭梯度算法来寻找适当代价函数下的优化切换时间点集.为了确保优化切换路径是可压缩的,提出了代价函数需要满足的受限表达式.设计了几种优化分段状态反馈切换律来搜索聚合系统的最优切换路径,同时这些切换路径就是对应原始切换线性系统的次优化切换路径.最后,一个实例演示了不同切换律下的切换策略和优化代价.     

Finite‐time stability of switched positive linear systems

This brief paper addresses the finite‐time stability problem of switched positive linear systems. First, the concept of finite‐time stability is extended to positive linear systems and switched positive linear systems. Then, by using the state transition matrix of the system and copositive Lyapunov function, we present a necessary and sufficient condition and a sufficient condition for finite‐time stability of positive linear systems. Furthermore, two sufficient conditions for finite‐time stability of switched positive linear systems are given by using the common copositive Lyapunov function and multiple copositive Lyapunov functions, a class of switching signals with average dwell time is designed to stabilize the system, and a computational method for vector functions used to construct the Lyapunov function of systems is proposed. Finally, a concrete application is provided to demonstrate the effectiveness of the proposed method. Copyright © 2012 John Wiley & Sons, Ltd.