线性多级动态结构大系统的反馈镇定

本文研究一类由Ｎ个子系统组成的具有多级动态结构线性大系统的多级反馈镇定问题，这类系统的多级反馈可镇定性与相应地导出系统分散反馈可镇定性等价。利用这种等价性以及系统本身的结构特征，给出了这类大系统可多级反馈镇定的充分条件。对于给定系统，应用本文的结论判别其多级反馈可镇定性是比较容易的。     

广义互联大系统的渐近稳定与分散镇定

利用Lyapunov函数方法、系统分解法以及矩阵不等式等方法研究一类具有脉冲行为的广义互联大系统的渐近稳定性及分散镇定问题,在子系统正则且零解渐近稳定的条件下,给出广义线性互联大系统的渐近稳定莉定的一个充分条件,并设计适当的反馈律,以实现广义互联大系统的镇定。通过仿真实例说明主要结果。     

一类非线性组合大系统的分散鲁棒镇定

研究一类比较广泛的非线性组合大系统的分散鲁棒镇定问题。给出了检验这类非线性组合大系统可分散鲁棒镇定的条件,该判别条件只     

一类时滞切换大系统的分散控制器设计

考虑一类常数时滞切换大系统的分散状态反馈控制器设计问题。在低维时滞子系统的单个子系统均不能被镇定的情况下,基于凸组合技术和线性矩阵不等式方法,设计出分散控制器和分散切换律,保证闭环系统渐近稳定。仿真结果表明所设计方法的可行性和有效性。     

非线性大系统的分散输出反馈半全局鲁棒镇定

从半全局镇定角度研究非线性大系统的分散输出反馈鲁棒镇定问题．对一类满足新型增长条件的非线性大系统, 给出了分散输出反馈半全局鲁棒镇定控制器的设计方法．对任意给定状态空间的紧子集, 可经此方法设计分散输出反馈控制器, 使受控大系统在原点是渐近稳定的同时吸引域包含指定的紧子集．     

一类具有输入饱和的组合系统的半全局分散镇定

研究具有输入饱和组合系统在分散线性状态反馈控制作用下半全局镇定问题。首先给出饱和函数和M矩阵的定义和性质；然后指出所研究的问题是寻找一个分散状态反馈，使得第i阶闭环子系统和完全闭环系统在给定条件下一致渐近稳定；进而运用M矩阵理论，给出了比较简单的具有输入饱和对称组合系统分散半全局镇定的充分条件。     

时滞随机大系统的分散次优镇定

本文基于Ｒｉｃａａｔｉ矩阵方程、采用Ｌｙａｐｕｎｏｖ泛函研究具有时滞的Ｉｔｏ型随机大系统的分散次优镇定，建立了分散次优镇定的判据，给出了确定分散次优控制器的一个算法，这个算法以求解Ｌｙａｐｕｎｏｖ矩阵方程与Ｒｉｃｃａｔｉ矩阵方程为基础。文中命同了数值算例以说明本文算法的用法。     

一类扩展结构大系统的分散有限时间鲁棒关联镇定

研究一类扩展结构大系统分散有限时间鲁棒关联镇定问题. 扩展结构大系统是在原结构系统上增加新子系统而构成的, 在原系统分散控制律确定不变的情况下, 设计新加入子系统的鲁棒分散控制律, 使扩展后的系统仍能保持有限时间关联稳定. 利用LMI 方法推导此类系统基于状态反馈和输出反馈的分散有限时间关联镇定的充分条件, 并给出扩展子系统的相应控制器的设计方法. 最后通过仿真实验表明了所提出方法的可行性和有效性.

     

一类非线性互联大系统的分散镇定

本文研究一类非线性互联大系统的局部分散状态反馈镇定问题。文中将非线性系统的几何方法和分析方法有机地结合起来，用于研究这类非线性互联大系统的分散镇定问题的可解性，并且得到了较弱的充分条件，最后用一个例子对本文的主要结果做进一步的说明。     

线性滞后互联大系统的分散智能镇定

讨论了线性滞后互联大系统的分散镇定问题,给出了分散镇定控制器设计的思想 和方法,而后将人工神经网络技术引入该研究领域,给出了一般线性定常系统闭环极点配置 的智能方法,同时实现了线性滞后互联大系统分散镇定控制器的智能设计.最后给出了一数 值仿真例子,进而验证了该设计方法的可行性及有效性.     

Robust synchronization of linear dynamical networks with compensation of disturbances

The problem of robust synchronization of a network of interconnected dynamical subsystems with a leader is considered. Each local subsystem of network is described by a linear time‐varying parametrically and functionally uncertain differential equation. Only scalar inputs and outputs of local subsystems are supposed to be measured. A simple decentralized controller ensuring the tracking of the local subsystems by the leader under matching conditions is designed. The method is illustrated by an example, synchronization of the network with four nodes. Copyright © 2013 John Wiley & Sons, Ltd.     

On decentralized stabilization of interconnected systems

A decentralized control scheme is proposed for stabilization of interconnected systems consisting of arbitrarily connected, linear, time-invariant multivariable subsystems. Sufficient conditions are given for an interconnected system to be stabilized using only local state feedback. The obtained results are illustrated by an example.     

特殊的分散控制问题

主要研究一类特殊的分散控制问题,给出其可静态分散镇定的条件,并指出在一些情形下,不可能分散镇定整个系统的同时使各子系统也都稳定,也就是说,整个系统要达到分散镇定的结果,必须把部分子系统配置到不稳定状态.结果表明关联系统的稳定性有时主要依赖于子系统的协调性,不一定依赖于子系统的稳定性强度.     

Resilient decentralized stabilization of interconnected time‐delay systems with polytopic uncertainties

Decentralized delay‐dependent local stability and resilient feedback stabilization methods are developed for a class of linear interconnected continuous‐time systems. The subsystems are time‐delay plants which are subjected to convex‐bounded parametric uncertainties and additive feedback gain perturbations while allowing time‐varying delays to occur within the local subsystems and across the interconnections. The delay‐dependent local stability conditions are established at the subsystem level through the construction of appropriate Lyapunov–Krasovskii functional. We characterize decentralized linear matrix inequalities (LMIs)‐based delay‐dependent stability conditions by deploying an injection procedure such that every local subsystem is delay‐dependent robustly asymptotically stable with an γ‐level ??₂‐gain. Resilient decentralized state‐feedback stabilization schemes are designed, which takes into account additive gain perturbations such that the family of closed‐loop feedback subsystems enjoys the delay‐dependent asymptotic stability with a prescribed γ‐level ??₂‐gain for each subsystem. The decentralized feedback gains are determined by convex optimization over LMIs. All the developed results are tested on representative examples. Copyright © 2010 John Wiley & Sons, Ltd.     

Characterizations of decentralized fixed modes for interconnected systems

A study of the characterization of decentralized fixed modes for large-scale interconnected systems is made. This is done by obtaining a recursive characterization of decentralized fixed modes, in which the existence of fixed modes of a ν-control agent system is expressed in terms of the existence of fixed modes of ν ? 1 control agent systems. An interpretation of these conditions is then made in the frequency domain. Simple conditions, in terms of the controllability of the system's subsystems, are then found for a composite system consisting of ν interconnected subsystems to have no decentralized fixed modes. This result clarifies some recent discussion on the fixed modes of interconnected systems; in particular, it proves that Fessas's conjecture is true for systems with two control agents, but false for systems with more than two control agents.     

不确定内联系统的二次稳定性和分散反馈镇定

文中首先讨论了系统x(t)={A0+k∑i=1DiFi(t)Ei}x(t)的二次稳定性,给出以H∞小 增益条件表示的该系统是二次稳定的充分必要条件.然后讨论了一类不确定内联系统的二次 稳定性和分散反馈镇定问题,给出用"集结"后的子系统的一组H∞小增益条件表示的不确定 内联系统二次稳定和可分散反馈镇定的充分条件.分散控制可通过求一组子系统阶数的Riccati 不等式得到.     

时滞随机子系统关联大系统的分散镇定

本文研究了系统内部与关联项中均含有时滞与随机噪声激励的大系统的分散镇定,得到大系统由局部控制器分散镇定的充分条件,给出分散控制器设计的算法ＤＤＣ,用异步迭代法求解Ｒｉｃｃａｔｉ联立矩阵方程组,从而求得系统的分散控制器。     

Distributed Control of Multiple-Bus Microgrid With Paralleled Distributed Generators

A microgrid is hard to control due to its reduced inertia and increased uncertainties. To overcome the challenges of microgrid control, advanced controllers need to be developed. In this paper, a distributed, two-level, communication-economic control scheme is presented for multiple-bus microgrids with each bus having multiple distributed generators (DGs) connected in parallel. The control objective of the upper level is to calculate the voltage references for one-bus subsystems. The objectives of the lower control level are to make the subsystems' bus voltages track the voltage references and to enhance load current sharing accuracy among the local DGs. Firstly, a distributed consensus-based power sharing algorithm is introduced to determine the power generations of the subsystems. Secondly, a discrete-time droop equation is used to adjust subsystem frequencies for voltage reference calculations. Finally, a Lyapunov-based decentralized control algorithm is designed for bus voltage regulation and proportional load current sharing. Extensive simulation studies with microgrid models of different levels of detail are performed to demonstrate the merits of the proposed control scheme.      

一类带有非匹配不确定性的非线性组合系统的按指数镇定

本文讨论一类带有非匹配不确定性的非线性大系统的按指数镇定，在标称系统是按指数稳定且非匹配不确定性为等效匹配的假设条件下提出了两种鲁棒控制算法，分散控制仅利用每个子系统的状态作为反馈信息，而双层控制使用每个子系统及相关子系统的状态，最后用一个说明性的例子来说明本文所提出方法的可用性。