马尔科夫切换拓扑下带有非一致时变时滞的多智能体系统的H_∞领导跟随一致性问题

研究马尔科夫切换拓扑下带有非一致时变时滞的多智能体系统的H_∞领导跟随一致性问题.通过一个模型变换,把原系统的领导跟随一致性问题转化为新的误差系统的均方稳定性问题.根据马尔科夫时滞系统的稳定性理论,以线性矩阵不等式的形式给出了多智能体系统实现领导跟随一致且具有给定的H_∞性能指标的充分条件.最后,仿真实例验证了理论结果的有效性.     

具有时变时滞多智能体系统二分一致性

针对具有时变时滞的多智能体系统二分一致性问题,设计出相应的一致性协议.进一步,通过规范变换和状态变换将二分一致性问题转化为相应的稳定性问题.构造LyapunovKrasovskii泛函,利用线性矩阵不等式(LMI)理论并结合自由矩阵的方法得到多智能体系统达到二分一致的充分条件.对于固定拓扑和切换拓扑情形均进行了研究,当系统具有切换拓扑时,利用平均驻留时间方法分析得到保证系统二分一致性成立的充分条件.最后,利用仿真实例说明所得结果的有效性.     

基于事件触发策略的多智能体系统的最优主-从一致性分析

研究了具有领导者的线性多智能体系统的主 从一致性问题.借助各智能体间的通讯拓扑所构成的无向图,提出一种基于事件触发的自适应动态规划方法,并使用神经网络的逼近性质设计出了近似最优控制.利用Lyapunov稳定性定理,分析了多智能体误差系统的稳定性,并找到一个该误差系统最终有界的充分条件.数值仿真结果进一步验证了理论分析的有效性.     

高阶离散时间多智能体系统的量化一致性

研究高阶线性多智能体系统在有向量化链路信息拓扑下的一致性问题,首先提出了包含智能体自身与其邻居量化信息的线性一致性协议,其次利用提出的线性变换,将一致性问题转化为稳定性问题,基于稳定性理论,得到基于矩阵Schur稳定性的充要条件,并得到依赖于信息拓扑、系统动态和整个系统初始状态的一致性函数,最后,通过求解代数Riccati不等式,提出增益矩阵的设计过程.     

具有非对称通信时滞和切换拓扑的高阶多智能体系统的一致性

研究具有切换有向拓扑和非对称时变时滞的高阶多智能体系统的一致性问题.通过引入正交线性变换和Lyapunov-Krasovskii泛函方法,依据线性矩阵不等式给出了系统解决一致性问题的充分条件以及可容许时变时滞的上界估计.其主要贡献是基于Lyapunov方程和代数不等式建立了协议参数的显性设计,该参数设计形式简单且易于计算,并保证了所给充分条件中线性矩阵不等式的可解性,使得高阶多智能体系统的一致性在切换有向拓扑下对非对称时变时滞是鲁棒的.     

随机切换拓扑下具有区间时变时滞的二阶离散多智能体系统的均方包含控制

研究随机切换拓扑下具有区间时变时滞的二阶离散多智能体系统的均方包含控制问题.通过一个变量变换,把原系统的均方包含控制问题转化为新系统的均方稳定性问题.根据随机稳定性理论和线性矩阵不等式的方法,给出了多智能体系统解决均方包含控制的充分条件.最后,仿真实例验证了理论结果的有效性.     

一阶多智能体系统的一致性分析

研究一阶连续多智能体系统的一致性问题,其中每个智能体只能在一系列离散时刻上获得其相对邻居的状态信息,并且每个智能体的保持器的周期和采样器的周期是不同的.通过分析多智能体系统的稳定性,获得了一致性成立的充要条件,该条件揭示了交流拓扑、控制器增益、采样器的周期和保持器的周期的关系.最后,提供一个仿真例子以说明理论结果的有效性.     

基于平均理论的高阶线性多智能体系统在切换拓扑下的趋同控制问题综述

近年来,高阶线性多智能体系统的趋同控制引起了国内外学者极大的关注.目前这方面的研究主要集中在固定拓扑下的趋同控制,切换拓扑下的结论相对较少.平均理论作为天体力学和系统科学中研究时变系统稳定性的常用工具,最近被应用到切换拓扑下的多智能体系统趋同控制理论中.文章对基于平均理论的高阶线性多智能体系统在切换拓扑下的趋同控制问题进行综述.系统地介绍了切换拓扑下的线性多智能体系统的趋同能控性和趋同能观性,讨论趋同能控性和趋同能观性之间的对偶原则.在趋同能控性和趋同能观性的基础上,对各种趋同控制算法进行了总结,阐述了状态耦合型和输出耦合型趋同算法.     

具有部分状态信息的二阶多智能体系统的一致性

研究二阶连续多智能体系统的一致性问题,其中每个智能体只能在一系列离散时刻上获得位置信息.为了关于完全状态,即位置和速度,都达到一致,设计一类协议,并建立在该协议下,一致性成立的充要条件.该条件揭示了交流拓扑、控制器增益、采样周期和保持器的更新周期之间的关系.仿真例子表明理论结果是有效的.     

异质分数阶非线性多智能体系统的预设时间一致性北大核心CSCD

该文研究了一类异质分数阶非线性多智能体系统的预设时间一致性问题.设计了一类基于时变函数的预设时间分数阶积分控制器,将分数阶非线性多智能体系统转化为一阶非线性多智能体系统.然后综合利用整数阶Lyapunov函数法和预设时间控制技术,分别实现了具有连通无向图和具有含生成树有向图的多智能体系统的精确预设时间一致性控制.该预设时间可以通过时变函数预先设定,且不依赖于系统初始值和参数.最后,用实例验证了理论结果的有效性.     

Iterative learning consensus control with initial state learning for fractional order distributed parameter models multi-agent systems

This paper considers the consensus control problem of multi-agent systems (MAS) with distributed parameter models. Based on the framework of network topologies, a second-order PI-type iterative learning control (ILC) protocol with initial state learning is proposed by using the nearest neighbor knowledge. A discrete system for proposed ILC is established, and the consensus control problem is then converted to a stability problem for such a discrete system. Furthermore, by using generalized Gronwall inequality, a sufficient condition for the convergence of the consensus errors between any two agents is obtained. Finally, the validity of the proposed method is verified by two numerical examples.     

Consensus of heterogeneous multi-agent systems with linear and nonlinear dynamics

In this paper, we perform an in-depth study about the consensus problem of heterogeneous multi-agent systems with linear and nonlinear dynamics.Specifically, this system is composed of two classes of agents respectively described by linear and nonlinear dynamics. By the aid of the adaptive method and Lyapunov stability theory, the mean consensus problem is realized in the framework of first-order case and second-order case under undirected and connected networks.Still, an meaningful example is provided to verify the effectiveness of the gained theoretical results. Our study is expected to establish a more realistic model and provide a better understanding of consensus problem in the multi-agent system.     

Variable impulsive consensus of nonlinear multi-agent systems

In this paper, the consensus problem for nonlinear multi-agent systems with variable impulsive control method is studied. In order to decrease the communication wastage, a novel distributed impulsive protocol is designed to achieve consensus. Compared with the common impulsive consensus method with fixed impulsive instants, the variable impulsive consensus method proposed in this paper is more flexible and reliable in practical application. Based on Lyapunov stability theory and some inequality techniques, several novel impulsive consensus conditions are obtained to realize the consensus of multi-agent systems. Finally, some necessary simulations are performed to validate the effectiveness of theoretical results.     

不确定二阶多智能体系统的鲁棒最优一致

针对不确定二阶多智能体系统,研究了其鲁棒最优一致性问题.首先,基于每个智能体所获得的邻居信息,设计了一个使多智能体系统达到一致的控制协议.其次,研究了多智能体系统的最优一致性问题,给出了系统在满足一定性能指标下达到一致的条件.再次,基于该条件,利用Schur补引理和线性矩阵不等式技术,给出了不确定系统达到鲁棒最优一致的条件.最后,通过仿真验证了所得结果的可行性.     

Design and analysis of quantizer for multi-agent systems with a limited rate of communication data

This paper concerns the problem of consensus for multi-agent systems with a limited rate of communication data. The effect of the quantization error on consensus is analyzed for the case that the nodes’ dynamics is described by the first order integrator with a quantized message input. In order to describe how exactly the consensus is achieved, the notion of consensus level is introduced. Based on these, a suboptimal method of resource allocation to reduce such effect of quantization error is proposed, and a dynamic quantizer is designed to meet the requirement of the consensus level, under the constraints that the total quantization rate of overall system is limited. At last, a numerical example is included for demonstration, and the outcome of the simulations suggests the validity of the presented theoretic results.     

具有领导者的非线性分数阶多智能体系统的一致性分析

研究了利用非线性分数阶模型描述的具有领导者的多智能体系统的一致性问题.基于智能体之间的通讯拓扑图,设计了系统的控制协议和相应的控制增益矩阵.利用广义Gronwall不等式和分数阶微分方程的稳定性理论,得到了多智能体系统达到一致的充分条件.最后,数值仿真结果显示了理论结果的有效性.     

Consensus seeking in multi-agent systems via hybrid protocols with impulse delays

This paper studies the consensus problem of multi-agent systems with both fixed and switching topologies. A hybrid consensus protocol is proposed to take into consideration of continuous-time communications among agents and delayed instant information exchanges on a sequence of discrete times. Based on the proposed algorithms, the multi-agent systems with the hybrid consensus protocols are described in the form of impulsive systems or impulsive switching systems. By employing results from matrix theory and algebraic graph theory, some sufficient conditions for the consensus of multi-agent systems with fixed and switching topologies are established, respectively. Our results show that, for small impulse delays, the hybrid consensus protocols can solve the consensus problem if the union of continuous-time and impulsive-time interaction digraphs contains a spanning tree frequently enough. Simulations are provided to demonstrate the effectiveness of the proposed consensus protocols.     

基于牵制控制的多智能体系统的有限时间与固定时间一致性

主要研究了在有限时间与固定时间内,牵制多智能体系统到异质目标节点的问题.通过设计非连续的控制协议和两种有效的牵制方案,使得一群有向协作个体在有限时间内或者固定时间内与目标节点达到一致.利用微分包含、集值映射及Lyapunov稳定性理论,给出了多智能系统达到有限时间一致性和固定时间一致性的充分条件.最后,通过数值仿真验证了所得条件的有效性.