检索结果-南通市图书馆

Cooperative output regulation for linear uncertain MIMO multi-agent systems by output feedback

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2018年第9期61卷 218-231页

作者： Ying ZHANG youfeng su College of Mathematics and Computer Science Fuzhou University

In this paper, we study the cooperative output regulation problem for a class of general linear uncertain multi-input multi-output(MIMO) multi-agent systems subject to a well-defined vector relative degree. By proposing some suitable internal model, the problem is first converted into the auxiliary cooperative stabilization problem of the augmented system in the so-called strict feedback normal form. This auxiliary problem is then solved by some developed robust control techniques, such as multiple high-gain feedback and mixed distributed observer, leading to an effective distributed output feedback regulator synthesis for the original cooperative output regulation problem.

关键词： cooperative control output regulation MIMO output feedback vector relative degrees

Event-triggered tracking control for a class of nonholonomic systems in chained form

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第7期66卷 147-161页

作者： Liang XU youfeng su He CAI Center for Discrete Mathematics and Theoretical Computer Science Fuzhou University College of Computer and Data Science Fuzhou University School of Automation Science and Engineering South China University of Technology

In this study, the event-triggered asymptotic tracking control problem is considered for a class of nonholonomic systems in chained form for the time-varying reference input. First, to eliminate the ripple phenomenon caused by the imprecise compensation of the time-varying reference input, a novel time-varying event-triggered piecewise continuous control law and a triggering mechanism with a time-varying triggering function are developed. Second, an explicit integral input-to-state stable Lyapunov function is constructed for the time-varying closed-loop system regarding the sampling error as the external input. The origin of the closed-loop system is shown to be uniformly globally asymptotically stable for any global exponential decaying threshold signals, which in turn rules out the Zeno behavior. Moreover, infinitely fast sampling can be avoided by appropriately tuning the exponential convergence rate of the threshold signal. A numerical simulation example is provided to illustrate the proposed control approach.

关键词： event-triggered nonholonomic systems strict Lyapunov function tracking integral input-to-state stable

Nonlinear output-feedback tracking in multiagent systems with an unknown leader and directed communication

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2021年第12期64卷 160-174页

作者： Xinghu WANG youfeng su Dabo XU Department of Automation University of Science and Technology of China College of Mathematics and Computer Science Fuzhou University School of Automation Nanjing University of Science and Technology

This paper addresses cooperative global robust output regulation for heterogeneous and uncertain multiagent nonlinear systems in the output-feedback normal form. Specifically, we develop a Lyapunov-based dynamic output-feedback law using a nonlinear internal model approach. We show that an effective control law can be constructed under general(static) directed communication topologies even when the leader is unknown. Hence, the present study offers a more general investigation of the problem in comparison with the developments in the recent literature.

关键词： multiagent systems internal model unknown leaders output regulation output-feedback

Consensus of hybrid linear multi-agent systems with periodic jumps

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第7期66卷 311-312页

作者： Ying ZHANG youfeng su Center for Discrete Mathematics Fuzhou University School of Mathematics and Statistics Fuzhou University College of Computer and Data Science Fuzhou University

Dear editor, Multi-agent systems have attracted extensive attention in control communities due to their wide range of applications,such as multiple spacecraft systems [1] and wireless sensors [2]. The consensus problem, which aims to drive the states of all agents to a common trajectory asymptotically, is one of the most fundamental cooperative control problems.

关键词： Multi agent systems

Control of Second-order Nonlinear Multi-agent Systems with Unknown Leaders

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Control of Second-order Nonlinear Multi-agent Systems with U...

第36届中国控制会议

作者： Xinghu Wang youfeng su Dabo Xu Department of Automation University of Science and Technology of China College of Mathematics and Computer Science Fuzhou University School of Automation Nanjing University of Science and Technology

ISBN: (纸本)9781538629185

This paper studies cooperative global output regulation of a class of heterogeneous second-order nonlinear multi-agent *** agents states stand for positions and velocities and their dynamics can be heterogeneous and nonlinear,containing unknown parametric *** particular,we show solvability of the problem in the situation of unknown exosystems or *** on a nonlinear internal model principle,we develop an integral input-to-state stability（iISS） based Lyapunov method for a constructive nonlinear feedback protocol design.

关键词： Multi-agent systems cooperative output regulation distributed control internal model

在线全文

cnki会议

学校读者我要写书评

暂无评论

误诊为玫瑰糠疹的界线类偏瘤型麻风一例

中国麻风皮肤病杂志 2024年第1期40卷 3-4页

作者：苏友凤尹丽娇龙恒余秀峰张春雨朱明杨云友文山壮族苗族自治州皮肤病防治所、文山州皮肤病专科医院云南文山663099

临床资料患者,男,24岁。苗族,农民,云南省文山州文山市人。患者既往体健,否认麻风家族史,但长期居住在疫区。因躯干、四肢皮肤出现红斑4个月余就诊。患者自诉4个月前无明显诱因先于右上臂皮肤出现一椭圆形红斑,无明显自觉症状,随后躯干... 详细信息

临床资料患者,男,24岁。苗族,农民,云南省文山州文山市人。患者既往体健,否认麻风家族史,但长期居住在疫区。因躯干、四肢皮肤出现红斑4个月余就诊。患者自诉4个月前无明显诱因先于右上臂皮肤出现一椭圆形红斑,无明显自觉症状,随后躯干、四肢、面部皮肤相继出现大小不等的类似皮疹,伴微痒。病后曾到当地医院就诊,诊断为“玫瑰糠疹”,予以药物(具体不详)治疗后,皮损颜色变淡。为进一步诊治,到我所就诊。患者自发病以来无头痛、发热、咳痰、鼻塞、流清涕、胸闷、呼吸困难、恶心、呕吐、腹痛、腹泻等症状,精神、饮食、睡眠可,二便正常,体重无明显变化。

关键词：玫瑰糠疹四肢皮肤皮损颜色呼吸困难面部皮肤右上臂咳痰文山市

维普期刊数据库

Event Based Design for Cooperative Output Regulation of A Class of Multi-agent Nonlinear Systems

在线全文

学校读者我要写书评

暂无评论

Event Based Design for Cooperative Output Regulation of A Cl...

第36届中国控制会议

作者： Jiaqi Wang Dabo Xu Zhiyong Chen youfeng su Andong Sheng School of Automation Nanjing University of Science and Technology Electrical Engineering and Computing The University of NewcastleCallaghan College of Mathematics and Computer Science Fuzhou University

ISBN: (纸本)9781538629185

This paper considers a cooperative output regulation design for a class of multi-agent nonlinear *** this problem under undirected communication topologies,the previous studies have shown that some internal model principle based smooth distributed control law can be *** this study,we show an attempt of an event-based protocol by a cooperative practical output regulation approach.

关键词： Event-triggered control nonlinear systems stabilization

Leader-Following Consensus for Double-Integrator Multi-Agent Systems via Sampled Output Feedback

在线全文

cnki会议

学校读者我要写书评

暂无评论

Leader-Following Consensus for Double-Integrator Multi-Agent...

第三十九届中国控制会议

作者： Ying Zhang youfeng su College of Mathematics and Computer Science Fuzhou University

In this paper, the sampled-data leader-following consensus problem is considered for a group of double-integrator multi-agent systems. It is assumed in this problem that measurement output is only available at sampling instants, and the value of the control input only updates at those sampling instants. To solve this problem, a sampled-data output feedback control based on distributed continuous-discrete observer is proposed. This new algorithm has the performance that the sampling period can be freely chosen. We then show the asymptotic stability of the equivalent discrete-time system transformed from sampled-data closed-loop system. A simulation example is provided to illustrate the validity of the theoretical result.

关键词： Double-integrator Multi-agent systems Output feedback Distributed continuous-discrete observer

Ripple-free output consensus design for heterogeneous LTI multi-agent systems using sampled-data control

在线全文

cnki会议

学校读者我要写书评

暂无评论

Ripple-free output consensus design for heterogeneous LTI mu...

第三十九届中国控制会议

作者： Jingjing Cheng Dabo Xu youfeng su School of Automation Nanjing University of Science and Technology College of Mathematics and Computer Science Fuzhou University

This paper shows a sampled-data consensus design for heterogeneous linear time-invariant（LTI） multi-agent *** achieve the ripple-free design requirement and to provide estimates of the locally maximum allowable sampling periods（LMASPs） for the problem, we develop an internal model principle approach. The present study extends the continuous-time cooperative robust output regulation（CROR） investigations in literature and offers a ripple-free solution with estimates of the LMASPs by means of monodromy matrix-based stability analysis for hybrid systems. We also present a numerical example and perform simulations using Hybrid Equations（HyEQ） Toolbox in literature to illustrate the proposed results.

关键词： Multi-agent systems ripple-free response sampled-data systems hybrid systems