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Consensus of Discrete-Time Linear Multi-Agent systems Under Switching Network Topology

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Consensus of Discrete-Time Linear Multi-Agent Systems Under ...

第三十届中国控制会议

作者： SU Youfeng and HUANG Jie department of Mechanical and Automation engineering,the chinese university of hong kong,shatin,N.T.,hong kong.

In this paper,we study the consensus problem of discrete-time linear multi-agent systems under switching network *** the assumption that the system matrix is neutrally stable,we will show that the consensus can be achieved via the state feedback protocol provided that the dynamic graph is jointly *** result will contain several existing results as special cases.

关键词： Consensus Switching network Multi-agent systems Discrete-time systems Jointly connected

THE LINEAR ARBORICITY OF COMPOSITION GRAPHS

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Journal of systems Science & Complexity 2002年第4期15卷 372-375页

作者： WU Jianliang LIU Guizhen Yuliang department of Economics Shandong university

The linear arboricity la(G) of a graph G is the minimum number of linear forests which partition the edges of G. Akiyama, Exoo and Harary conjectured that la(G) = [△(G)+1/2] for any regular graph G. In this paper, we... 详细信息

关键词： Graph composition of graphs linear arboricity complete multipartite graph.

ON COMPLEXITY OF POWER systems

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Journal of systems Science & Complexity 2003年第3期16卷 391-403页

作者： MAJin CHENGDaizhan hongYiguang departmentofElectricalengineering TsinghuaUniversityBeijing100084China InstituteofsystemsScience AcademyofMathematicsandSystemsSciencesChineseAcademyofSciencesBeijing100080China

The power system is a classical example of complex systems. In this paper it is shown that the power industry in china is facing a tremendous challenge. The complexity in power systems is investigated as follows. First, the cascade failure in power systems is analyzed, and compared with sand-pile model. Next, we show that the agent-based modelling is a proper way for power network. Mathematically, the geometric dynamics and differential inclusion are useful tools for the stability analysis of large scale power systems. As for power market, the game theory and generalized control system model are proposed. For a complex power system, an evolutive model may be more accurate in description and analysis. Finally, certain newly developed numerical methods in the power system computation are introduced. Overall, we are convinced that the theorem of complexity, combined with modern control theory, may be the right way to answer the challenges faced by the power industry in china.

关键词： power system cascade failure diagnosis agent-based modelling complexadaptive system stabilization

A Remark on Stabilization of Chua’s Circuit

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A Remark on Stabilization of Chua’s Circuit

第25届中国控制会议

作者： Liu Lu, Huang Jie department of Automation and Computer Aided engineering,the chinese university of hong kong, shatin,N. T.,hong kong

＜正＞Chua’s circuit has been a test-bed for studying various control problems such as chaos cancellation,synchronization, or stabilization. The circuit has been viewed as a lower triangular system and controlled as such by various state feedback control methods. In this note,we first point out that Chua’s circuit can be viewed as a nonlinear system in output feedback form. Therefore,it can be controlled by output feedback control law using some well established control techniques for output feedback systems. As an illustration, we have designed a simple adaptive robust output feedback control law to globally stabilize the circuit with arbitrary variations of the parameters of the circuit.

关键词： nonlinear systems Chua’s circuit stabilization

A POLYMER-BASED MICRO THERMAL ACTUATOR FOR MICROMANIPULATIONS IN AQUEOUS ENVIRONMENT

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A POLYMER-BASED MICRO THERMAL ACTUATOR FOR MICROMANIPULATION...

2002年微纳米国际会议

作者： Ho-Yin Chan and Wen J. LiCenter for Micro and Nano systems department of Automation and Computer-Aided engineering the chinese university of hong kong shatin N.T. hong kong

＜正＞ The development of a novel polymer-based thermal actuator is presented in this paper. It is a trimorph structure with a platinum metal heater encapsulated by Poly-para-xylylene C （parylene C） polymer layers. These polymer layers are used to protect the metal heater and trap heat while the actuator is operating in aqueous environment. We have proved that this thermal actuator can operate in aqueous environment with only 5V maximum input voltage for full deflection （90°change of tip direction）. The resistance of the heater is around 2kΩ. The dimension of the actuator is 2mm×l58μm×0.45μm. Modeling of the trimorph structure together with a method for optimizing its design and the fabrication process for the trimorph structure are discussed. Based on the successful operation of this polymer-based thermal actuator, we are currently developing multi-fingered thermal actuators for cellar grasping and manipulation.

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Unleashing the Power of Bio-based Thermotropic Liquid Crystal Modifiers:Toughening and Reinforcing Petroleum-based Epoxy Resin without Compromising Other Properties

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chinese Journal of Polymer Science 2024年第8期42卷 1093-1102页

作者： Qing-Yun Lu hong-Wei Gu Jia-Hui Li Qian-Qian Fan Bei-Tao Liu Yan Kou Xi-Gao Jian Zhi-Huan Weng State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsLiaoning Technology Innovation Center of High Performance Resin MaterialsDepartment of Polymer Science&EngineeringDalian University of TechnologyDalian 116024China Thermochemistry Laboratory Liaoning Province Key Laboratory of Thermochemistry for Energy and MaterialsDalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Toughening the petroleum-based epoxy resin blends with bio-based modifiers without compromising their modulus,mechanical strength,and other properties is still a big challenge in view of the *** this study,a bio-based liquid crystal epoxy resin(THMT-E P)with an s-triazine ring structure was utilized to modify a petroleum-based bisphenol A epoxy resin(E51)with 4,4'-diaminodiphenylsulfone(DDS)as a curing agent,and the blended systems were evaluated for their thermal stability,mechanical properties,and flame *** results showed that the impact strength of the blended system initially increased and then decreased with the increase in THMT-EP content,and it reached the a maximum value of 26.5 kJ/m^(2)when the THMT-EP content was 5%,which was 31.2%higher than that of E51/***,the flexural strength,modulus,and glass transition tem perature of the blended system were all simultaneously improved with the addition of *** the same time,the addition of THMT-EP enhanced the flame retardancy of the system by increasing the char yield at 700℃and decreasing the peak heat release rate and total heat release *** work paves the way for a more sustainable improvement in the comprehensive performance of epoxy resin.

关键词： Epoxy resin Toughening Bio-based Thermotropic liquid crystal

Input-to-state Stabilization of Feedforward systems with Dynamic Uncertainties

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Input-to-state Stabilization of Feedforward Systems with Dyn...

第二十六届中国控制会议

作者： Chen Tianshi,Huang Jie department of Mechanical and Automation engineering,the chinese university of hong kong,hong kong,P.R.china

This paper studies the input-to-state stabilization problem for a class of feedforward systems subject to dynamic *** versions of small gain theorems with restrictions are employed to establish the global attractivene... 详细信息

关键词： Nonlinear control Dynamic uncertainty Robust stability

TWO-SCALE FINITE ELEMENT GREEN'S FUNCTION APPROXIMATIONS WITH APPLICATIONS TO ELECTROSTATIC POTENTIAL COMPUTATION

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Journal of systems Science & Complexity 2010年第1期23卷 177-193页

作者： Ying YANG Aihui ZHOU department of Computational Science and Mathematics Guilin University of Electronic Technology Guilin 541004 China. The State Key Laboratory of Scientific and engineering Computing Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China.

In this paper,a two-scale finite element approach is proposed and analyzed for approximationsof Green's function in *** approach is based on a two-scale finite elementspace defined,respectively,on the whole domain with size H and on some subdomain containing singularpoints with size h (h << H).It is shown that this two-scale discretization approach is very *** particular,the two-scale discretization approach is applied to solve Poisson-Boltzmann equationssuccessfully.

关键词： Error analysis finite element Green's function Poisson-Boltzmann equation two-scale.

Distributed Event-Triggered Tracking Control of Second-Order Leader-Follower Multi-Agent systems

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Distributed Event-Triggered Tracking Control of Second-Order...

第三十届中国控制会议

作者： HU Jiangping~1,CHEN Guanrong~2,LI Han-Xiong~3 1.School of Automation engineering,university of Electronic Science and Technology of china,Chengdu 611731,P.R.china 2.department of Electronic engineering,City university of hong kong,hong kong 3.department of Manufacturing engineering and engineering management,City university of hong kong,hong kong

＜正＞When multi-agent systems are equipped with embedded microprocessors of limited resources,it is important to design an appropriate real-time scheduling of control *** this paper,we examine the synthesis of event-triggered information transmission and distributed estimation for a tracking control problem of leader-follower multi-agent *** a second-order leader-follower multi-agent system,we use a decentralized event-triggered strategy in the dynamic tracking control design. Then,we analyze the input-to-state stability of the closed-loop multi-agent system with the proposed event-triggered tracking ***,we present a numerical simulation to validate the proposed design.

关键词： Leader-Follower Multi-Agent System Distributed Estimation Event-Triggered Control