The messaging mechanism in distributed Virtual Environments (dVEs) deals with the issue of message delivery between participating entities and users. As dVEs are scaling up to an arbitrarily large size, any workable m...The messaging mechanism in distributed Virtual Environments (dVEs) deals with the issue of message delivery between participating entities and users. As dVEs are scaling up to an arbitrarily large size, any workable messaging mechanism must support real time interactions between a huge number of entities. This paper presents a new messaging scheme based on the autonomous messaging paradigm and demonstrates its strength in solving the challenging problems facing the messaging mechanism in large scale dVEs.展开更多
This paper considers the formation control problem of multi-agent systems in a distributed fashion. Two cases of the information propagating topologies among multiple agents, characterized by graphics model, are consi...This paper considers the formation control problem of multi-agent systems in a distributed fashion. Two cases of the information propagating topologies among multiple agents, characterized by graphics model, are considered. One is fixed topology. The other is switching topology which represents the limited and less reliable information exchange. The local formation control strategies established in this paper are based on a simple modification of the existing consensus control strategies. Moreover, some existing convergence conditions are shown to be a special case of our model even in the continuous-time consensus case. Therefore, the results of this paper extend the existing results about the consensus problem.展开更多
A novel distributed model predictive control scheme based on dynamic integrated system optimization and parameter estimation （DISOPE） was proposed for nonlinear cascade systems under network environment. Under the d...A novel distributed model predictive control scheme based on dynamic integrated system optimization and parameter estimation （DISOPE） was proposed for nonlinear cascade systems under network environment. Under the distributed control structure, online optimization of the cascade system was composed of several cascaded agents that can cooperate and exchange information via network communication. By iterating on modified distributed linear optimal control problems on the basis of estimating parameters at every iteration the correct optimal control action of the nonlinear model predictive control problem of the cascade system could be obtained, assuming that the algorithm was convergent. This approach avoids solving the complex nonlinear optimization problem and significantly reduces the computational burden. The simulation results of the fossil fuel power unit are illustrated to verify the effectiveness and practicability of the proposed algorithm.展开更多
研究并设计了空天飞行器自主式控制系统的体系结构。该体系结构采用多智能体技术设计,结构中的每个主体都具有一定的自主性,可以实现相应的功能,并能通过协作完成给定的飞行任务。通过对整个系统工作原理和各个主体具体功能的分析得出,...研究并设计了空天飞行器自主式控制系统的体系结构。该体系结构采用多智能体技术设计,结构中的每个主体都具有一定的自主性,可以实现相应的功能,并能通过协作完成给定的飞行任务。通过对整个系统工作原理和各个主体具体功能的分析得出,该分布式体系结构大大提高了系统的自主性及系统对复杂问题的解决能力,可以满足空天飞行器实现自主飞行的要求。同时通过与RA(R em ote agen t arch itecture)系统的比较还发现该系统具有更高的智能,更好的鲁棒性、移植性和扩展性。最后,本文在详细介绍了一种多智能体系统(M A S)设计软件和运行平台(分布式环境为中心的主体框架)的基础上研究了该自主控制系统的实现。展开更多
文摘The messaging mechanism in distributed Virtual Environments (dVEs) deals with the issue of message delivery between participating entities and users. As dVEs are scaling up to an arbitrarily large size, any workable messaging mechanism must support real time interactions between a huge number of entities. This paper presents a new messaging scheme based on the autonomous messaging paradigm and demonstrates its strength in solving the challenging problems facing the messaging mechanism in large scale dVEs.
基金the National Natural Science Foundation of China (No.60674071).
文摘This paper considers the formation control problem of multi-agent systems in a distributed fashion. Two cases of the information propagating topologies among multiple agents, characterized by graphics model, are considered. One is fixed topology. The other is switching topology which represents the limited and less reliable information exchange. The local formation control strategies established in this paper are based on a simple modification of the existing consensus control strategies. Moreover, some existing convergence conditions are shown to be a special case of our model even in the continuous-time consensus case. Therefore, the results of this paper extend the existing results about the consensus problem.
基金This work was supportedbytheNationalNaturalScienceFoundationofChina(No.60474051),theProgramforNewCenturyExcellentTalentsinUniversityofChina(NCET),andtheSpecializedResearchFundfortheDoctoralProgramofHigherEducationofChina(No.20020248028).
文摘A novel distributed model predictive control scheme based on dynamic integrated system optimization and parameter estimation （DISOPE） was proposed for nonlinear cascade systems under network environment. Under the distributed control structure, online optimization of the cascade system was composed of several cascaded agents that can cooperate and exchange information via network communication. By iterating on modified distributed linear optimal control problems on the basis of estimating parameters at every iteration the correct optimal control action of the nonlinear model predictive control problem of the cascade system could be obtained, assuming that the algorithm was convergent. This approach avoids solving the complex nonlinear optimization problem and significantly reduces the computational burden. The simulation results of the fossil fuel power unit are illustrated to verify the effectiveness and practicability of the proposed algorithm.
基金Supported by the National Natural Science Foundation of China under Grant No.60773177 (国家自然科学基金)the China Postdoctoral Science Foundation under Grant No.20060400316 (中国博士后科学基金)the National Social Science Foundation of China under Grant No.04BZX045 (国家社会科学基金)
文摘研究并设计了空天飞行器自主式控制系统的体系结构。该体系结构采用多智能体技术设计,结构中的每个主体都具有一定的自主性,可以实现相应的功能,并能通过协作完成给定的飞行任务。通过对整个系统工作原理和各个主体具体功能的分析得出,该分布式体系结构大大提高了系统的自主性及系统对复杂问题的解决能力,可以满足空天飞行器实现自主飞行的要求。同时通过与RA(R em ote agen t arch itecture)系统的比较还发现该系统具有更高的智能,更好的鲁棒性、移植性和扩展性。最后,本文在详细介绍了一种多智能体系统(M A S)设计软件和运行平台(分布式环境为中心的主体框架)的基础上研究了该自主控制系统的实现。
