Font Size: a A A

A Study On Distributed Real-time Multi-agent Techonology And It's Application In NCW

Posted on:2005-12-08Degree:DoctorType:Dissertation
Country:ChinaCandidate:W E ZhengFull Text:PDF
GTID:1116360125470661Subject:Navigation, guidance and control
Abstract/Summary:PDF Full Text Request
The main campaign form of future sea war is net-centric warfare, that is navy warship, fighter plane and coastal military foreces join in a high-centralized computer and communication network, in which every unit shares large amount key information, this promotes greatly the response speed, accurateness and validity of navy battle. Net-centric warfare system is a distributed real-time system that has characteristics of independence, heterogeneousness, adaptability and synergetic, it is a great challenge to traditional distributed real-time computation. Agent (intelligent unit) has characteristics of independence, adaptation, sociality, intelligence, mobility and reactivity, so it is considered that distributed real-time multi-agent is the key technology of net-centric warfare system.This dissertation is a study of theories and technologies to build a distributed real-time multi-agent system in the background of navy force net-centric warfare system. At present, agent study is focused on logic of agent and its formalization, but current agent technology seldom cares about real-time, the ready system pays little attention to balance between real-time and intelligence and can not meet the demands of distributed multi-agent system, this dissertation surrounds the hard-time and soft-time requirement of multi-agent system, the main work and achivement as the followings:The structure and control model of a real-time agent is put forward through integration of agent logics theory and real-time intelligent techonology. A real-time mixed multi-layered agent structure based on agent's BDI logics and mixed structure is given. Better work is done in meeting the requirement of multi-agent real-time system by introducing control plan using Anytime Arithmetic in agent control, also TAEMS is adopted to express the real-time task structure, and the quality of real-time agent plan is defined, and three kinds of policy of choosing plan is given, which is Highest Quality Policy, Minimum Execution Time Policy and Most Probably Quality Policy; agent task schedulerusing tradeoff arithmetic which is based on a tradeoff between task's quality and its time is designed; implement frame of an single agent is given, the methods are optimized by using plan cache and online learning, this further meets the real-time control requirement of a agent.Communication theory of distributed real-time agent is lucubrated in this dissertation. It first brings about the software structure of agent communication based on KQML, and the means by which agent to achieve real time communication, namly to add time constraint at the meta-layer of communication language; gives definition of QoS (Quality of Service, QoS) in communication, and puts forward the real time extention methods of KQML based on QoS, then solves the problem of real-time communication in Multi-agent communication. Further, presents principle of safe agent communication, extends safety parameters in KQML, defines tow new sentences of KQML for safety communication.The cooperation and coordination method of Agents under real-time constriant are studied, a multi-agent coordination model is presented. A new agent mental status model BGC (Belief, Goal and Command, BGC) is put forward, this is a betterment of Rao and Georgef's agent BDI (Belief, Desire and Intention, BDI) theory; brings about an new organization structure based on command using BGC model, builds an model of command net; gives a new coorperation and coordination technique satifying real-time multi-agent system, and development way of agent organization. Further builds a social dynamics of non-conflict multi-agent society using multi-person cooperative game theories and technologies, describes the original impetus of shaping agent organization.Uncertain reasoning methods in multi-agent system are studied in this paper. It introduces a new uncertainty in multi-agent system, namely unascertainty, and brings unascertained mathematics in the processing of uncertainty, further applies unascertained numbers to settle the problem o...
Keywords/Search Tags:agent, distribute real-time system, agent coordination, uncertain reasoning, net-centric warfare
PDF Full Text Request
Related items