• Title/Summary/Keyword: Multi agent system

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Evoluationary Design of a Fuzzy Logic Controller For Multi-Agent Robotic Systems

  • Jeong, ll-Kwon1;Lee, Ju-Jang
    • Transactions on Control, Automation and Systems Engineering
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    • v.1 no.2
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    • pp.147-152
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    • 1999
  • It is an interesting area in the field of artifical intelligence to find an analytic model of cooperative structure for multiagent system accomplishing a given task. Usually it is difficult to design controllers for multi-agent systems without a comprehensive knowledge about the system. One of the way to overcome this limitation is to implement an evolutionary approach to design the controllers. This paper introduces the use of a genetic algorithm to discover a fuzzy logic controller with rules that govern emergent agents solving a pursuit problem in a continuous world. Simulation results indicate that, given the complexity of the problem, an evolutionary approach to find the fuzzy logic controller seems to be promising.

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A comparative Study for dispersion model in evacuation plan by using MAS-based evacuation simulation (MAS 기반 피난시뮬레이션을 이용한 분산대피 비교 연구)

  • Jang, Jae-Soon;Rie, Dong-Ho
    • Journal of the Korean Society of Safety
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    • v.29 no.1
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    • pp.59-63
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    • 2014
  • Smoke is one of the most critical factor when escaping from the fire since it reduces visibility and interrupts finding emergency exit lights. Therefore, it is recommended that an evacuation simulation program should incorporate the smoke factor. In addition, it is suggested that the program should include not only the unilateral damage by the smoke but also the detour evacuation by risk communication. In this study, MAS (Multi Agent System)-based simulation program which incorporates the reduced walking speed by smoke and adopts the dispersion evacuation logic during escaping from the fire. To make comparison, a commercial evacuation program, Pathfinder was used. It was found that the simulation results of MAS (Multi Agent System)-based program is better than Pathfinder in terms of safe evacuation. It means that evacuation simulation need a additional evaluation categories that include not only quick evacuation time but also safe evacuee number.

Multi-dynamic Decision Support System for Multi Decision Problems for Highly Ill.structured Problem in Ubiquitous Computing (유비쿼터스 환경에서 다중 동적 의사결정지원시스템(UMD-DSS) : 비구조적 문제 중심으로)

  • Lee, Hyun-Jung;Lee, Kun-Chang
    • Journal of Intelligence and Information Systems
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    • v.14 no.2
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    • pp.83-102
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    • 2008
  • Ubiquitous computing requires timely supply of contextual information in order to upgrade decision quality. In this sense, this study is aimed at proposing a multi-dynamic decision support system for highly ill-structured problems. Especially, it is very important for decision makers in the ubiquitous computing to coordinate conflicts among local goals and global goal harmoniously. The proposed Multi-Dynamic Decision Support System (MDDSS) is basically composed of both central structure and distributed structure, in which central structure supports multi objects decision making and distributed structure supports individual decision making. Its hybrid architecture consists of decision processor, multi-agent controller and intelligent knowledge management processor. Decision processor provides decision support using contexts which come from individual agents. Multi-agent controller coordinates tension among multi agents to resolve conflicts among them. Meanwhile, intelligent knowledge management processor manages knowledge to support decision making such as rules, knowledge, cases and so on. To prove the validity of the proposed MDDSS, we applied it to an u-fulfillment problem system in which many kinds of decision makers exist trying to satisfy their own objectives, and timely adjustment of action strategy is required. Therefore, the u-fulfillment problem is a highly ill-structured problem. We proved its effectiveness with the aid of multi-agent simulation comprising 60 customers and 10 vehicles under three experimental modes.

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Multi-agent System based on Blackboard System for Soccer Robot Implementation

  • Sanornoi, Nitiwat;Phurahong, Boonchana;Sooraksa, Pitikhate
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.2023-2028
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    • 2004
  • This paper reveals the utilization of the multi-gent system that based on the Blackboard system basis as the controller of Soccer Robot. This system is a portion of developing the Soccer Robot team for Robocup 2004 Competition. In this development, the intelligent control system was initiated by the combination of parallel and distributed blackboard structures with the principle design that generated from human body structures, which consists of the combination of two main systems, the organs system and the brain system. The system is designed using the control system theory based on Blackboard basis. Modification of the initial structures to corroborate the Soccer Robot and the structure's constituents are clarified accordingly. To demonstrate the idea, ITE-old team is given as a case study.

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HMA(Hierarchical Multi Agent) for Operation of Distribution Power System (HMA(Hierarchical Multi Agent)방법을 이용한 배전계통 운영 시스템)

  • Kim, D.H.;Kwak, J.W.;Lee, S.S.;Lee, S.K.;Yoon, Y.T.
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.503-504
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    • 2007
  • 배전 계통은 기본적으로 방사상 구조를 가지고 있지만 향후 분산 전원의 출현 등으로 계통 운영의 복잡성이 증대될 것이다. 따라서 계통의 재구성이나 복구와 관련된 운영 전반에 관한 판단의 정확성과 신속성을 요구하게 된다. 본 논문에서는 HMA(Hierarchical Multi Agent) 방법을 이용하여 배전 계통의 운영에 활용해 보았다. HMA 방법은 서로 다른 행동 특성을 가진 Agent들이 자신의 역할을 수행하면서 전체적인 최적해를 찾을 수 있고 적은 정보를 이용하기 때문에 사고에 대처하는 속도가 빨라질 것으로 예상된다. 본 논문에서는 배전 계통에 맞는 HMA 모델과 각 Agent들의 행동 원칙을 제안하고 활용 방안을 제시하였다.

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Interaction Between Agents (Arguing and Cooperating Agents)

  • Seng, Ng-Kee;Abdullah, Abdul-Hanan;Ahmad, Abdul-Manan
    • Proceedings of the IEEK Conference
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    • 2002.07b
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    • pp.1173-1176
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    • 2002
  • Interaction builds up among agents in order to accomplish their goals. Argumentation is important for agent negotiation and interaction. In this paper, we discuss about the framework for multi-agent argumentation and the way multi-agents co-operates between each other. We identify aspects of classical argumentation theory that are suitable and useful for artificial agents.

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Implementation of Personalized Digital Library Service based on Negotiatory Mobile Multi-Agent System (협상 모바일 멀티에이전트 기반-개인 디지털 도서관 서비스 시스템 구축)

  • 이성재;조영임;김유신
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2003.05a
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    • pp.202-205
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    • 2003
  • 본 논문은 모바일 멀티 에이전트프레임워크를 이용한 분산환경에서의 개인 디지털 도서관 서비스(PLS) 시스템을 제안하였다. 기존의 에이전트 프레임워크와 차별적으로 모바일 시스템과 분산 처리 시스템을 조합한 시스템을 사용하였으며 멀티 에이전트간 협상 알고리즘과 스케줄링 방법을 개발함으로써 프레임워크가 효율적으로 동작하도록 하였다.

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Multi-Criteria Decision Making Based Logistics Brokerage Agents (다기준 의사결정 기반의 물류중개 에이전트)

  • Jeong, Keun-Chae
    • IE interfaces
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    • v.16 no.4
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    • pp.473-484
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    • 2003
  • In this paper we deal with the logistics brokerage process in which a logistics agent intermediates between vehicle owners and shippers for matching empty vehicles and freights. Based on the Multi-Criteria Decision Making (MCDM) methodology, the proposed agent system matches the most preferred empty vehicle to the shipper and the most preferred freight to the vehicle owner. In the proposed agent system, an MCDM based sensitivity analysis is also used for supporting decision makers under negotiations. Among various MCDM methodologies, Analytic Hierarchy Process (AHP) is utilized in this paper. Although AHP is one of the most popular MCDM methodologies, AHP needs a number of pair-wise comparisons for assessing alternatives and hence may give excessive decision making burden to the decision makers. In this paper, in order to reduce the decision making burden, a preference function based estimation method is proposed. We can expect that the MCDM based logistics brokerage agent can be used as an efficient and effective tool for e-logistics marketplaces on the internet.

A Study on Intelligent Recommendation Agent for a Mobile Envionment (모바일 환경을 위한 지능형 추천 에이전트에 관한 연구)

  • Joo Bok-Gyu;Kim Man-Sun
    • The Journal of the Korea Contents Association
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    • v.6 no.4
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    • pp.55-62
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    • 2006
  • Important issues emerging with the opening of the ubiquitous age are how to present ubiquitous environment and how services and access methods can be provided to users. The present research proposes a system that can provide users with useful information dynamically through intelligent multi agents in mobile environment. The system is composed of profile module, rule generation module, filtering module and service module. It was designed to find users' demands in an intelligent way based on information on users registered through the recommendation agent. We implemented an applied system and proved its performance through an experiment.

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