• 제목/요약/키워드: Intelligent manufacturing system

검색결과 361건 처리시간 0.034초

프랙탈 생산시스템에서의 강화학습을 통한 골 보정 방법 (Goal Regulation Mechanism through Reinforcement Learning in a Fractal Manufacturing System (FrMS))

  • 신문수;정무영
    • 한국경영과학회:학술대회논문집
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    • 대한산업공학회/한국경영과학회 2006년도 춘계공동학술대회 논문집
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    • pp.1235-1239
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    • 2006
  • Fractal manufacturing system (FrMS) distinguishes itself from other manufacturing systems by the fact that there is a fractal repeated at every scale. A fractal is a volatile organization which consists of goal-oriented agents referred to as AIR-units (autonomous and intelligent resource units). AIR-units unrestrictedly reconfigure fractals in accordance with their own goals. Their goals can be dynamically changed along with the environmental status. Since goals of AIR-units are represented as fuzzy models, an AIR-unit itself is a fuzzy logic controller. This paper presents a goal regulation mechanism in the FrMS. In particular, a reinforcement learning method is adopted as a regulating mechanism of the fuzzy goal model, which uses only weak reinforcement signal. Goal regulation is achieved by building a feedforward neural network to estimate compatibility level of current goals, which can then adaptively improve compatibility by using the gradient descent method. Goal-oriented features of AIR-units are also presented.

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Sliding cover의 고속 운동 특성 평가 (Motion Characteristic Evaluation of Sliding Cover for High Speed Type Machine)

  • 강재훈;송준엽;박화영;이승우;황주호;이현용;이찬홍;이후상
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2002년도 추계학술대회 논문집
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    • pp.446-449
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    • 2002
  • Recently, advanced manufacturing system with high speed and intelligent have been developed for the betterment of machining ability. In this case, reliability prediction work with motion characteristic evaluation of sliding cover has also important roll from design procedure to manufacturing and assembly process. Accordingly in this study, H/W test -bed system for reliability evaluation of sliding cover has been developed to obtain proper reference data for design of new model, and also prevention trouble, quality and life cycle improvement extremely for advanced mother machinary.

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Datamining: Roadmap to Extract Inference Rules and Design Data Models from Process Data of Industrial Applications

  • Bae Hyeon;Kim Youn-Tae;Kim Sung-Shin;Vachtsevanos George J.
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제5권3호
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    • pp.200-205
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    • 2005
  • The objectives of this study were to introduce the easiest and most proper applications of datamining in industrial processes. Applying datamining in manufacturing is very different from applying it in marketing. Misapplication of datamining in manufacturing system results in significant problems. Therefore, it is very important to determine the best procedure and technique in advance. In previous studies, related literature has been introduced, but there has not been much description of datamining applications. Research has not often referred to descriptions of particular examples dealing with application problems in manufacturing. In this study, a datamining roadmap was proposed to support datamining applications for industrial processes. The roadmap was classified into three stages, and each stage was categorized into reasonable classes according to the datamining purposed. Each category includes representative techniques for datamining that have been broadly applied over decades. Those techniques differ according to developers and application purposes; however, in this paper, exemplary methods are described. Based on the datamining roadmap, nonexperts can determine procedures and techniques for datamining in their applications.

반도체 자동화 생산을 위한 실시간 일정계획 시스템 재 구축에 관한 연구 : 300mm 반도체 제조라인 적용 사례 (Real-Time Scheduling System Re-Construction for Automated Manufacturing in a Korean 300mm Wafer Fab)

  • 최성우;이정승
    • 지능정보연구
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    • 제15권4호
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    • pp.213-224
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    • 2009
  • 본 연구는 국내 300mm 웨이퍼를 이용하여 반도체 제품의 제조라인을 대상으로 수행 되었던 자동화 생산을 위한 일정계획 시스템 재 구축 프로젝트에 관한 내용이다. 본 프로젝트의 주요 목적은 반도체 제조라인 내의 세정, 확산, 포토, 증착과 같은 주요공정들을 대상으로 효율적인 일정계획 수립 알고리듬을 개발하고 그것을 실시간 일정계획 시스템에 구현함으로써 반도체 제조라인의 자동화 생산률을 향상시키는 것이다. 본 논문에서는 여러가지 주요 공정들 중 제한된 대기시간 제약과 배치공정의 특성이 존재하는 세정과 확산으로 이루어진 연속공정 구간을 대상으로 개발된 일정계획 알고리듬과 실시간 일정계획 시스템의 개발에 대한 내용에 초점을 두었다. 일정계획 시스템 재 구축 프로젝트가 시작 될 시점에 세정과 확산 공정의 자동화 생산률은 각각 50%와 10% 정도 였으나, 프로젝트 수행 완료 후에는 각각 91%와 83% 까지 자동화 생산률이 향상 되었다. 자동화 생산률의 향상은 작업자의 인건비 절감, 생산성의 향상, 지속적이고 편차 없는 생산을 의미한다.

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사용자 맞춤형 미디어 스트리밍 서비스를 위한 모바일 플랫폼 설계 및 구현 (Design and Implementation of Mobile Platform for Personalized Media Streaming Service)

  • 박성주;양창모
    • 한국방송∙미디어공학회:학술대회논문집
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    • 한국방송공학회 2010년도 하계학술대회
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    • pp.360-363
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    • 2010
  • Streaming Technology can support the real-time playback without downloading and storing multimedia data in local HDD. So, client browser or plug-in can represent multimedia data before the end of file transmission using streaming technology. Recently, the demand for efficient real-time playback and transmission of large amounts of multimedia data is growing rapidly. But most users' connections over network are not fast and stable enough to download large chunks of multimedia data. In this paper, we propose an intelligent IP streaming system based on personalized media service. The proposed IP streaming system enables users to get an intelligent recommendation of multimedia contents based on the user preference information stored on the streaming server or the home media server. The supposed intelligent IP streaming system consists of Server Metadata Agent, Pumping Server, Contents Storage Server, Client Metadata Agent and Streaming Player. And in order to implement the personalized media service, the user information, user preference information and client device information are managed under database concept. Moreover, users are assured of seamless access of streamed content event if they switch to another client device by implementing streaming system based on user identification and device information. We evaluate our approach with manufacturing home server system and simulation results.

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Multi-Agent based Negotiation Support Systems for Order based Manufacturers

  • Choi Hyung Rim;Kim Hyun Soo;Park Young Jae;Park Byung Joo;Park Yong Sung
    • 한국정보시스템학회:학술대회논문집
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    • 한국정보시스템학회 2003년도 춘계학술대회
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    • pp.1-20
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    • 2003
  • In this research, we developed a Multi-Agent based Negotiation Support System to be able to increase the competitive power of a company in dynamic environment and correspond to various orders of customers by diffusion of electronic commerce. The system uses the agent technology that is being embossed as new paradigm in dynamic environment and flexible system framework. The multi-agent technology is used to solve these problem through cooperation of agent. The system consists of six sub agents: mediator, manufacturability analysis agent, process planning agent, scheduling agent, selection agent, negotiation-strategy building agent. In this paper, the proposed Multi-Agent based Negotiation Support System takes aim at the automation of transaction process from ordering to manufacturing plan through the automation of negotiation that is the most important in order-taking transaction.

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물자취급장비 선정과 평가를 위한 지능화된 자문시스템 (An intelligent consultant for mataerial handling equipment selection and evaluation)

  • 박양병
    • 경영과학
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    • 제12권1호
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    • pp.35-50
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    • 1995
  • The material handling equipment selection, that is a key task in the material handling system design, is a complex, difficult task, and requires a massive technical knowledge and systematic analysis. It is also invaluable to justify the selected equipment model by the performance evaluation before its actual implementation. This paper presents an intelligent knowledge-based expert system called "IMESE" created by author, for the selection and evaluation of material handling equipment model suitable for movement and storage of materials in a manufacturing facility. The IMESE was constructed by using the tools of VP-Expert expert system shell, DBASEIII plus, FORTRAN 77, and SLAMII simulation language. The whole process of IMESE is executed under VP-Expert expert system environment.vironment.

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Performance assessment of an ultraprecision machine tool positioning system with a friction drive

  • Song Chang-Kyu;Shin Young-Jae;Lee Hu-sang
    • International Journal of Precision Engineering and Manufacturing
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    • 제6권3호
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    • pp.8-12
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    • 2005
  • The positioning system for an ultra precision machine tool must be accurate to the order of a nanometer. Various feed drive devices have been proposed to achieve this resolution; currently, most attention is directed towards hydrostatic lead screws and friction drives. It has been reported that a positioning resolution accurate to an angstrom can be achieved using a twist-roller friction drive. Therefore, we manufactured an ultra precision positioning system driven by a twist-roller friction drive and assessed its performance when defining problems and finding solutions. Our study showed that the twist-roller friction drive is mechanically suitable for ultra precision positioning, but some considerations are required to obtain a higher resolution.