• Title/Summary/Keyword: Knowledge-based Design System

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Development of Integrated Design System for Structural Design of Machine Tools (공작기계 구조물 설계를 위한 통합설계 시스템 개발)

  • 박면웅;손영태;조성원
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.1
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    • pp.229-239
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    • 2003
  • The design process of machine tools is regarded as a sequential, discrete, and inefficient works as it requires various kinds of design tools and many working hours. This paper describes an integrated design system embedding a design methodology that can support efficiently and systematically the conceptual structural design of machine tools. The system is a knowledge-based design system and has four machine-tool-specific functional modules including configuration design, configuration analysis, structure design, and structural analysis support module. Through the configuration design and analysis module, a machine configuration appropriate for design requirements is selected, and then the arrangement of ribs fer each structural part is decided in the structure design module. Also, the structural analysis support module is used to evaluate design result by utilizing structural analysis software, ANSYS. The system is applied to design of a tapping machine, and shows that the machine structure can be designed fast and conveniently by processing each design step interactively.

Study of Object-Oriented Mechanical Design System (객체지향접근법을 이용한 기계 설계 시스템에 관한 연구)

  • 최경현;윤지섭;오승철
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.11a
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    • pp.769-773
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    • 1996
  • A design system for mechanical components is being developed using an Object-Oriented Programming language Smalltalk to allow mechanical designers to use the experience of expert designers. The system is organized in such a manner that the expert knowledge stored in it could be easily retrieved by the junior designer. The experience and the knowledge of the expert are placed in the databases. Multiple design models, in this system, can be processed simultaneously, because the expert knowledge is broken down into elements which can be used by different design models. In this way the system proves more flexible and extendable. In this paper, the philosophy of the system and the databases involved in the system will be addressed.

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A Study on the Development of Computer Aided Die Design System for Lead Frame, Semiconductor (반도체 리드 프레임의 금형설계 자동화 시스템 개발에 관한 연구)

  • Choe, Jae-Chan;Kim, Byeong-Min;Kim, Cheol;Kim, Jae-Hun;Kim, Chang-Bong
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.6
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    • pp.123-132
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    • 1999
  • This paper describes a research work of developing computer-aided design of lead frame, semiconductor, with blanking operation which is very precise for progressive working. Approach to the system is based on the knowledge-based rules. Knowledge for the system is formulated from pasticity theories, experimental results and the empirical knowledge of field experts. This system has been written in AutoLISP on the AutoCAD using a personal computer and in I-DEAS Drafting Programming Language on the I-DEAS Master Series Drafting with Workstation, HP9000/715(64). Transference of data between AutoCAD and I-DEAS Master Series Drafting is accomplished by DXF(drawing exchange format) and IGES(initial graphics exchange specification) methods. This system is composed of five modules, which are input and shape treatment, production feasibility check, strip-layout, data-conversion and die-layout modules. The process planning and Die design system is designed by considering several factors, such as complexities of blank geometry, punch profiles, and the availability of a press equipment and standard parts. This system provides its efficiecy for strip-layout, and die design for lead frame, semiconductor.

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PDM Based Design Knowledge Management System (PDM기반의 설계지식 관리 시스템)

  • 박성범;박홍석;여승훈;이규봉
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.1394-1397
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    • 2004
  • Company perform a lot process to produce products. If company try to satisfy for customer and improve technological competition, they must be changed to new system. As a result, we developed knowledge based smart search system and customized it to PDM system on commercial use. In this smart search system, wherever process designer can seek to result quickly. This will be upgraded for be applied to some company.

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RBFN기법을 활용한 적응적 사례기반 설계

  • Jeong, Sa-Beom;Im, Tae-Su
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2005.10a
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    • pp.237-240
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    • 2005
  • This paper describer a design expert system which determines the design values of shadow mask using Case-Based Reasoning. In Case-Based Reasoning, it is important to both retrieve similar cases and adapt the cases to meet the design specifications exactly. Especially, the difficulty in automating the adaptation process will prevent the designers from using the design expert systems efficiently and easily. This paper explains knowledge-based design support systems for shadow mask through neural network-based case adaptation. Specifically, we developed 1) representing design knowledge and 2) adaptive case-based reasoning method using RBFN (Radial Basis Function Network).

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A Design Support System for the Structural Design of Ships Based on an Expert System Development Shell (범용 전문가시스템 쉘을 이용한 선박의 구조설계 지원 시스템)

  • Han, Soon-Hung;Lee, Kyung-Ho;Lee, Dong-Kon;Kim, Eun-Ki;Lee, Kyu-Chul
    • Journal of Korean Institute of Industrial Engineers
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    • v.19 no.2
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    • pp.83-93
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    • 1993
  • Conventional computer programs developed and used by practicing engineers can be considered to contain expert knowledge and design experience. If these conventional programs are converted into expert systems, the difficult and time consuming process of knowledge acquisition can be simplified. Also the constructed knowledge-base can have higher confidence level than that constructed by the usual knowledge acquisition method of interviews. An existing computer program which is being used by ship structural designers has been reformulated as a design expert system by applying an expert system development shell-Nexpert. Utilizing the callable interface provided by the development shell, external design tools have also been integrated. The interfaced external functions are a graphical user interface (GUI) for the design process control, and graphics functions for the visualization of design results. It is observed that the developed system for design support is useful in two aspects. The trace-back function shows what portion of design rules are applied in arriving at certain design decisions. Also the knowledge-base can be conveniently updated as design rules of the classification societies are updated.

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A Study on the Process Planning and Die Design of Hot Forging for Axisymmetric Parts(I) (축대칭 부품에 대한 열간단조의 공정 및 금형설계에 관한 연구(I))

  • Choi, J.C.;Kim, B.M.;Kim, S.W.;Lee, J.S.;Hong, S.S.;Kim, N.H.
    • Transactions of Materials Processing
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    • v.1 no.1
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    • pp.20-32
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    • 1992
  • This paper describes some research of Computer-Aided Process Planning and Die Design of Hot Forging for axisymmetric parts produced by the press. An approach to the system is based on knowledge based system. The system has been written in AutoLisp with personal computer. Knowledges for process planning & die design are extracted from the plasticity theories, handbooks, relevent references and empirical know-how of field experts in hot forging companies. The developed system is composed of five main modules, such as input module, process planning module, die design module, flow simulation module and output module which are used independently or in all. The final output is generated in graphic from. The developed system which aids designer provides powerful capabilities for process planning and die design of hot forging. This system also provides approximate flow pattern.

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An Intelligent Cavity Layout Design System for Injection Moulds

  • Hu, Weigang;Masood, Syed
    • International Journal of CAD/CAM
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    • v.2 no.1
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    • pp.69-75
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    • 2002
  • This paper presents the development of an Intelligent Cavity Layout Design System (ICLDS) for multiple cavity injection moulds. The system is intended to assist mould designers in cavity layout design at concept design stage. The complexities and principles of cavity layout design as well as various dependencies in injection mould design are introduced. The knowledge in cavity layout design is summarized and classified. The functionality, the overall structure and general process of ICLDS are explained. The paper also discusses such issues as knowledge representation and case-based reasoning used in the development of the system. The functionality of the system is illustrated with an example of cavity layout design problem.

Development of an Automated Progressive Design System for Manufacturing Product with Multi Processes, Piercing, Bending, and Deep Drawing (복합공정(피어싱, 벤딩, 디프드로잉)을 갖는 제품 제조를 위한 프로그레시브 설계 자동화 시스템 개발)

  • Hwang, Beom-Cheol;Kim, Chul;Bae, Won-Byong
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.12
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    • pp.55-64
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    • 2008
  • This paper describes a research work of developing an automated progressive design system for manufacturing the product with multi processes such as piercing, bending, and deep drawing. An approach to the system for progressive working is based on the knowledge-based rules. Knowledge for the system is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. The system consists of three main modules, which are shape treatment, strip layout, and die layout modules. Based on knowledge-based rules, the system is designed considering several factors, such as material and thickness of a product, piercing, bending and deep drawing sequence, and the complexities of the blank geometry and punch profiles. It generates the strip layout drawing for an automobile product. Die design for each process is carried out through the die layout module from the results of the strip layout module. Results obtained using the modules enable the designers for manufacturing products with multi processes to be more efficient in this field.