• 디지털산업정보학회논문지
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• 제4권3호
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• pp.97-101
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• 2008

In this paper, an assembly education training system is presented using AR (augmented reality). The effectiveness of the training using the proposed system is verified on a PC assembly training experiment. The experimental results confirmed the training using the proposed system is more effective than that using the conventional systems based on texts and images by reducing the assembly (task) time.

• 전자공학회논문지B
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• 제30B권12호
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• pp.40-50
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• 1993

This paper presents a new method for generating assembly sequences. The method acquires constraints on sequencing the assembly tasks without redundancy. Then it generates the assembly sequences without seatching undesirable tasks by recursively searching all assembly tasks which do not violate the assembly constraints. Since the method does not search undesirable tasks, it can generate assembly sequences for complex products. Current available methods may not generate assembly sequences for the complex product since their search-space increases explosively as the number of parts rises.

• 품질경영학회지
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• 제23권3호
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• pp.140-155
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• 1995

This paper proposes a quality control method of assembly parts based on parts inspection information. We use the parts inspection information for reduction of defective fraction in assembly and prediction of assembly quality. At first, we build the functional relationship between parts and assembled unit by regression analysis. Secondly, if we use the inspection informations of parts which are estimators of means and variances, we can predict the nonconforming probability of assembled unit and propose the best assembly method. In a case study, we showed the efficency of the proposed method in two part assembly.

• Industrial Engineering and Management Systems
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• 제11권2호
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• pp.188-195
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• 2012

This paper presents a new mode of expressing a 3D assembly work for creating a 3D CG animation without judgment by human from minimal required information. In the field of manufacturing, there are favorable movements in the utilization of 3D CAD for 3D simulation to shorten lead time for product development and pre-production. But simulating an assembly work has troubles to need huge quantity of manually input data. This paper discusses what minimal necessary information for creating 3D CG animations of assembly works is, focusing on the features of assembly works. Furthermore, a new mode of expressing a 3D assembly work is proposed as "state/change transition diagrams" (SCTD), which express arbitrary scenes in an assembly work as "state" and describe a sequential assembly work with "state" and "change", and the outline of its stepwise generation algorithm is also described. SCTD can be converted to a 3D CG animation of an assembly work without judgment by human. This paper focuses on the creating 3D CG animation of assembly works which workers use only their both hands.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 추계학술대회 논문집
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• pp.359-364
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• 2002

In engineering design environment it is hard to link design data and system because the types of them are disparate. Therefore, the importance of metadata has increased. Some researches have been executed to develop metadata. But they cannot interact with other metadata and are difficult to extend. The purpose of this paper is to develop a common metadata structure which represents the general information of mechanical part assembly using XML, and to use it as base documents in order to integrate design data and systems. It is composed of part and assembly documents. Part document represents the information of a part independently to part type. Assembly document represents the location of part documents which compose an assembly. Common documents can be used as a broker between design data and systems and improve interpretability and reusability of document. We applied the developed common document structure to 2-stage spur gear drive.

• 한국문헌정보학회지
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• 제47권4호
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• pp.25-48
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• 2013

본 연구는 국회기록정보 온라인 서비스의 발전 방안을 제시하는 데 목적을 둔다. 이를 위해 기록정보서비스 관련 선행연구를 분석하고, 국회기록정보서비스의 현황을 파악한다. 이를 통해, '포괄적 기록정보서비스의 부재', '대국민 서비스 창구의 부재', '콘텐츠의 부재' 등 국회기록정보서비스의 문제점을 파악한다. 사례 연구로서 미국과 영국 입법기록관리기관의 온라인 서비스를 분석하고, 그 유형을 검색지원 서비스, 부가 콘텐츠 서비스, 확장 서비스로 구분하여 각각의 구체적 사례를 살펴본다. 해외사례 분석에서 도출한 시사점을 바탕으로, 결론에 갈음하여, 국회기록 포털의 구성, 포괄적 검색지원 서비스의 제공, 맞춤형 부가 콘텐츠의 개발, 웹 아카이브 서비스 제공, 조직적 확장 서비스의 제공 등 5가지 영역에서의 국회기록정보서비스 발전 방안을 제시한다.

• 한국정밀공학회지
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• 제16권5호통권98호
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• pp.29-39
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• 1999

Many industrial products can be assembled in various sequences of assembly operations. To save time and cost in assembly process and to increase the quality of products, it is very important to choose an optimal assembly sequence. In this paper, we propose a methodology that generates an optimal assembly sequence by using the knowledge of experts. First, a product is divided into several sub-assemblies. Next, the disassembly sequences of sub-assembly are generated using disassembly rules and special information can be extracted through the disassembly process. By combining every assembly sequence of sub-assemblies, we can generate all the possible assembly sequences of a product. Finally, the expert system evaluates all the possible assembly sequences and finds an optimal assembly sequence. It can be achieved under consideration of the parameters such as assembly operation, tool change, safety of part. basepart location, setup change, distance, and orientation. The developed system is applied to UBR(Unit Bath Room) example.

• 정보관리학회지
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• 제38권3호
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• pp.41-71
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• 2021

국회기록은 민주주의의 역사적 증거로써 큰 가치를 가지고 있어 공공기록 중 가장 활용가치가 높은 기록 중 하나로 볼 수 있다. 때문에 업무상의 참고자료 혹은 증빙자료로 활용될 뿐만 아니라 학술 목적으로도 이용되고 있다. 학술 정보 이용자는 우리 사회의 지적 능력을 향상시키고 간접적 혁신을 이끌 수 있으며 이들에게 맞춤형 서비스를 제공 한다면 기록관리기관의 지속적인 열람과 이용률을 증가시킬 수 있다. 따라서 본 연구는 국회기록을 담당하고 있는 국회기록보존소의 학술 정보 서비스 활성화 방안을 제안하는 것을 목적으로 하였다. 이를 위하여 문헌연구와 미국과 영국의 입법 아카이브센터 사례조사, 국회기록보존소 서비스 담당 실무자 2명과 국회기록을 학술 목적으로 이용해 본 이용자 8명을 대상으로 인터뷰를 수행하였다. 분석 결과를 바탕으로 온라인 원문 구축 확대와 국회기록보존소 홍보를 통한 국회기록보존소 인식 개선과 국회사무처와 협력체계 구축, 주제별 국회기록 제공, 국회기록 수집 및 분석 지원을 통한 온라인 서비스 강화, 개인화 서비스와 연구가이드를 통한 맞춤형 이용자 서비스를 제안하였다.

• 한국공작기계학회논문집
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• 제16권5호
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• pp.101-107
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• 2007

Assembly is mentioned as important process saving time and cost where we produce the machine with many parts relationships. In this study, parts assembly relationship is analysed for assembly information of micro milling machine which have been developing for research. Liaison diagram, datum flow chain and assembly tree are applied to discuss assembly characteristics of micro milling machine model. We can find out the characteristics of micro machine assembly and discuss about facility of assembly. Some analysis in this paper about micro milling machine will give a useful tools for assembly. We knew that the predicted results from analysis in this study are alignment and clearance among the parts. The 3D model of micro machine which is studied in this paper is not a complete model. Main parts of a micro milling machine are used and presented.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
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• pp.272-279
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• 2002

A common task in assembly modeling is the determination of the position and orientation of a set of components by solving the spatial relationships between them. Assembly models could be constructed at various levels of abstraction. They could be classified into component or geometry-level assembly models. The geometry-level assembly design approach using mating constraints such as against and fits is widely used in the commercial modelers, but it may be very tedious in some cases fur designer. In this paper, we propose a new method to construct an assembly model at the component-level by extracting joint mating features from the kinematics constraints specified between components. The assembly model constructed using the proposed method includes hierarchical and relational assembly models, component/sub-assembly positions and degrees of freedom information. The proposed method is more intuitive and natural way of assembly design and it guarantees the topological robustness of assembly modification such as component replacement and modification.