• 한국정밀공학회지
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• 제19권10호
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• pp.7-14
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• 2002

• 한국공작기계학회논문집
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• 제17권6호
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• pp.111-117
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• 2008

An automation process of filter unit is presented for the application of the assembling procedure and dry furnace work. By that automation procedure, it is expected to enhance working environment such as reducing laboring load, harmful gas, and burning scald. Furthermore, this automation process also minimizes via standardization of manufacturing process so that it may increase productivity and reliability. An automation process of filter unit is presented for the application of the assembling procedure and dry furnace work. Filter automation process also gives a good quality and productivity by simplifying to only one line from the complicated process such as filter cutting$\rightarrow$ adhering$\rightarrow$fabricating in a very small space. It is found that a new conceptual design of dry furnace shows the better quality like uniform heat distribution compared to the conventional design. It is also found that the present design gives a better working environment by adding cooling system.

• International Journal of Fluid Machinery and Systems
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• 제2권4호
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• pp.418-425
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• 2009

A vertical bulb turbine unit with elbow type draft tube has been developed due to avoidance of complicated assembling and long standstill period at overhaul in comparison with conventional horizontal bulb turbine unit. Before designing the prototype vertical bulb unit, a hydrographic model test was carried out to establish the ideal design concept for this innovative generating unit. Froude similarity is not available for vortex occurrence. Consequently, an intake structure without air entraining vortices under all the flow conditions is developed, and it is confirmed that the surge wave at load rejection is not affected harmful influence for other constructions.

• 산업경영시스템학회지
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• 제19권38호
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• pp.105-115
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• 1996

According to the manual of shoemaking, the urethane adhesive for dress shoe applicable to the cementing process in KS G 3116 has been steadily developed. The evaluation test result of urethane adhesive, which is a mathematical model of men's shoe on shoemaking, is presented. Also, the quality test result of urethane adhesive, which is a list of experiment for field application and a model of assembling component in each unit process is introduced.

• 제어로봇시스템학회논문지
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• 제4권1호
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• pp.88-99
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• 1998

In assembly, misalignment must be detected and compensated for during the mating period, regardless of the complexity of the cross-sectional shape. To this end, we propose a novel omnidirectional image sensing system for assembling parts with complicated shapes(OISSA) and its feasibility for detecting the misalignment between mating parts is shown by a series of simulations. This system encompasses a camera with an optical unit attached to the front of the camera. The optical unit consists of a pair of plane mirrors and a pair of conic mirrors. Utilizing the proposed sensing system, a 2$\pi$ coaxial image of the misalignment along the mating boundary interface between mating parts can be immediately obtained without experiencing self-occlusion.

• 한국건설관리학회논문집
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• 제13권6호
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• pp.133-142
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• 2012

최근 저탄소 녹색성장 등 건설 환경의 변화에 따라 친환경적이고 시공 효율성을 극대화할 수 있는 유닛모듈러 공법 등과 같은 새로운 건축시스템에 대한 요구가 증대되고 있다. 유닛모듈러 공법은 전체 공정의 80%이상을 공장에서 제작하고 현장에서는 유닛모듈 조립과 마감작업 위주로 작업이 진행되므로 설계 및 공장 제작 등 현장시공 이전 단계의 품질이 건축물 전체의 품질을 좌우하는 특성을 가진다. 국내 유닛모듈러 공법은 2003년 학교 건축물의 적용을 시작으로 점차 확대되고 있지만, 적용 사례와 관련 자료의 부족, 모듈러 생산업체의 영세성 등으로 유닛모듈러 공법의 특성을 충분히 반영한 설계, 공장제작 및 현장시공은 아직 이루어지지 못하고 있는 실정이다. 본 연구는 국내 유닛모듈러 건축물의 설계품질 향상의 일환으로 공장제작 및 현장시공 단계에서의 문제점을 도출하고, 그 원인을 비교 분석함으로써 유닛모듈러 건축물의 설계 초기 단계에서 고려해야 할 주요 검토 항목을 제시하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.283-284
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• 2012

High-rise building construction has been increasing for the recent years and the construction process has become more complicated. This suggests a need for precise planning based on reliable data to prevent cost overruns and delays. However, the process planning is implemented based mainly on the experience of engineers that can result in critical damage in cost and time. Accurate productivity estimation and unit cost analysis must be considered important matter to prevent such disaster. This study estimates productivity and unit cost of curtain wall operations in high-rise building construction by simulation techniques and statistical methodologies. This study suggests a decision making methodology for the site personnel that enables to compare various combinations of productivity and unit cost based on reliable data that has been collected in actual construction sites. It is expected that this study contributes to the following research of developing an optimized construction performance assembling model for the site personnel.

• 한국소음진동공학회논문집
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• 제22권10호
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• pp.959-967
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• 2012

The theory for a new electromagnetically biased diskless combined radial and axial magnetic bearing is developed. A typical magnetic bearing system is composed of two radial magnetic bearings and an axial magnetic bearing. The axial magnetic bearing with a large axial disk usually limits rotor dynamic performance and makes assembling and disassembling difficult for maintenance work. This paper proposes a novel electromagnet biased integrated radial-axial magnetic bearing without axial disk. This integrated magnetic bearing uses two axial coils to provide the bias flux to the radial and axial air gaps of the combined bearing. The axial magnetic bearing unit in this combined magnetic bearing utilizes reluctance forces developed in the non-uniform air gaps such that the axial disk can be removed from the bearing unit. The 4-pole homopolar type radial magnetic bearing unit is also designed and analyzed. Three dimensional finite element model for the bearing is also developed and analyzed to illustrate the diskless combined magnetic bearing.

• 한국강구조학회 논문집
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• 제26권6호
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• pp.537-547
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• 2014

골조 유닛 모듈러 구조 형식은 기 제작된 유닛 구조물을 적층하여 건물을 보다 간편히 건설을 할 수 있어 중, 고층 건물에 적용이 확대되고 있다. 이러한 유닛 모듈러 구조 형식은 외력에 의하여 발생하는 축력과 휨모멘트를 지반에 잘 전달시켜야 함으로 각각의 유닛구조물은 기초와 적절히 연결되어야 한다. 본 연구에서는 새로운 형태의 매입형 유닛-기초 접합부를 제안하였으며, 제안된 접합부의 성능을 일련의 실험 연구를 통하여 평가하였다. 총 5개의 실물 크기의 실험체를 제작하여 실험을 수행하였으며, 매입 길이와 엔드 플레이트와 같은 제안된 유닛-기초 접합부의 휨거동에 영향을 미칠 수 있는 인자들의 영향을 살펴보았다. 실험결과, 모든 실험체에서 강성은 최소한 반강접의 강성을 상회하는 것으로 나타났으며, 기둥의 매입길이는 본 연구에서 수행한 실험체에서 약 200mm가 적절한 것으로 파악되었다.

• 항공우주기술
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• 제4권1호
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• pp.86-94
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• 2005

본 연구는 원격측정명령처리기 성능검증모델의 개발을 위해 수행된 설계, 해석, 제작 및 시험에 관한 것이다. CTU EQM의 각 보드별 주요 요구 규격에 따른 로직 설계를 수행하였으며 최악조건해석, 소자스트레스 해석, 신뢰도 해석, FMECA 해석 및 우주환경 및 발사환경 해석을 통해 설계의 타당성을 분석하였으며, 보드 제작 및 조립 후 수행된 기능 시험, 환경시험 및 ETB 시험을 통해 CTU EQM의 모든 성능을 확인하였다.