• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.38 no.12
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• pp.1209-1216
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• 2010

This paper dealt with an alternative for maximizing mass savings in spacecraft design by replacing conventional aluminum alloy housing used for various spacecraft avionics by composite materials. Key requirements were defined for the purpose of composite housing design with sufficient durability and various functionalities as well as more lightweight characteristics as compared with aluminum alloy widely-used for conventional electronics housing. Conceptual design was also carried out for manufacturing modular, lightweight composite electronic housing equipped with high thermal and electrical conductivities, EMI protection, and radiation shielding characteristics as well as excellent structural performance; feasibility of enhancing mass savings in spacecraft design was presented.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.192.2-192.2
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• 2012

위성시스템 소형화, 탑재체 수용증대, 발사비용절감, 탐사임무 효율화 등의 요구로 인하여, 위성 설계에 있어 경량화는 오랜 기간 진행되어온 연구 주제였다. 이러한 연구결과로서, 위성 구조체를 복합재료로 대신하기 위한 구조 경량화 연구와 적용이 성과를 거두었으며, 현재 위성체 프레임이나 전개형 안테나, 광학구조물 등에 경량 탄소섬유 강화 복합재료의 적용은 보편화되어 있다. 한편, 위성시스템에서 전력, 통신, 명령/데이터처리, 자세제어 및 관측기기의 각종 전자장비를 보호하는 하우징 구조물에는 여전히 금속재료가 광범하게 적용되고 있다. 특히, 알루미늄 합금은 하우징 재료로 널리 사용되는데, 강도, 강성, 열전달, 우주방사, 전기전도도 및 EMI 차폐특성과 더불어 가공성이 우수하다는 장점을 지닌 반면에, 금속재료로서 중량이 상당하여 위성 경량화 관점에서는 한계를 갖게 하는 단점이 있다. 전자장비에 부여된 전자기능 측면에서 보면, 하우징은 기생 구조물로서, 경량으로 제공될수록 전자장비 전체 무게에서 전자유닛만의 무게가 차지하는 전기전자기능비가 향상되고 위성 경량화에 크게 기여할 수 있다. 구조 경량화를 위하여 전자장비 하우징을 경량 복합재로 대체하여 설계 및 제작하였으며, 복합재 하우징의 강도, 강성, 열전달, 우주방사, 전기전도도 및 EMI 차폐를 검증할 수 있는 방법에 대하여 검토하였다.

• 보일러설비
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• s.110
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• pp.99-107
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• 2003

지난 2월 21일부터 26일까지 6일간 서울 무역전시장(SETEC)과 코엑스(COEX)에서 경향신문사가 e하우징, SBS가 주최한 ‘2003 경향하우징페어’가 동시에 개최되었다. 올해로18회째를 맞는 이번 전시회에는 700여개 업체가 참가해 첨단 건축문화와 기술을 한눈에 보여주는 각종 건축자재와 최신 홈인테리어 트렌드를 선보였다. 건축자재, 공구, 조명기기, 펜션, 홈네트워킹시스템, 빌트인가구등 품목에 따라 각각 독립된 전시장이 꾸며져 관람객들에게 편의를 제공하였다. 또한 내 집을 꾸미는데 유익한 정보와 아이디어를 제공함으로써 일반인과 건축학도 및 건축설계 종사자, 시공자들에게 향후 시장변화에 적응할 수 있는 대안을 제시한 것으로 평가되었다. 이에 따라 본지는 이번 하우징 페어에 참가하여 우리 협회 회원들의 관심을 불러 일으킨 업체를 중심으로 소개한다.

• Aerospace Engineering and Technology
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• v.3 no.2
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• pp.124-132
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• 2004

This paper deals with the static and dynamic analysis of the housing and PCB of TCU(Thruster Control Unit) for KSLV-I(Korea Space Launch Vehicle-I). TCU should pass the environment test simulating the flight environment of KSLV-I. The most important tests are the vibration and the shock tests. In this research, we proposed a design standard about the vibration and the shock environment and then verified TCU housing and PCB design met the standard. Based on the analytical results, the TCU housing was redesigned to meet the design standard. The new design is supposed to pass the environment test.

• Journal of Korean Home Economics Education Association
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• v.23 no.2
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• pp.55-69
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• 2011

This study aims at developing and evaluating the cohousing teaching/learning plan for middle and high school. The plan was developed into 5 stages such as data collection and analysis, design, development, implement, and evaluation_ It was composed of 3 lessons with various teaching materials; the concept and necessity of cohousing, spatial composition, and making a cohousing village as the main theme. The 3 home economics teachers carried out the plan for 28 classrooms (1125 students) in 2 middle and I high school, during 23th, Aug., to 17th, Sep. 2010 in Kyunggido. The high level of understanding, learning processes, interest, satisfaction with the class reported by the students showed that the plan might be adequate to both high and middle school students. The teachers carried the lessons reported the similar positive responses to the plan with some suggestions to increase teaching hours, prepare class appliances, and prepractice the teaching materials.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.41 no.12
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• pp.975-986
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• 2013

This paper dealt with the fabrication and performance evaluation of the electronics housing made of lightweight composite materials, aiming at the enhancement of satellite mass savings by replacing conventional aluminum alloy widely used for satellite avionics with lightweight composite material. For this purpose, a fabrication process was designed to overcome low machinability of CFRP and to minimize the post-treatment. The composite housing with grid-stiffened and monolithic frame was made using co-curing method. Its performance was also evaluated regarding endurance, stiffness, thermal conductivity, electrical grounding, EMI protection and radiation shielding. The composite housing can provide the considerable mass savings over the aluminum housing with same dimension.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.25 no.3
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• pp.237-243
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• 2012

The thickness optimization of the gearbox housing for 5MW wind turbine is carried out with the help of the efficient structure analysis model and the approximation model of objective function. Wind turbine gearbox is a complex structural system composed of a number of gear trains, shafts, bearing and gearbox housing, requiring a tremendous number of elements for the structural analysis and design. In this paper, an effective analysis and design model considering the tooth stiffness of helical gears is proposed. It enables to significantly reduce the total element number and the analysis time. Through the numerical optimization of housing thickness making use of the effective gearbox model and the approximate model of objective function, the total weight of the gearbox housing is minimized. It has been observed from the numerical experiment that the approximation model is reliable and the optimization result is acceptable and verified analysis.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2002.11a
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• pp.339-344
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• 2002

The Purpose of this study Is to investigate Open Housing design methods on multi-family housing in the Netherlands and Finland. This study is based on the several actual field survey through visiting eight sites in the netherlands and Finland. we found a lot of design items applied to the Holland and Finnish multi-family housing for Open Housing. Open Housing design items are user participation design, layout flexibility, finishes selection, flexible utilities, interior components and use of modular grid.

• Journal of the Korean Society for Precision Engineering
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• v.12 no.12
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• pp.173-179
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• 1995

This paper descrived housing design in conception of dynamic characteristics. The vibration and noise in power train system of automobile are important on the environment matter. The vibration caused by meshing teeth of gear is transmitted to the gear box faces through shafts and bearings. Shape of housing is used different radius of curvature(R=0 to 80 mm). The velocity responese, sound power and radiation efficency on the surface of gear box are calculated. The sound power and radiation efficency are compared with different radius of curvature.

• Solar Energy
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• v.16 no.2
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• pp.97-112
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• 1996

The purpose of research is to complement the circulating pump of gas boiler for the domestic and to develop a pump housing with internal three way valve: Housing and three way valve have been apart in the existing pump system. Based on the experimental result on can-typed circulating pump with existing housing, a new housing with internal three way valve was designed and manufactured. The performance of can-typed circulating pump with the new housing, and the performance of circulating pump of boiler system were tested. As a result ot the test, the new housing with internal three way valve has been excellent in respect of pump performance, weight and manufacturing cost. So It is expected to have an effect of import substitution.