• 전기학회논문지P
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• 제59권3호
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• pp.279-287
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• 2010

Interior permanent magnet synchronous motor(IPMSM) adjustable speed drives offer significant advantages over induction motor drives in a wide variety of industrial applications such as high power density, high efficiency, improved dynamic performance and reliability. This paper proposes efficiency optimization control of IPMSM drive using adaptive fuzzy learning controller(AFLC). In order to optimize the efficiency the loss minimization algorithm is developed based on motor model and operating condition. The d-axis armature current is utilized to minimize the losses of the IPMSM in a closed loop vector control environment. The design of the current based on adaptive fuzzy control using model reference and the estimation of the speed based on neural network using ANN controller. The controllable electrical loss which consists of the copper loss and the iron loss can be minimized by the optimal control of the armature current. The minimization of loss is possible to realize efficiency optimization control for the proposed IPMSM. The optimal current can be decided according to the operating speed and the load conditions. This paper considers the design and implementation of novel technique of high performance speed control for IPMSM using AFLC. Also, this paper proposes speed control of IPMSM using AFLC1, current control of AFLC2 and AFLC3, and estimation of speed using ANN controller. The proposed control algorithm is applied to IPMSM drive system controlled AFLC, the operating characteristics controlled by efficiency optimization control are examined in detail.

• 한국태양에너지학회 논문집
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• 제31권6호
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• pp.78-85
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• 2011

In this study, an underfloor air distribution(UFAD) system installed on the S. office building was evaluated for its indoor environmental quality performance. Field measurement and survey were conducted for the overall POE(Post Occupied Evaluation). PMV(including temperature, humidity, air velocity and globe temperature) and several environmental components were measured while thermal comfort, thermal sensation, acoustical environment and others. were investigated through survey. Except for the direct upper part of the air supply diffuser on the floor, the indoor velocity was less than 0.25m/s, which has been suggested by ASHRAES tandard 55 as the limit for thermal comfort. MRT of the perimeter zone of the room showed a higher value than that in the interior because of the introduced solar radiation through the building envelope. PMV was generally maintained in the range of thermal comfort (from -0.5 to +0.5), though it weighted to the warm side. It was reported to have 61% positive response on thermal comfort and 55% on neutral thermal sensation. The results of each survey item showed some gender-based differences. Specifically, female respondents had higher degree of dissatisfaction with indoor air cleanness and acoustical privacy. The working surface showed more than 400 lux and the equivalent noise level showed less than 50 dB(A). In conclusion, the results of the measurement and survey showed good agreement. Indoor environmental quality of the subject office room where the UFAD system was installed showed an overall excellent performance.

• 한국화재소방학회논문지
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• 제34권3호
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• pp.58-66
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• 2020

주택의 경우에는 소방법에서 제외 대상으로 되어 있어 화재가 발생하더라도 초기 소화에 골든타임을 놓쳐 대부분 인명사고로 이어지고 있다. 이처럼 주택에서 화재와 사망자가 많이 발생하고 있어 소방법을 개정하여 정부에서는 2017년부터 단독 주택에도 소화기를 의무적으로 비치하도록 하였다. 소방청 2018년 주택용 기초 소방시설 설치 실태조사 자료에 의하면 전체 비치율이 34.8%에 불과하다. 소화기는 화재 시에는 꼭 필요한 기구이지만 가정집에서는 기피 대상으로 생각하고 있다. 투박하고 빨간 색상으로 되어 있어 집안 분위기와 어울리지 않기 때문이다. 이제 소화기도 평상시에는 장식품과 팬시용품처럼 집안에 비치해 두다가 화재가 발생하면 화재를 진압할 수 있도록 심플하면서도 디자인이 다양한 소화기가 있어야 한다. 집안 어디에 두어도 장식물처럼 어울릴 수 있는 제품이라면 소비자들의 구매력을 향상시킬 수 있는 동기부여가 될 수 있다. 이제는 다양한 디자인으로 심플한 소화기가 개발되도록 관련업체의 디자인 개발이 실질적으로 이루어져 상품화를 기대한다.

• 가정과삶의질연구
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• 제30권5호
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• pp.29-47
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• 2012

The purpose of this research is to identify the everyday life culture, housing satisfaction and housing importance of older Korean-Chinese living in Harbin, China. Social survey research using the questionnaire was conducted from August to October in 2011. A total of 94 usable samples were analyzed by the SPSS version the 18.0 statistical program using frequency, percentage, cross-tabulation, factor analysis, and Pearson's correlation. The major findings were as follows. Firstly, older Chinese in Harbin were assimilated into Chinese culture such as national holidays and respectful people, but acculturated in terms of their daily food, and their preference to live in a Korean-Chinese village. Secondly, they had mainly lived in multi-story houses, the so called Chinese-style apartments. The average size of their living space was $80.33m^2$ and they were usually unsatisfied with their neighbors and floor treatment lacking Ondol(溫突). Thirdly, 5 factors affecting on housing value orientation were 'physical characteristics','emotional characteristics', 'economic characteristics', 'social characteristics', 'neighbor characteristics/reputation of the house' and they explained 73.9%. 2 factors affecting on housing satisfaction were 'inner complex/inner space' and 'neighborhood environment' and they explained 69.4%. In conclusion, some policy is needed for Korean Chinese living in Harbin for their well-being when it comes to their housing needs and conditions. Given the nature of big city, Harbin and its attraction, younger Korean-Chinese tend to be rapidly assimilated into Chinese culture. However older people in Harbin think that it is important for their children to learn both countries' languages and cultures in order to be successful, so some concrete policies and supports are needed.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.441-445
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• 2007

정부의 대량주택공급정책 등으로 인한 고객중심으로의 시장변화는 자연히 주택 공급업체로 하여금 품질의 경쟁시대를 맞이하도록 하였다. 이러한 품질경쟁시대에서 빠르게 변화하는 고객의 요구품질에 부응하는 주택상품기획 방향을 모색하기위한 선행연구로서 현재 우리 주택시장에서 이루어지는 주택상품의 단위세대 품질의 차별화 사례유형에 대한 실태분석을 실시하였다. 조사 및 분석 결과 많은 사례들이 단순히 마감자재의 고급화나 일시 유행적인 친환경자재의 사용과 부분적이고 단속적인 생활편의품과 설비시스템의 건축요소와의 결합 등을 통한 상품풀질의 차별화를 꾀하고 있었다. 본 연구결과 주택상품의 차별화 기획은 고객을 중심으로 하여 단위세대의 품질 요소 중 건축지향적인 평면 및 인테리어요소와 기술지향적인 설비 및 제품요소의 유기적인 융합을 통합 품질의 차별화가 이루어져야 할 것으로 판단된다. 향후 주택상품기획단계에서는 고객 개념의 재정립을 통한 사람중심의 지속가능한 차별화 계획요소에 대한 연구 및 고객 지향적 주택상품기획 절차의 마련이 필요한 것으로 연구되었다.

• KIEAE Journal
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• 제16권4호
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• pp.41-46
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• 2016

Purpose: This is a study on the planning of temporary housing for post application of Mega Sports facilities. The subject of the study is 2018 Pyeongchang Winter Olympics, which is to suggest building an alternative temporary housing using shipping containers(high cube), which solve the lack of accommodations and recycle temporary housing after Olympics, save money and be eco-friendly in Olympics. Method: This study includes this ; research on the a fact-finding survey about Mega sports facilities post application and demand survey on 2018 Pyeongchang Winter Olympics accomodations and an analysis about temporary housing plan. Furthermore we decided temporary housing building plan by analyzing residents' needs and traits of the housing etc. Through this, we made a schematic design for household units. Result: As a result, this study is a plan of making space, forms, and structure. The planned size is $38.4m^2$(L:12m, W:3.2m) except balcony, and indoor height is 2.5m. The space consists of entrance, bathroom, bedroom and living room with folding furniture system. Also there's a detailed floor plan of the ceiling, wall, and floor we drew up. The ceiling and wall consist of dampproof film, noncombustible board, fire proof urethane form, and color-designed sheet. The floor is composed of floor tile, cement mortar, light concrete(with heat coil), insulation, and dampproof film. Additionally, this study is a plan of interior dry wall with detail using modular construction method for work efficiency and quality improvement.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제22권1호
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• pp.7-15
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• 2016

Purpose: There are the number of color tactile walking surface indicators installed in Korea, because of indefinite regulation in blind and vision-impaired persons' tactile walking surface indicators. In case of yellow tactile walking surface indicators, it shows a deviation severe color. In this study, the researchers suggested color and brightness reference for helping blind and vision-impaired persons' walking through analyzing the color references of tactile walking surface indicators and the color luminance between tactile walking surface indicators and sidewalk currently used. Method: Reasonable luminance contrast criteria is suggested by examining ways of improving the recognition and recognition of objects according to color contrast visually impaired through literature review and analyzing standards of tactile walking surface indicators and the Europe, Japan and Australia of color and luminance contrast criteria. And by examining the color of the tactile walking surface indicators reported in Korea currently used to derive the problem presented by the luminance contrast in the reference and comparison. Finally, the visually impaired tactile walking surface indicators is set for color selection criteria for the recognition rate improves. Results: In order to improve the recognition rate to be tactile walking surface indicators of the contrast of the visually impaired and the environment than the color of the tactile walking surface indicators itself to secure always a certain level or more of brightness contrast values in the set of the color of the tactile walking surface indicators so important. Implication: In order to set the blind tactile walking surface indicators color recognition based on the verification of the real pedestrian based on the results presented in this paper it is required. It is to be understood as an element of the barrier free configuration for securing the walking pedestrian safety.

• 교육시설
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• 제9권3호
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• pp.5-12
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• 2002

This study attempts to suggest a standard for maintenance and repair cost per each unit area, by analyzing the causes and cost of various maintenance and repair work in the university facilities. The result of my study on the data of maintenance and repair work for 12 years between 1990 and 2001 in the two campuses of the university that I selected for my case study is the following. (1) The yearly average for maintenance and repair cost in the facilities of the university with 67 old and new buildings for the past 12 years was $W4,422/m^2$. In addition, the repair cost based on the calculation of the degree of decrepitude of the buildings was $W10,291/m^2$. (2) The number of causes of maintenance and repair work increase steadily every year, due to the development of universities and changes in the educational environment. A special case like a university merger also appears, which also demands maintenance and repair work of university facilities. (3) It is important that a budget for interior maintenance is increased or added to an extent, in order to minimize the maintenance and repair cost of the university facilities, and to cope with changing educational environments flexibly. (4) The publication of a white paper that includes the planning of a building, construction process, and changes in design, seems to be required for the sake of users' convenience and efficient maintenance and repair work.

• 한국가구학회지
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• 제17권4호
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• pp.1-13
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• 2006

This study attempted to identify the characteristics of chair design from furniture company, $K{\ddot{a}}llemo$, the furniture manufacturer in Sweden manufacturing mostly the limited edition of art furniture on the basis of the unique management philosophy. There are 12 artists manufactured chairs for $K{\ddot{a}}llemo$. Of them, this study selected 4 artists-Sigurdur Gustafsson, John Kandell, Komplot Design, Mats Theselius-who designed at least more than three chairs. Total 25 chairs were analyzed; 6 from Sigurdur Gustafsson, 8 from John Kandell, 3 from Komplot Design and 8 from Mats Theselius. The chair structure was divided into three parts, seat, back and structure and analyzed by material, color, type of legs and finishing. The following results were derived from the study. First, $K{\ddot{a}}llemo$ secured the regular customers who want to possess the chairs as the artistic works by continuing the small quantity mass-production system insisting that the maximum quantity of production is 360 pieces and the minimum quantity is 33 pieces. Second, the sufficient time and cost were invested in the initial phase of design. This approach seems to be deviated from the traditional business system that has to create the revenue at a glance, but ultimately induces the commercial success by exponentially increasing the revenue through the creation of various product lines. Third, $K{\ddot{a}}llemo$ provides the space that the artists who work for $K{\ddot{a}}llemo$ can sufficiently enjoy the mental composure and luxury required for the designers by strictly selecting the artists and providing the best environment for enabling the creative activities that look like the pure art area. This study enables the further analysis and research on other collections of $K{\ddot{a}}llemo$ that mass-produces the chairs on the basis of the unique philosophy in the world as well as in Sweden using more various kinds of analysis frameworks.

• 한국항공우주학회지
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• 제35권4호
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• pp.353-362
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• 2007

대형위성과 달리 나노위성이나 마이크로위성과 같은 소형위성의 경우, 전장품을 장착하기 위한 위성 내부 공간은 극히 제한되어 있다. 이러한 문제를 완화하기 위해 나노위성 HAUSAT-2는 대부분의 서브시스템과 탑재체의 전장모듈들을 통합한 일체형 위성 버스전장박스(BEU; Bus Electronic Unit)를 개발하였다. 본 논문에서는 개발된 BEU의 설계, 환경시험 결과 및 성능 분석에 대해 기술하였다. 진동 및 열진공 시험은 새로 개발된 BEU의 설계 여유 검증을 위해 인증(qualification) 수준으로 수행하였다. 인증시험 전후의 성능시험을 통해 각 서브모듈들이 정상적으로 작동하는 것을 확인하였다. 진동시험 결과 BEU는 구조적인 손상 없이 설계 강성조건을 만족하는 것을 검증하였으며, 열해석 모델링의 보정을 통해 열진공시험과 거의 일치하는 결과를 얻게 되었다.