• 한국시뮬레이션학회논문지
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• 제18권4호
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• pp.175-184
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• 2009

해양센서네트워크에서 센서 노드간의 거리는 네트워크의 성능을 좌우하는 매우 중요한 요소 중 하나이다. 본 논문은 해양환경에 적합한 통신 경로를 설계하기 위하여 효율적인 거리를 설정하고 레벨(Level)을 나누는 기법을 제안한다. 제안한 기법으로 설정된 경로를 유지하고 에너지 효율을 극대화 하여 전체 네트워크의 수명을 연장하는 방안을 연구하는 것에 목적을 두었다. 설정된 경로는 내 외부적인 요소들에 의해 유동적으로 변경될 수 있으며 제안된 경로 강화 기법을 통해 더욱 견고한 해양센서 네트워크를 구축한다.

• 한국CDE학회논문집
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• 제1권3호
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• pp.177-188
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• 1996

An approach to providing computational support with an expert shell is discussed with the scope of an industrial wire harness design, especially at a manufacturing stage. Key issues include the development of an architecture that supports a frequent design change among engineers associated with different parts of the wiring design process and the development of hierarchical representations that capture the different characteristics (e.g., connectivity, configuration) of the harnesses. The abstraction of design information results in features, while the abstraction of drawing elements leads to the definition of objects. These abstractions are essential for efficient transactions among people and computer tools in a domain that involves numerous interacting constraints. In this paper the strategy for the problem decomposition, the definition of features, and the ways in which features are shared by various operations and design changes, are discussed. We conclude with a discussion of some of the issues raised by the project and the steps underway to address them.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1993년도 가을 학술발표회논문집
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• pp.81-90
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• 1993

The optimum design of a structure requires the determination of the economical member size and shape of the structure which satisfies the design condition and function. In this study, the process of design automatization of three-dimensional truss structure introduces the optimization technique tests its application in the design automatization, proposes its application method and applies the example structure of the parabolic antenna truss. Using the Formex Algebra of configuration function, the structure's mesh-generation is automatized. By using the program developed in this study, the input member array, member size and load condition designer can generate the input data file for the structure analysis and optimum design. This study is aimed at the development of a design automatization system that search for tile optimum value of a structure design by observing the structure's sensitivity from the modification of member array and member property.

• Advances in Computational Design
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• 제2권3호
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• pp.241-256
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• 2017

This paper introduces the process for Multi-objective Optimization Framework (MOF) which mediates multiple conflicting design targets. Even though the extensive researches have shown the benefits of optimization in engineering and design disciplines, most optimizations have been limited to the performance-related targets or the single-objective optimization which seek optimum solution within one design parameter. In design practice, however, designers should consider the multiple parameters whose resultant purposes are conflicting. The MOF is a BIM-integrated and simulation-based parametric workflow capable of optimizing the configuration of building components by using performance and non-performance driven measure to satisfy requirements including build programs, climate-based daylighting, occupant's experience, construction cost and etc. The MOF will generate, evaluate all different possible configurations within the predefined each parameter, present the most optimized set of solution, and then feed BIM environment to minimize data loss across software platform. This paper illustrates how Multi-objective optimization methodology can be utilized in design practice by integrating advanced simulation, optimization algorithm and BIM.

• 대한기계학회논문집A
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• 제29권7호
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• pp.1013-1021
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• 2005

In this paper, we developed an automatic design optimization system for parametric shape optimization of cooling passages inside axial turbine blades. A parallel three-dimensional thermoelasticity finite element analysis code from an open source system was used to perform automatic thermal and stress analysis of different blade configuration. The developed code was connected to an evolutionary optimizer and built in a design optimization system. Using the optimization system, 279 feasible and optimal solutions were searched. It is provided not only one best solution of the searched solutions, but also information of variation structure and correlation of the 279 solutions in function, variable, and real design spaces. To explore design information, it is proposed a new interpretation approach based on evolutionary clustering and principal component analysis. The interpretation approach might be applicable to the increasing demands in the general area of design optimization.

• 한국CDE학회논문집
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• 제14권2호
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• pp.96-104
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• 2009

It gradually becomes important to study on how to efficiently integrate and manage plant lifecycle data such as 2D schematic and 3D solid data, logical configuration data, and equipment specifications data. From this point of view, converting plant design data from various systems into neutral data independent from any commercial systems is one of important technologies for the operation and management of plants which usually have a very long period of life. In order to achieve this goal, a neutral model for efficient integration and management of plant data was defined. After schema mapping between one of specification-driven plant design systems and the neutral model was performed, a plant data translator is also implemented according to the mapping result. Finally, by experiments with nuclear power plant design, the feasibility of the translator was demonstrated.

• 한국항행학회논문지
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• 제24권3호
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• pp.224-231
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• 2020

광학계측분야는 레이더 계측이 어려운 저고도 구간의 계측을 담당하여 비행체 추적에 있어서 중요한 역할을 차지하고 있다. 기존의 광학추적시스템은 외국의 장비를 도입해 사용하고 있기 때문에 시험장 상황에 적합하게 수정하기 어렵고, 대부분 차량 탑재형으로 제작되어 있어 계측 장소에 제한이 있다. 자체 개발 소형 광학추적기는 이러한 단점을 보완하기 위해서 단순한 구성으로 설계하여 시험장 내 어떠한 장소에서도 설치하여 운용할 수 있는 것을 주목적으로 하였다. 뿐만 아니라 인공지능 기술을 적용한 광학추적기술 연구를 위해서 자체 개발 광학추적기를 보유할 필요성이 제기되고 있다. 본 논문에서는 소형 광학추적기의 설계 개념, 기본적인 추적기능 구현을 위한 장비의 구성, 그리고 비행체 특성에 맞는 환경설정을 위한 시뮬레이션을 진행하였다. 이를 위해 팬/틸트의 입출력 데이터를 사용하여 모델링을 구하였으며, 시뮬레이션을 통해 얻어진 결과와 실제 비행시험 결과를 비교하여 전반적인 시뮬레이션의 구성에 대한 타당성을 검증하였다.

• Earthquakes and Structures
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• 제14권1호
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• pp.1-10
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• 2018

Seismic retrofitting of existing buildings and design of earth-quake resistant buildings are important issues associated with earthquake-prone zones. Use of metallic-yielding dampers as an energy dissipation system is an acceptable method for controlling damages in structures and improving their seismic performance. In this study, the optimal distribution of dampers for reducing the seismic response of steel frames with multi-degrees freedom is presented utilizing the uniform distribution of deformations. This has been done in a way that, the final configuration of dampers in the frames lead to minimum weight while satisfying the performance criteria. It is shown that such a structure has an optimum seismic performance, in which the maximum structure capacity is used. Then the genetic algorithm which is an evolutionary optimization method is used for optimal arrangement of the steel dampers in the structure. In continuation for specifying the optimal accurate response, the local search algorithm based on the gradient concept has been selected. In this research the introduced optimization methods are used for optimal retrofitting in the moment-resisting frame with inelastic behavior and initial weakness in design. Ultimately the optimal configuration of dampers over the height of building specified and by comparing the results of the uniform deformation method with those of the genetic algorithm, the validity of the uniform deformation method in terms of accuracy, Time Speed Optimization and the simplicity of the theory have been proven.

• 한국조경학회지
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• 제37권6호
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• pp.66-72
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• 2010

서울시가 추진해온 대규모 공원 조성 사업의 일환으로 강북지역의 생활권 공원조성을 위하여 드림랜드 부지를 거대한 녹지의 숲과 공원이 어우러진 공간으로 계획하였다. 공간 구성기법으로 채움보다는 비움의 미학을 통하여 불확실한 도시의 변화에 대응하기 위한 잠재성을 부여하였고, 경관구성을 위하여 전통적인 서울의 산악경관 요소를 도입하고 차경하여 조망축을 형성하였는데, 유려하게 펼쳐진 한폭의 산수화 같은 한 그루의 나무, 하늘과 바람, 그리고 물과 흙의 심상이 표현되고 있다. 이것은 도시화의 계획에 배제되어 왔던 자연을 중요한 고려의 대상으로 삼음으로서, 서구도시의 건축적 랜드마크와는 차별화된 우리의 산과 구릉지 모습으로 도시경관의 지배적 랜드마크를 만드는 것이다. 그러므로 본 연구는 전통의 경관개념과 한국적 공간의 유형에서 추출한 시설배치 기법과 요소를 설계에 적용하여 기존의 도시가로와 마당과 같은 공원의 공간이 전통적 위계를 가지도록 하였으며, 도시의 확장된 오픈 필드(open field)를 통하여 공간경험의 다양성과 잠재성을 추구하여 북서울꿈의숲을 설계하였다.

• 한국실내디자인학회논문집
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• 제18권5호
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• pp.183-190
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• 2009

Increase in the elderly population has given rise to various social problems throughout Korean society, and what is more, although the greater demand of medical treatment, its development is still in its early stages. Given that Specialized Geriatrics Hospital has stood amid a range of spatial complication and it should faithfully reflect the needs of elderly population, we need a better understanding of Specialized Geriatrics Hospital. This study suggested the foundation to plan of Specialized Geriatrics Hospital through analyzing and evaluating spatial configuration of Specialized Geriatrics Hospital by "Space Syntax" and "J-Graph" The study focused on Specialized Geriatric Hospitals existing in Korea which owned more than 100 beds. The result of this study is summarized as follows; First, the rate of separated convex showed that the portions of the Treatment of outpatients and Supply have increased, but onthe other hand the portion of the The ward has been on the decrease. Second, in the case of Treatment of outpatients, it was structured Tree-shaped and the Tree-shaped could be separated with two types: waiting room and wailing room with lounge. in the case of The ward, it was structured Tree-shaped and also Ring-shaped. The more recently opened Geriatrics Hospital, the closer to Ring-shaped. Third, the access to the Ccentral treatment was low though the access to the core of the each floor was high. Fourth, in the progress of intelligibility, the fact that its value has decreased is becoming a serious problem of medical development for the elderly population finally, according to J-graph's analysis, the hallway made the spatial depth of rooms and public space more deepened. This caused by scattered arrangement of public spaces. As the only planning were considered in this study, It therefore needs more diversified approaches considering physical factors such like real distance and area.