• 한국CDE학회논문집
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• 제17권4호
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• pp.274-281
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• 2012

This paper proposed a control simulation method for design and verification of the transport system in an automobile assembly line based on digital manufacturing system. The design of the transport system involves two major activities: mechanical design (device specification) and electrical design (device behavior and system control). Conventionally, the simulation and emulation system of the transport system focuses on the abstract level, which mainly deals with design verification, alternative comparison, and system diagnosis. Although it can provide overall system visibility in monitoring how well it works in the process and view, its simulation models are not sufficiently realistic to be used for a detailed design or for implementation purposes. In this paper, a digital simulation model for a transport system in an automotive assembly line is constructed by adapting a digital manufacturing methodology. We use the concept of the "Virtual Probe", which transport a carrier instead of the belt of the conveyor. In conclusion, the proposed method is valuable in the process of test run in the shop floor. This method would reduce the time and effort for validating the manufacturing system and improve the productivity and integrity of the control program.

• 한국CDE학회논문집
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• 제11권4호
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• pp.265-272
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• 2006

For the design and analysis of 3D object featuring complexity and irregularity in shape, sectional digital images measured by an industrial CT scanner are employed to generate a finite element model with uniform voxels. The voxel model plays a key role in developing an integrated reverse engineering system including geometric modeling, simulation and optimization. Design examples applied to topology optimization show that the proposed approach can provide a remarkable reduction in time cost at the conceptual and detail design stages.

• 한국전자거래학회지
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• 제21권4호
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• pp.69-80
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• 2016

기술격차 감소로 인해 제품 차별화를 위한 인지 감성적 제품설계가 중요해지고 있다. 성별, 연령 등 다양한 사용자이 느끼는 감각(시각, 청각, 촉각 등), 인지(주의력, 기억력 등), 감성(심미성, 기능성 등)을 고려하기 위한 데이터베이스와 제품설계 가이드라인이 필요하다. 여러 실험으로부터 도출된 사용자 특성정보는 제품의 설계 및 평가 시 주요한 지표로 사용되고 있으며, 이를 저장할 통합적 인지 감성 데이터베이스를 구축하는 것이 필요하다. 본 연구에서는 인지 감성적 제품설계 지원을 위한 사용자 특성정보 메타데이터를 설계하고 프로토 타입 시스템으로 구축하였다. 감각, 인지, 감성에 관련된 기존 문헌들을 조사하고 분류하여 인지, 감성 유형별로 반영할 수 있도록 설계하였다. 제품설계/평가에 필요한 다양한 사용자 특성정보를 RDF 형식의 설계하였고, 설계된 메타데이터에 따라 인지, 감성에 관련된 사용자 특성정보를 저장할 수 있도록 프로토 타입 시스템을 구축하였다.

• Journal of Biosystems Engineering
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• 제33권2호
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• pp.94-100
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• 2008

Present chemical application method using a power sprayer has been labor intensive, costly and ineffective. Therefore, a small agricultural unmanned helicopter was suggested to replace the conventional spray system. In this study, conceptual design for developing the helicopter and a consequential prototype were reported. The overall conceptual design was initiated by deciding the type of agricultural helicopter, as the single rotor helicopter with a tail system. As the first step of the designing, an air-cooled, 2-stroke engine was selected and a prototype transmission was designed by determining the rotating speed of main rotor shaft. A 'pusher' type tail rotor system was adapted to balance the reaction torque and reduce the power use. The tail boom length was designed to avoid the rotating trajectory of the main rotor. The RF console consisted of the engine control, attitude control, and emergency control modules. Assembling the prototype concluded the mechanical development of the agricultural helicopter.

• 한국CDE학회논문집
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• 제21권2호
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• pp.111-121
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• 2016

The plant equipment usually has a long life cycle. During its O&M (Operation & Maintenance) phase, since the occurrence of an accident of offshore plant equipment causes catastrophic damage, it is necessary to make more efforts for managing critical offshore equipment. Nowadays due to the emerging ICTs (Information Communication Technologies) and sensor technologies, it is possible to gather the health status data of important offshore equipment and their environment data, which leads to much concern on CBM (Condition-Based Maintenance). In this study, we will propose an approach to estimate the remaining lifetime of an offshore plant equipment (pump tower) based on gathered ocean environment data.

• 대한안전경영과학회지
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• 제12권4호
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• pp.207-213
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• 2010

Now days, the marketing environment is rapidly changed. Therefore, a lot of companies try to reduce production cost. Especially, Design is a important activities in new product development. While the concepts of design for manufacturable and concurrent engineering have made significant advances in integrating the design function with other areas in the firm. There are still major gaps in timely and accurate costing information available to designers. Inappropriate design could result in high redesign cost and delay in product relation. The generation of design and improvement is a time-consuming and mentally exhaustion process. It involves combining design features to generate as many potential design as possible. As not all features combinations are feasible, decision-makers have to narrow down the potential solutions and subsequently select appropriate design for further development. This new study is composed of 3 steps aiming at the Low Cost Design of the product. The three steps are consisted that setting up the target Cost, estimating the current functional cost, the design of a unit's reviewing according to the priority of the difference between the target cost and the functional cost.

• 시스템엔지니어링학술지
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• 제7권2호
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• pp.1-5
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• 2011

The purpose of the Environment Design (ED) for Main Control Room (MCR) of Nuclear Power Plant (NPP) is to provide and create an optimal working space to be free from physical, physiological and mental stress as well as environmental discomfort, based on the previous environment design experiences and to recommend the best ED including the color, the lighting and the interior design. Environment Design consists of three main areas: Human factor engineering design, Interior design with color design, and Lighting design. These design areas have been interactively cooperated in a way that each design specialist would share the objectives and concepts of the Environment Design for MCR. The specialists for Human Factors Engineering design had a corporative role in such a way to provide the guidelines for MCR design suitability of Interior and Lighting design considering the Human System Interface (HSI) safety concerns. This paper describes fruitful efforts to create the best fit for MCR ED among several design proposals with the design recommendations, impacts, and contributions to NPP environment.

• 대한인간공학회지
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• 제26권3호
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• pp.111-115
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• 2007

Design equations for anthropometric product design are developed by considering the geometrical relationships of design dimensions and anthropometric dimensions. The present study applied the design structure matrix (DSM) method to the development of design equations for a computer workstation, and compared design values from the design equations with corresponding design values of ergonomic recommendations and existing products. The relationships between design dimensions (e.g., legroom and worktable) were analyzed by a DSM, and then the application order of design equations (e.g., seatpan, backrest, armrest, legroom, and worktable in descending order) was determined. Next, design equations were developed by analyzing the geometric relationships between computer workstation design dimensions and anthropometric dimensions. Finally, design values for a computer workstation were determined by considering a standard posture defined and representative human models (5th, 50th, 95th %ile). The design values calculated using the design equations were similar with those of ergonomic recommendations found in literature and two commercial products measured in the study; however, some design values (e.g., seatpan height) were different due to discrepancy in standard posture. The DSM method would be utilized to systematically analyze the relationships between design dimensions for anthropometric product design.

• 상하수도학회지
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• 제30권3호
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• pp.225-231
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• 2016

Peak load rate(i.e., maximum daily flow/average daily flow) has not been considered for industrial water demand planning in Korea to date, while area unit method based on average daily flow has been applied to decide capacity of industrial water treatment plants(WTPs). Designers of industrial WTPs has assumed that peak load would not exist if operation rate of factories in industrial sites were close to 100%. However, peak load rates were calculated as 1.10~2.53 based on daily water flow from 2009 to 2014 for 9 industrial WTPs which have been operated more than 9 years(9-38 years). Furthermore, average operation rates of 9 industrial WTPs was less than 70% which means current area unit method has tendency to overestimate water demand. Therefore, it is not reasonable to consider peak load for the calculation of water demand under current area unit method application to prevent overestimation. However, for the precise future industrial water demand calculation more precise data gathering for average daily flow and consideration of peak load rate are recommended.

• 한국산학기술학회논문지
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• 제21권7호
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• pp.66-72
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• 2020

급격히 변화하고 있는 21세기 현대 사회에서 국가 경제력을 갖춘 인재 양성을 위해 최근 미국, 영국 등 선진국을 중심으로 STEM(Science Technology Engineering Mathematics) 교육이 점차 강조되고 있으며 우리나라에서는 Arts(예술)를 추가하여 STEAM(Science Technology Engineering Arts Mathematics) 교육이 나타났다. 융합(STEAM) 교육 목표는 기존의 주입식 및 암기식 교육이 아닌 학습자들의 흥미도와 학습에 대한 동기 부여를 강화하여 체험, 탐구, 실험이 중심이 되어 융합적 사고와 실생활 문제를 해결할 수 있는 능력을 갖추어 국가 경제력을 강화하는 것이다. 본 연구가 이루어진 Y 초등학교에서는 세계 공용어로 자리매김한 영어와 4차 산업 혁명으로 인한 발전으로 거의 모든 분야에서 찾아볼 수 있는 과학을 융합하여 학습자들이 주도적으로 수업에 참여하여 문제해결능력을 향상할 수 있는 PBL 모형과 ADDIE 모형이 기반이 된 수업 모형을 설계하였다. 이 모형은 크게 5가지 절차로 분석(Analysis), 설계(Design), 개발(Development), 실행(Implementation), 평가(Evaluation)로 구성된다. 국가 경제력을 갖춘 인재 양성이라는 목표도 중요하지만, 교육 현장에 있는 교사들이 융합(STEAM)교육의 중요성을 인지하고 이에 알맞은 수업 설계에 관한 연구가 지속하며 강화되어야 한다.