• International Journal of Aeronautical and Space Sciences
• /
• 제16권4호
• /
• pp.624-635
• /
• 2015

Design space exploration has been much neglected in aircraft conceptual design phase, which often leads to a waste of time and cost in design, manufacture and operation process. It is necessary to explore design space based on operational system-of-systems (SoS) simulation during the early phase for a competitive design. This paper proposes a methodology to analyze aircraft performance parameters in four steps: combination of parameters, object analysis, operational simulation, and key-parameters analysis. Meanwhile, the design space of an unmanned aerial vehicle applied in earthquake search and rescue SoS is explored based on this methodology. The results show that applying SoS simulation into design phase has important reference value for designers on aircraft conceptual design.

• 국제학술발표논문집
• /
• The 6th International Conference on Construction Engineering and Project Management
• /
• pp.708-709
• /
• 2015

In Korea, a series of noise-reduced aluminum forms are being recently used in apartment housing construction. However, their complicated and time-consuming work processes, and the noise which is still generated due to the inherent property of aluminum when especially installing and dismantling them are have been pointed out as a problem to be certainly solved for increasing their practical use in construction sites. The primary objectives of this study are to propose a conceptual design of a newly designed noise-reduced aluminum form in which the noise can be enormously decreased during form works. The conceptual design in this study improved problems of conventional system aluminum forms, and, later, a system aluminum form developed based on this conceptual design will be able to ensure noise-reduction and safety as well as excellent applicability.

• Nuclear Engineering and Technology
• /
• 제54권11호
• /
• pp.4125-4133
• /
• 2022

KAERI (Korea Atomic Energy Research Institute) developed the conceptual design of PGSFR (Prototype Gen-IV Sodium Cooled Fast Reactor) and Burner Reactor. Since the reactor characteristics of the PGSFR and Burner Reactor are different, the shape, size and the arrangement of the main components in the reactors must be different. Therefore, the conceptual design for the fuel handling and transfer systems needs to be performed coinciding with the structure of the reactor. Especially, because a redan structure dividing hot and cold pool is installed in the reactor vessel, the conceptual design of the fuel handling and transfer system largely changes depending on the location of the redan structure. Various elements of the conceptual design and an integral arrangement for the fuel handling and transfer system were arranged according to the characteristics, sizes and shapes of the reactors. In this paper, the conceptual designs of the fuel handling and transfer system for PGSFR and Burner Reactor are described. Especially, an A-frame method is selected as the fuel handling and transfer system for the Burner Reactor, considering the layout of the internal structure. The tilt angle, diameter and length of A-frame is determined and the strength evaluation of the A-frame is performed.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 1996년도 춘계학술대회 논문집
• /
• pp.531-535
• /
• 1996

Computer aided conceptual solution of engineering problems can be effectively implemented by qualitative reasoning based on a physical model. Qualitative reasoning needs modeling paradigm which provides intellignet control of modeling assumptions and robust inferences without quantitative information about the system. We developed reasoning method using new algebra of qualitative mathematics. The method is applied to a conceptual design scheme of anadaptive control system of cutting process. The method identifies differences between proportional and proportional-integral control scheme of cutting process. It is shown that unfeasible investment could be prevented in the early conceptual stage by the qualitative reasoning procedures proposed in this paper.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 1996년도 추계학술발표회논문집(1)
• /
• pp.289-294
• /
• 1996

Feasibility study on conceptual design tool for liquid metal reactor has been conducted to optimize the thermohydraulic and neutronic design parameters. To accomplish this task the neutronic code PRISM, fuel performance code and scaling method have been included into the conceptual design support system. ALMR(PRISM 303MWe) has been adopted as the reference plant and principally according to the power level, conceptual design parameters are optimized so that energy balance and neutronics balance seem to be satisfied. This paper presents only the results of optimization on primary system including the IHX system.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 22-24 Oct. 1991
• /
• pp.1633-1638
• /
• 1991

A CAI system is developed to support the Instruction of an aircraft conceptual design for aeronautical engineering students. Three system concepts are proposed and an Object-Oriented approach is applied to construct the system. The system has three major functions to perform a conceptual design: (1) the system stores modular data and empirical formulas used for a wide range of aircraft design tasks from light aircraft to long range airliners. (2) Implementation of modules by message passing makes it easy to realize the various design tasks required for different design requirements. (3) The system allows users to study trade-off among the requirements. The system has a graphical user Interface which allows users to communicate with the system interactively. The effectiveness of the system Is demonstrated through some case studies.

• 항공우주시스템공학회지
• /
• 제8권1호
• /
• pp.36-41
• /
• 2014

KAFASAT is a CubeSat which has a high level mission of testing the possibility of establishing the LEO satellite constellation providing the role of communication nodes and quasi-realtime image recognition of battlefield in accordance with the aspect of future-war-environment. The high level mission is developed using the Pugh selection method, which is one of system engineering tools. In order to accomplish the high level mission objectives and deduce engineering level requirements, system engineering tools such as Analytic Hierarchy Process and Quality Function Deployment are used. The subsystem synthesis in the context of system engineering process is done using a developed integrated design environment. The paper also includes the conceptual design results of the KAFASAT, which can be used as a baseline for upcoming preliminary design.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2005년도 추계학술대회 논문집
• /
• pp.299-304
• /
• 2005

This paper describes the conceptual of device attached to rotary type sliding door system satisfying customer's reguirements. The TRIZ (Russian theory of Inventive Problem Solving) and Axiomatic Design methods are used for generating new ideas at the conceptual design stage efficiently. The ideas will be implemented in real products.

• 항공우주기술
• /
• 제1권1호
• /
• pp.42-54
• /
• 2002

1997년 12월 다목적 실용위성 1호의 설계가 실제적으로 종료된 이후 항공우주연구원에 서는 다목적 실용위성2호에 대한 개념설계가 시작되었다. 설계의 기본 방향은 다목적 실용위성 1호 설계를 근간으로 하여 새로운 탑재체를 장착하는 것으로 설정되었으며 초기 설계 단계에서는 개략적인 탑재체에 대한 정보를 이용하여 전체 시스템의 구성에 대한 연구가 주로 이루어졌다. 본 논문에서는 예비설계의 주요 단계별로 수행하였던 기계 시스템 분야의 설계내용을 수록하였으며 향후 차세대 위성의 타당성 검토나, 예비설계 수행 시 참고가 될 수 있도록 하였다.

• 한국항공우주학회지
• /
• 제32권10호
• /
• pp.134-141
• /
• 2004

본 논문은 위성 통신시스템의 개념 설계를 위한 프로그램 개발과 설계 과정의 분석 결과를 보여준다. 이를 위해 10kg에서 200Kg 사이의 200여개 저궤도 소형위성을 대상으로 데이터베이스를 구축하였고, 이를 바탕으로 위성 통신시스템 초기 설계 시 필요한 파라미터들의 일반적인 값을 도출하여 적용하였다. 위성의 임무에 상관없이 일반적인 위성 통신 시스템의 개념 설계와 일련의 과정을 일반화한 프로그램을 개발하였다. 본 논문에서는 일반적인 초기 통신시스템 설계과정을 프로그램으로 구현하기 위해 각각의 과정을 구분하고 과정마다 필요한 파라미터들을 정의하였다. 또한 데이터베이스 분석을 통해 파라미터가 개념 설계에 적용되는 과정을 살펴보고 이를 프로그램으로 구현하여 시뮬레이션을 통해 전체 알고리즘에 대한 타당성을 증명하였다.