• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1995년도 봄 학술발표회 논문집
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• pp.176-183
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• 1995

The design process of pre-cast concrete member needs various design parameters and the engineer's experiences. The introduction of knowledge-based system in the design of pre-cast concrete member enables us to design complicated members using the designer's heuristics. The objectives of this research are to study useful methodology for representing knowledge and data in the development of knowledge-based system and to show the application of methodology by developing a prototype sysytem for design of pre-cast concrete member. This paper nrst describes methodology for building knowledge-based system. It then presents knowledge-based system for pre-cast concerete member design.

• 공학교육연구
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• 제15권5호
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• pp.31-35
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• 2012

A new obligatory subject, Computer Programming IV, is organized in the Department of Informatics, Faculty of Engineering, Yamagata University. The purposes of the subject are as follows: (1) Attachment to each laboratory for bachelor thesis was usually at the initial stage of the student's fourth academic year. This subject actually moves up the attachment because students are tentatively attached to a laboratory for this subject. The interval to complete their bachelor thesis is extended by half a year. (2) In each laboratory, students cooperate with each other to complete their project. The project becomes capstone design which JABEE (Japan Accreditation Board for Engineering Education) is recently emphasizing. We not only explain the introduction of this subject, but also report some case studies.

• 한국CDE학회논문집
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• 제1권3호
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• pp.234-241
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• 1996

Recently, Genetic Algorithms(GAs), which consist of genetic operators named selection crossover and mutation, are widely adapted into a search procedure for structural optimization. Contrast to traditional optimal design techniques which use design sensitivity analysis results, GAs are very simple in their algorithms and there is no need of continuity of functions(or functionals) any more in GAs. So, they can be easily applicable to wide territory of design optimization problems. Also, virtue to multi-point search procedure, they have higher probability of convergence to global optimum compared with traditional techniques which take one-point search method. The introduction of basic theory on GAs, and the application examples in combination optimization of ten-member truss structure are presented in this paper.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.938-941
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• 2005

Recently We make a study of the process expert system model in 2005 process expert system concepts is applied to the digital meister expert system development. Well-designed expert systems imitate the reasoning processes experts use to solve specific problem. Specially, expert systems are used to the engineer in manufacturing industry fur the process control, production management and system management. In this paper, we propose the digital moister expert system fur product design process in manufacturing industry and we present introduction and contents of design process expert system methodology and software far the air purifier design system.

• 국제초고층학회논문집
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• 제8권4호
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• pp.265-273
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• 2019

The purpose of this review paper is to briefly describe main the features of novel procedures developed by the National of Standards and Technology (NIST) for the design of tall buildings. Topics considered in the paper include: the division of tasks between wind and structural engineers; the determination of wind effects with specified mean recurrence intervals by accounting for wind directionality; the risk-consistent design of structures subjected to multiple wind hazards; iterative dynamic analyses and member sizing, including the use of modern optimization approaches; and commonalities of and differences between Database-assisted Design (DAD) and Equivalent Static Wind Loads procedures. An example of the application of the DAD procedure is presented for a reinforced concrete structure. Also included in the paper is an introduction to ongoing research on the estimation of wind load factors or of augmented design mean recurrence intervals commensurate with the uncertainties in the factors that determine the wind effects.

• 국제초고층학회논문집
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• 제3권4호
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• pp.311-323
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• 2014

This paper introduces recent applications of three-dimensional building/construction data modeling (3D) and building information modeling (BIM) to large-scale complex building construction projects in Japan. Recently, BIM has been utilized as a tool in construction process innovation through planning, design, engineering, procurement and construction to establish a front-loading-type design building system. Firstly, the background and introduction processes of 3D and BIM are described to clarify their purposes and scopes of applications. Secondly, 3D and BIM applications for typical large-scale complex building construction projects to improve planning and management efficiency in building construction are presented. Finally, future directions and further research issues with 3D and BIM applications are proposed.

• 공학교육연구
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• 제16권2호
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• pp.78-85
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• 2013

본 연구에서는 충남대학교 환경공학과 1학년 학생을 대상으로 PBL 활용 창의설계입문의 교과목 운영 사례를 분석 제시하였다. 본 교과목은 공과대학 환경공학 전공을 선택하여 대학에 입학한 1학년 학생들을 대상으로 PBL 교수법을 통해 창의적인 사고와, 자기주도 학습, 문제해결능력을 배양하고자 하였다. 또한 학생들이 환경공학 분야의 창의적 공학설계 개념 및 방법을 배우고 창의적인 아이디어를 도출하고 궁극적으로 공학 분야의 전공 설계에 대한 관심과 흥미를 유발하고자 하였다. 본 논문에서는 환경공학 분야의 창의설계입문 교과목에 대한 PBL 교육을 개발하고 적용하여 학생들의 변화와 학습 성과를 심층 학생설문조사 및 강의평가를 통해 그 결과를 분석하였으며, 다음과 같이 그 결과를 요약할 수 있다. 1. PBL 학습법을 적용한 창의설계입문 교과목은 학습 성과분석 결과, 학생 스스로 문제해결 과정에서 팀워크의 중요성과 팀원으로서의 책임감을 깨닫는 계기가 되었다는 것이 가장 높게 나타났다. 또한 문제해결 과정에서 의사소통의 중요성과 효과적인 의사전달 능력을 배양하는 효과를 가져왔다. 아울러 학생들이 스스로 사고하는 능력과 창의성의 중요성, 팀 협동 능력이 향상되었다. 2. PBL 활용 창의설계입문의 교과목 수강을 통해 학생들이 대체로 매우 만족하고 우수하다는 평가가 나타났으며, 특히 교수와 조교의 충분한 의사소통, 역할에 대해 만족하는 것으로 나타났다. 3. PBL-문제 제시를 통해 학생들로 하여금 흥미유발과 동기부여가 되었으며 공학설계 주제에 대해 창의적인 아이디어를 도출하고 논의하고 이를 실제 설계 제작하였다. 구두발표회와 시연회를 통해 의사전달 능력을 배양하였으며, 학생들이 설계에 대한 흥미를 느끼며 직접 체험하는 효과를 거두었다. 4. 그러나 향후 PBL 활용창의설계입문 교과목 교육 시 PBL문제 제시의 수, 충분한 예산 확보 방안, 팀원 간 갈등 예방 등에 대한 체계적인 준비와 개선이 필요하다. 이상을 종합하여 요약한다면 충남대학교 공과대학 환경공학과 1학년 학생들을 대상으로 PBL 활용 창의설계입문 교과목은 학생들로 하여금 다양한 학습 성과를 거두었다. 향후 이러한 PBL 활용 공학설계입문 교과목이 지속적으로 보완되어 개선된다면 학생들이 자기주도학습 능력을 배양하고 창의적인 아이디어를 창출하여 응용하고 관련 공학 설계 지식을 배우고 문제해결을 위한 창의성 배양에 기여를 할 수 있다.

• Advances in aircraft and spacecraft science
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• 제4권3호
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• pp.297-316
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• 2017

With rapid growth in the complexity of large scale engineering systems, the application of multidisciplinary analysis and design optimization (MDO) in the engineering design process has garnered much attention. MDO addresses the challenge of integrating several different disciplines into the design process. Primary challenges of MDO include computational expense and poor scalability. The introduction of a distributed, collaborative computational environment results in better utilization of available computational resources, reducing the time to solution, and enhancing scalability. SORCER, a Java-based network-centric computing platform, enables analyses and design studies in a distributed collaborative computing environment. Two different optimization algorithms widely used in multidisciplinary engineering design-VTDIRECT95 and QNSTOP-are implemented on a SORCER grid. VTDIRECT95, a Fortran 95 implementation of D. R. Jones' algorithm DIRECT, is a highly parallelizable derivative-free deterministic global optimization algorithm. QNSTOP is a parallel quasi-Newton algorithm for stochastic optimization problems. The purpose of integrating VTDIRECT95 and QNSTOP into the SORCER framework is to provide load balancing among computational resources, resulting in a dynamically scalable process. Further, the federated computing paradigm implemented by SORCER manages distributed services in real time, thereby significantly speeding up the design process. Part 1 covers SORCER and the algorithms, Part 2 presents results for aircraft panel design with curvilinear stiffeners.

• Advances in aircraft and spacecraft science
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• 제4권3호
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• pp.317-334
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• 2017

With rapid growth in the complexity of large scale engineering systems, the application of multidisciplinary analysis and design optimization (MDO) in the engineering design process has garnered much attention. MDO addresses the challenge of integrating several different disciplines into the design process. Primary challenges of MDO include computational expense and poor scalability. The introduction of a distributed, collaborative computational environment results in better utilization of available computational resources, reducing the time to solution, and enhancing scalability. SORCER, a Java-based network-centric computing platform, enables analyses and design studies in a distributed collaborative computing environment. Two different optimization algorithms widely used in multidisciplinary engineering design-VTDIRECT95 and QNSTOP-are implemented on a SORCER grid. VTDIRECT95, a Fortran 95 implementation of D. R. Jones' algorithm DIRECT, is a highly parallelizable derivative-free deterministic global optimization algorithm. QNSTOP is a parallel quasi-Newton algorithm for stochastic optimization problems. The purpose of integrating VTDIRECT95 and QNSTOP into the SORCER framework is to provide load balancing among computational resources, resulting in a dynamically scalable process. Further, the federated computing paradigm implemented by SORCER manages distributed services in real time, thereby significantly speeding up the design process. Part 1 covers SORCER and the algorithms, Part 2 presents results for aircraft panel design with curvilinear stiffeners.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.1943-1945
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• 2001

In this paper, we present an adaptive output feedback control scheme for a class of uncertain nonlinear output-feedback form with time-varying parameters to which adaptive observer backstepping technique may not be applicable directly. In observer design, with the introduction of design function, we can deal with time-varying parameters in a very effective way. By the presented scheme, estimation error can be tuned to a desired small region around the origin via the design constants. Consequently, the observer with the presented design functions and the backstepping methodology achieve a robust regulation of the output tracking error while maintaining boundedness of all the signals and states.