• Bulletin of the Society of Naval Architects of Korea
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• v.30 no.4
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• pp.27-32
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• 1993

본 연구에서는 첫째로, 자체적으로 정립한 시스템 개발방법론인 객체지향 기술을 적용하여 선 체설계 전산시스템의 요구사양 및 기능분석을 수행하여, 유닛모델 개념(선체의 각 부분에서 보 여지는 특징적인 구조를 유닛으로 하고 선체구조정보를 설계변수화하여 파라메트릭 설계기법을 이용하여 모델링하는 방법임)의 초기 선체 모델링기법을 제시하고 이를 검증하므로써, 유조선 화물창부의 초기 모델링을 통한 구조설계 대안의 신속한 검토와 초기물량의 정확한 산출이 가 능하도록 하였다. 둘째로, 모델링 기술 분야에서는, 선박제품 모델링을 위한 기반 기술로써(여 기서, 제품모델링이란 최근 CAD/CAM 및 CIM 분야에서 거론되는 기술분야로서, 설계 및 생산의 대상이 되는 제품의 제반정보를 전산기 내에서 모델로써 표현하고자 하는 시도임) 선박 제품 모델의 표현방법론과 내부처리 기법을 정의하였고, 이 방법론에 다라 객체지향 구\ulcorner배치 프로 그램(OO_COMDEF)을 개발하여 본 연구에서 제시한 제품모델의 표현방법론을 검증하였다. 셋 째로 응용 프로그램 개발 분야에서는 선체 상세설계를 지원할 수 있는 시스템 설계를 수행하 였고, 이를 토대로 이중선체 유조선의 화물창부의 Hopper Tank부의 Stiffener 배치를 자동적으로 생성할 수 있는 시험용 프로그램을 개발하여 그 개념을 검증하였다.

• 한국공간정보시스템학회:학술대회논문집
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• 2004.05a
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• pp.29-36
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• 2004

In this paper, a study of damage detection for 2-Dimensional Truss Structures using the parametric projection filter theory is presented. Many researchers are interested in inverse problem and one of solution procedures for inverse problems that are very effective is the approach using the filtering algorithm in conjunction with numerical solution methods. In filtering algorithm, the Kalman filtering algorithm is well known and have been applied to many kind of inverse problems. In this paper, the Parametric projection filtering in conjunction with structural analysis is applied to the identification of damages in 2-D truss structures. The natural frequency and modes of damaged truss model are adopted as the measurement data. The effectiveness of proposed method is verified through the numerical examples.

• Journal of Ocean Engineering and Technology
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• v.13 no.2 s.32
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• pp.176-185
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• 1999

Currently, large size shipyards have performed the generating of piece and the nesting using shipbuilding-oriented CAD program, which requires high skilled operator and costs a lot. So, medium and small size shipyards have pursued other way to obtain the generating and the nesting due to an economic and a technical problems. Therefore, this research is to develop a program for the generating of pieces with parametric macro method and a STRIP program for the nesting of pieces by PC.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.577-578
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• 2019

지향성 스피커는 초음파를 이용하여 소리에 직진성을 부여하여 특정 방향으로만 소리를 전달할 수 있다. 이러한 지향성 스피커는 초음파의 직진성 때문에 소리를 청취함에 있어 일반 스피커와 달리 전달감이 풍부하지 못하다는 단점이 있다. 본 논문에서는 청취자에게 음원이 전달되는 과정을 모델링한 머리전달함수를 사용한다. 지향성 스피커를 통하여 방사되는 음원에 머리전달함수를 전처리하여 전달감을 개선한다.

• Journal of KIBIM
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• v.3 no.4
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• pp.11-18
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• 2013

Modular technology has become a major issue of the construction industries to enhance their productivity. Modular bridge construction generally requires the collaboration between the contractor, designer, fabricator and constructor. Therefore, a readily accessible information model based on BIM technology should be provided for their communication during a construction project life-cycle. In this study, BIM based 3D information modeling was carried out for the modular bridge pier. First, the product breakdown structure (PBS) and level of detail (LOD) of the pier were defined. Based on them, 3D models were created by using parametric modeling method. In addition, database was constructed for the exchange of geometry and property data of 3D models. Finally, application areas of 3D information model were suggested, including the quantity estimation and the 4D simulation.

• Korean Journal of Computational Design and Engineering
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• v.15 no.6
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• pp.467-475
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• 2010

Due to the needs of design optimization and productivity for modernized Korean traditional house, standardization of Korean traditional building components is proceeding by BIM (Building Information Modeling). Currently, most of BIM software support object-based parametric modeling. By means of parameterized Korean traditional building components, the shape and assembly relation can be controlled. Although IFC(ISO/PAS 16739), which is an international standard in the AEC field, has been developed for information exchange among BIM software, IFC and other existing common data formats cannot be exchangeable parametric information. For the exchangeable parametric information within IFC, the authors defined meta-data by using Pset(Property-Set). The authors analyzed results about interoperability test in Revit $Architecture^{TM}$, $ArchiCAD^{TM}$ and Digital $Project^{TM}$. In order to solve found problems, the authors developed a translator to improve interoperability among BIM software.

• Journal of the Korean Society of Mechanical Technology
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• v.13 no.3
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• pp.73-79
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• 2011

In this study, an analytical realization of end-milling system was introduced using recursive parametric modeling analysis. Also, the numerical mode analysis of end-milling system with different conditions was performed systematically. In this regard, a recursive least square modelling algorithm and the natural mode for real part and imaginary one was discussed. This recursive approach (RLSM) can be adopted for on-line end-milling identification. After experimental practice of the end-milling, the end-milling force was obtained and it was used for the calculation of FRF (Frequency response function) and mode analysis. Also the FRF was analysed for the prediction of a end-milling system using recursive algorithm.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.163-164
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• 2023

The technical proposal bidding system emphasizes the evaluation of the construction company's technical capabilities, with the aim of improving the quality and cost-effectiveness of the construction. However, in the VE analysis and proposal process for technical proposal bidding, the ideas are often reused from similar past construction projects, and the application of new construction technologies/methods is often lacking. Therefore, this study proposes a methodology for managing VE proposal information by integrating it into a BIM model using parametric modeling. This research developed database based on the existing VE proposals and new construction technology/method information from the Korea Institute of Civil Engineering and Building Technology. And by using parametric modeling, the proposed method integrate the VE database with BIM model. The methodology proposed in this study is expected to improve the reliability and effectiveness of VE-related idea proposals in technical proposal bidding.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.3
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• pp.74-84
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• 2015

The core activities of a bicycle manufacturer are design, engineering analysis, and manufacturing. Therefore, it is important to develop a configuration design system for bicycles in order to automate the design process and facilitate the use of design data in engineering analysis and manufacturing. In this paper, we present a method to develop a bicycle configuration design system based on the part-shape information model. The proposed method enables the construction of a CAD library using modeling functions with equations and parameters that are common to most 3D mechanical CAD systems. Furthermore, the part-shape information model ensures the independence between the configuration design system and the library, making it possible to extend the CAD library flexibly without changing the system architecture.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.2
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• pp.299-308
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• 2008

This paper proposes a new design specification-based band fault modelling technique that can test design specification in a time domain. The band fault model is defined and the conditions of band fault model are gained as normal operation regions are defined. And the conditions of band fault model are used in a 5.25GHz low noise amplifier, then 9 band fault models that can detect hard and parametric faults of active and passive devices are obtained.