분산객체를 응용한 RP Preprocessor의 기능 구현

지해성(Hae Seong Jee),이승원(Seung Won Lee) Korean Society for Precision Engineering 2003 한국정밀공학회지 Vol.20 No.2

디지털 생산 기법을 이용한 조선소 내 단위공장의 가공일정 생성

김인배(In Bae KIM),지해성(Hae Seong Jee),임현준(Hyun June Yim),권영대(Young Dae Kwon),우종훈(Jong Hun Woo) (사)한국CDE학회 2005 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2005 No.1

공학교육에서의 디자인 및 창의적 설계교육

한병기(Byung-Kee Han),지해성(Hae-Seong Jee) 한국공학교육학회 2006 공학교육연구 Vol.9 No.4

2000 년대에 들어와 교육 현장에서는 국가발전의 주요한 원동력 중 하나인 국제경쟁력을 갖춘 기술인 력을 양성하기 위한 공학교육 개선에 관한 연구가 활발하게 진행되고 있고 , 한국공학인증체계 ( ABEEK ; Accreditation Board for Engineering Education of Korea ) 가 마련되어 생산 현장에서 필요로 하는 졸업 생을 배출하기 위한 교육 프로그램의 자격기준을 제시하여 이를 충족하도록 하고 있다 . 본 논문은 홍익 대학교의 기계시스템디자인공학과의 사례를 중심으로 공학교육에서의 디자인 및 창의적 설계교육 체계와그 수행방법을 다루고 있다 . 디자인 및 창의적 설계 교육은 10 여년전부터 홍익대학교 공학교육의 중심개 념으로서 꾸준히 실행되어왔으며 본문에서는 이를 구현하기 위한 관련 교과목체계의 정립과 본교에서 지향하고자 하는 교육 특성화 목표를 소개한다 . HIU ( Hong - Ik University ) has inculcated students with values necessary to serve society as independent , creative , and cooperative professionals . In HIU , students are encouraged to foster independent thinking , free from the influence of others , but are forged to cultivate their creativity in harmony with the knowledge and experience of others . In the department of MSDE ( Mechanical and System Design Engineering ), students are educated via three major courses for targeting engineering design , Creative Engineering Design ( freshman ), Design Process ( Senior ), and Creative Product Development ( Junior ). All these courses are based on personal tool exercises for design software and hardware and team - project group activities of the students with other team members . This paper will briefly discuss the main focuses of these courses and case studies of the teaching results .

기계.시스템 디자인 공학 교과과정 개발을 위한 설문조사 사례 연구

한병기,최성준,김병주,조성산,김정수,지해성,박승호,Han Byoung-Kee,Choi Sung-Joon,Kim Byung-Joo,Cho Sung-San,Kim Jung-Soo,Jee Hae-Seong,Park Seoung-Ho 한국공학교육학회 2004 공학교육연구 Vol.7 No.2

To keep pace with rapidly changing social and technological trends, the Department of Mechanical and System Design Engineering at Hongik University is in the process of updating teaching materials and learning methodologies while evaluating/revising our existing curriculum. In order to be better apprised of the employment needs and student aspirations, we have conducted three separate but related surveys by targeting experienced professionals and managers, alumni working in industries as practising engineers, and our current students. The surveys have furnished us with valuable insights that, we hope, will lead to a new curriculum and learning methods more in tune with needs of our students as well as their future employers. Among other findings, the analysis of the survey responses points towards expansion of integrated laboratory and design experiences, cultivation of improved written and oral communication capabilities involving individual and team efforts, and development of interdisciplinary courses encompassing related fields of engineering as well as emerging fields such as nano and information technologies. 최근 홍익대학교 기계 시스템디자인공학과에서는 급변하는 시대 조류에 부응하도록 교과목 체계를 검증하고, 신규 교과목, 교수-학습 방법 및 교과과정을 개발하며, 산업체에서 필요로 하는 기술 인력을 양성하기 위해 전문가, 졸업생 및 재학생을 대상으로 설문조사를 실시하였다. 본 연구에서는 이 설문조사에 근거하여 산업체 중역과 현장 실무자가 필요로 하는 인재를 양성하는 동시에 재학생들의 요구도 충족할 수 있는 신규 교과목과 교수-학습 방법을 개발하고 적합한 교과목 체계를 검증하고자 한다. 재학생, 졸업생 및 전문가를 대상으로 한 설문조사를 분석한 결과, 신규 교과목 및 교수-학습 방법은 다양한 실습 경험 기회를 제공하고 언어 소통 능력을 교육하며 첨단/연계분야에 적합한 학과목을 개설함으로써 산업체에서 요구하는 인재를 양성하고, 재학생에게는 동기를 부여할 수 있는 방향으로 개발되어야 할 것으로 나타났다.

PSS 기반 기계장비의 사용자 요구조건 모델링

한만영(Man Young Han),허수현(Su Hyun Huh),이선호(Sun Ho Lee),지해성(Hae Seong Jee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.6

신속성형기술 전용 형상 모델링 기술 개발-표면 미세돌기의 설계

池海成 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1

This paper presents a geometrical modeling technique including an energy method for defining a regular texture field made by an RP apparatus. The texture field is supposed to be made from both a parametric surface and a non-analytic STL CAD model using an energy minimization analogy based on energy constraints. Designing surface texture for rapid prototyping, however, is difficult due to complex macro-structure of the tiny texture geometry that must be compatible with the non-traditional manufacturing method of rapid prototyping. An application of geometric modeling techniques to development of a computer-aided design tool for solving the addressed problems is proposed in this paper. Manufacturing constraints are identified, formulated, and introduced into a unified design constraints framework being incorporated into the design of a texture cell. Also, an energy minimizing parametric geometry is devised and implemented to create an optimal texture geometry.

Rp 용 조형물의 조형영상처리기술

池海成,李大善 弘益大學校 科學技術硏究所 1999 科學技術硏究論文集 Vol.10 No.1

Rapid prototyping can fabricate physical models directly from the CAD models. Since actual production of a physical model using traditional techniques has been quite expensive, a prototyping apparatus like Stereolithography can recently be used to get physical verification of a product design rapid and economic. This, however, still costs some expenses enough to take an interest in more economic methods, visual simulation techniques. Development of an intermediate geometric model of the product design and careful inspection of its virtual shape before the real fabrication take no physical cost. In this paper we propose an image simulation method especially for supporting an rapid prototyping application. The method can demonstrate its capability of image simulation by comparing the simulated images with their physical models.

STEP 표현 2차원 조형층 정밀도 향상에 관한 연구

池海成,李秉烈 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

Nowadays, there are several different CAD softwares that can create product geometries with different applications. Similarly, most recent RP processes have quite different capabilities, and most are not even isotropic, so that machine-dependent information such as part orientation, position, and size during the fabrication process becomes a crucial issue in integrating a heterogeneous environment of CAD and RP processes using the data exchange standard. Current method using the de facto industry standard STL have at times resulted in problems such as accuracy, redundancy, and integrity in its representing CAD models. STEP is the upcoming standard. Many major companies are already working with it. This is one of the biggest reason why STEP can be a useful way of exchanging CAD-SFF data. This research project proposes a method of slicing and editing STEP-based RP models for the next generation data transfer paradigm between CAD systems and RP systems using STEP. As an approach for the purpose, this proposes a method for acquiring improved accuracy of 2D sliced layers in STEP with a tentative schema of SFF process features. The new data exchange standard must be compatible with, but independent of, process fabrication features. A software implementation of visualizing, editing, and slicing CAD model based on STEP information model for a complete data exchange is also proposed. As for future works, various optimal slicing algorithm will help acquire accurate RP parts.

RP 조형용 삼각형 평면 CAD 모델의 생성

池海成,鄭海鎔 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

Rapid prototyping (RP) technologies have an ability of creating a physical part directly from its computer model by adding material on a layer by layer basis. Since actual production of a physical model using traditional techniques has been quite expensive, a prototyping apparatus like Stereolithography can recently be used to get physical verification of a product design rapid and economic. In spite of this tremendous progress in fabrication, many problems remain unsolved including several geometric issues that must be resolved in coming years before these technologies are in common use. The biggest problem lies in their standard file format for CAD data exchange. Current method using the de facto industry standard STL data format have at times resulted in problems such as accuracy, redundancy, and integrity in its representing CAD models. In this paper, a general explanation about why a next generation of data exchange standard for RP technologies is needed, why it must be based on a solid model, and what its major advantages are given.

공분산을 고려한 조립공차의 민감도 해석

蘇鉉哲,池海成 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

The most commonly used variation simulation analysis methods for assemblies have been worst case analysis, root sum square method, and Monte Carlo simulation, which the individual parts of assemblies are considered as rigid bodies. Assembly tolerance, sometimes, requires the consideration of its compliance because of potentially significant deformation during the spot-weld assembly process in automobile industry. A relationship, called sensitivity, between the assembled part deviation vector for incoming components and tooling hence has been found for a unified linear variation model. In this method, it is important to take into account of the covariance between the sources of variation as they are closely located, which is the case in most auto body assembly. This research is done on the CAVA (Compliant Assembly Variation Analysis) model, which is a variation simulation model for single station level, In the CAVA model, only results for part representation are obtained and the contact effects will be solved in the future research.