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정원지(W. J. Chung),송태진(T. J. Song),정동원(D. W. Jung),방덕제(D. J. Bang),윤영민(Y. M. Yoon),김기현(K. H. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
This research is that analyze multi-body system that have flexibility. We composed system consisted of crane, part of traveling and robot. And we analyzed the aspect of vibration when this system runs using ADAMS. Through this research we can analyze vibration and displacement of end-effect pill of the large size robot. And this research can become reference that is going to analyze resemblant dynamic system.
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LCD 이송장치 Column 부의 식스 시그마 강건설계를 위한 연구
정동원(D. W. Jung),정원지(W. J. Chung),송태진(T. J. Song),방덕제(D. J. Bang),윤영민(Y. M. Yoon) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
This research studied robust design of column part for LCD transfer system. 1<SUP>st</SUP> DOE(Design of Experiment)was conducted to find out main effect factors. 36 experiments were performed and their results were shows that the geometric parameters(Low-length, Side-length, Upper-thickness, Middle-thickness)are more important than other factors. The main effect plots shows that the maximum deflection of column is minimized with increasing Low-length, Side-length, underthickness and Middle-thickness. 2<SUP>nd</SUP> DOE was conducted to obtain RMS(Response Surface Method)equation 25 experiments were conducted. The CCD(Central Composite Design)technique with four factors were used. The coefficient of determination (R²) for the calculated RSM equation was 0.986. Optimum design was conducted using the RSM equation Multi-island genetic algorithm was used to optimum design. Optimum value for Low-length, Side-length, Upper-thickness and Middle-thickness were 299.8㎜, 180.3㎜, 21.7㎜, 21.9㎜ respectively. An approximate value of 5.054㎜ in deflection was expected to be a maximum under the optimum conditions. Six sigma robust design was conducted to find out guideline for control range of design parameter. To acquire six sigma level reliability, the standard deviation of design parameter should be controlled within 2% of average design value.
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정원지(W. J. Chung),정동원(D. W. Jung),김호종(H. J. Kim),윤영민(Y. M. Yoon) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This paper presents the robust design of gripper part for a high-speed LCD (Liquid Crystal Display) transfer system. In this paper, the 1st DOE (Design of Experiment) is conducted to find out main-effect factors for the design of gripper part. Thirty-six experiments are performed using ANSYS<SUP>ⓡ</SUP> and their results are statistically analyzed using MINITAB<SUP>ⓡ</SUP>, which shows that the factors, i.e., First-width, Second-width, Rec-width, and thickness of gripper part, are more important than other factors. The main effect plots shows that the maximum deflection and mass of gripper part are minimized by increasing First-width, Second-width, Rec-width and thickness. The 2nd DOE is conducted to obtain RSM (Response Surface Method) equation. The CCD (Central Composite Design) technique with four factors is used. Optimum design is conducted using the RSM equation. Genetic algorithm is used for optimal design. Six sigma robust design is conducted to find out a guideline for control range of design parameter. To obtain six sigma level reliability, the standard deviations of design parameters are shown to be controlled within 5% of average design value..
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식스 시그마 기반 LCD이송장치의 Gripper부 강건설계에 관한 연구
정원지(W. J. Chung),정동원(D. W. Jung),김상부(S. B. Kim),윤영민(Y. M. Yoon) 한국생산제조학회 2006 한국생산제조학회지 Vol.15 No.5
This paper presents the robust design of gripper part for a high-speed LCD(Liquid Crystal Display) transfer system. In this paper, the 1<SUP>st</SUP> DOE(Design of Experiment) is conducted to find out main-effect factors for the design of gripper part. Thirty-six analysis are performed using ANSYS<SUP>ⓡ</SUP> and their results are statistically analyzed using MINITAB<SUP>ⓡ</SUP>, which shows that the factors, i.e., First-width, Second-width, Rec-width, and thickness of gripper part, are more important than other factors. The main effect plots shows that the maximum deflection and mass of gripper part are minimized by increasing First-width, Second-width, Rec-width and thickness. The 2<SUP>nd</SUP> DOE is conducted to obtain RSM(Response Surface Method) equation. The CCD(Central Composite Design) technique with four factors is used. Optimum design is conducted using the RSM equation. Genetic algorithm is used for optimal design. Six sigma robust design is conducted to find out a guideline for control range of design parameter. To obtain six sigma level quality, the standard deviations of design parameters are shown to be controlled within 5% of average design value.
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DFSS를 이용한 상용차용 변속 배력장치의 BALL-STOP부 강건설계에 관한 연구
정원지(W. J. Chung),정동원(D. W. Jung),윤찬헌(C. H. Yoon) 한국생산제조학회 2006 한국생산제조학회지 Vol.15 No.4
The important function of Ball-Stop part is to operate power shift using suitable pneumatic force for vehicle with more than 5 ton when a driver changes gear. In this paper, we have applied the concept of the DFSS(Design for Six Sigma) to robust design of Ball-Stop part. First, we have found the control factors which could mainly influence the performance of the Ball-Stop part. The simulations of contact between head and detent pin was performed to evaluate effect of control factors according to DOE(Design of experiment) by using ADAMS<SUP>®</SUP><SUP></SUP>. Finally, we have obtained optimal levels of each factors using MINITAB<SUP>®</SUP>. Through the comparison of the result of optimized design with one of inintial design, we have verified the usefulness of DFSS method which can be applied to robust design of mechanical systems.
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