곡가공 프로세스를 고려한 곡판 분류 알고리즘
An Algorithm of Curved Hull Plates Classification for the Curved Hull Plates Forming Process
1
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
In general, the forming process of the curved hull plates consists of sub tasks, such as roll bending, line heating, and triangle heating. In order to complement the automated curved hull forming system, it is necessary to develop an algorithm to classify the curved hull plates of a ship into standard shapes with respect to the techniques of forming task, such as the roll bending, the line heating, and the triangle heating. In this paper, the curved hull plates are classified by four standard shapes and the combination of them, or saddle, convex, flat, cylindrical shape, and the combination of them, that are related to the forming tasks necessary to form the shapes. In preprocessing, the Gaussian curvature and the mean curvature at the mid-point of a mesh of modeling surface by Coon’s patch are calculated. Then the nearest neighbor method to classify the input plate type is applied. Tests to verify the developed algorithm with sample plates of a real ship data have been performed.
Abstract
In general, the forming process of the curved hull plates consists of sub tasks, such as roll bending, line heating, and triangle heating. In order to complement the automated curved hull forming system, it is necessary to develop an algorithm to classify the curved hull plates of a ship into standard shapes with respect to the techniques of forming task, such as the roll bending, the line heating, and the triangle heating. In this paper, the curved hull plates are classified by four standard shapes and the combination of them, or saddle, convex, flat, cylindrical shape, and the combination of them, that are related to the forming tasks necessary to form the shapes. In preprocessing, the Gaussian curvature and the mean curvature at the mid-point of a mesh of modeling surface by Coon’s patch are calculated. Then the nearest neighbor method to classify the input plate type is applied. Tests to verify the developed algorithm with sample plates of a real ship data have been performed.
참고문헌 (19)
- Besl P.J., "Invariant Surface Characteristics for 3D Object Recognition in Range Images", Computer Vision, Graphics, and Image Processing, 33, pp.33~80 (1986)
- Besl P.J., "Segmentation Through Variable-order Surface Fitting", IEEE Transaction Pattern Analysis and Machine Intelligence, 10(Issue 2), pp.167~192 (1988)
- Blanchard B.S., "Systems Engineering and Analysis" (2006), Pearson Prentice Hall
- Surfaces for Computer- Aided Design of Space Forms, "Coons S.A.", MIT, ~, pp.Technical Report MAC-TR 44 (1967)
- Dasarathy B.V., "Nearest Neighbor (NN) Norms : NN Pattern Classification Techniques" (1991), IEEE Computer Society Press
- Ishiyama M., "Advanced Line-Heating Process for Hull-Steel Assembly", Journal of Ship Production, 16(2), pp.121~132 (2000)
- 장창두, "선상가열 판변형 해석을 위한 고유변형도 영역의 결정법", 대한조선학회 논문집, 39(1), pp.9~89 (2002), 대한조선학회
- 장창두, "고유변형도법을 이용한 삼각가열에 의한 판 변형의 시뮬레이션", 대한조선학회 논문집, 45(6), pp.703~709 (2008), 대한조선학회
- Kang J.G., "Numerical Analysis of Induction Heating for the Application of Line Heating", Journal of the Society of Naval Architects of Korea, 37(3), pp.110~121 (2000)
- Kim J., "A Study of 3D Design Data Extraction for Thermal Forming Information", Journal of Ship and Ocean Technology, 12(3), pp.1~13 (2008)
- Kim S.Y., "Automation of Hull Plates Classification in Ship Design System using Neural Network Method", Mechanical Systems and Signal Processing, 20(2), pp.493~504 (2004)
- Lee C., "Feature Extraction Based on Decision Boundaries", IEEE Transaction on Pattern Analysis and Machine Intelligence, 15(4) (1993)
- 이장현, "유한요소해석과 다변수해석에 의한 선상가열 변형관계식", 대한조선학회 논문집, 39(2), pp.9~80 (2002), 대한조선학회
- 이주성, "강판의 곡가공 자동화를 위한 수치제어 시스템의 개발", 한국해양공학회지, 17(1), pp.72~79 (2003), 한국해양공학회
- Ryu, C.H., "Consistent Algorithm for Unfolded Flat Shape of Curved Ship's Hull Shells by Minimizing Strain Energy", 박사, pp.2002
- Shin J.G., "A Two-Dimensional Simulator for Plate Forming by Line Heating", Journal of the Society of Naval Architects of Korea, 29(1), pp.191~200 (1992)
- Shin J.G., "User-Friendly, Advanced Line Heating Automation for Accurate Plate Forming", Journal of Ship Production, 19(1), pp.8~15 (2003)
- Shin J.G., "A Comprehensive Line-Heating Algorithm for Automatic Formation of Curved Shell Plates", Journal of Ship Production, 29(2), pp.69~78 (2004)
- Yun D.K., "A Determination of Approximated Cylindrical Surfaces of Doubly Curved Surfaces for the Least Line Heating", Journal of the Society of Naval Architects of Korea, 36(3), pp.134~143 (1999)