선박 외판 성형에서 목적 형상과 전개 평판의 최적 정합을 위한 ICP(Iterative Closest Point) 알고리즘 적용

다국어 초록 (Multilingual Abstract)

Generally, curved surfaces of ship hull are deformed by flame bending (line heating), multi-press forming, and die-less forming method. The forming methods generate the required in-plane/bending strain or displacement on the flat plate to make the curved surface. Multi-press forming imposes the forced displacements on the flat plate by controlling the position of each pressing points based upon the shape difference between the unfolded flat plate and the curved object shape. The flat plate has been obtained from the unfolding system that is independent of the ship CAD. Apparently, the curved surface and the unfolded-flat surface are expressed by different coordinate systems. Therefore, one of the issues is to find a registration of the unfolded surface and the curved shape for the purpose of minimum amount of forming works by comparing the two surfaces. This paper presents an efficient algorithm to get an optimized registration of two different surfaces in the multi-press forming of ship hull plate forming. The algorithm is based upon the ICP (Iterative Closest Point) algorithm. The algorithm consists of two iterative procedures including a transformation matrix and the closest points to minimize the distance between the unfolded surface and curved surfaces. Thereby the algorithm allows the minimized forming works in ship-hull forming.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 관련 연구
• 3. ICP 알고리즘 적용
• 4. 결론
• 참고문헌

참고문헌 (Reference)

1 류철호, "최소 변형률 에너지를 갖는 선체 외판의 곡면 전개 형상 알고리즘" 서울대학교 2002

2 유철호, "자동 메쉬 생성을 적용한 향상된 자유 곡면의 최적 근사 전개 알고리즘" 한국CAD/CAM학회 11 (11): 157-163, 2006

3 유철호, "변형 이론을 기반으로한 곡면의 최적 근사 전개" 한국CAD/CAM학회 7 (7): 190-201, 2002

4 Lee, J. H., "Springback Compensation based on Finite Element for Multi-point Forming in Shipbuilding" 26 : 981-984, 2007

5 Shin, J. G., "Nondimensionalized Relationship Between Heating Conditions and Residual Deformations in the Line Heating Process" 46 (46): 229-238, 2002

6 Huang, X., "Localization and Comparison of Two Free-form Surfaces" 28 (28): 1017-1022, 1996

7 Rusinkiewicz, S., "Efficient Variants of the ICP Algorithm" 145-152, 2001

8 Horn, B. K. P., "Closed-form Solution of Absolute Orientation Using Unit Quarternions" 4 (4): 629-642, 1987

9 Huang, X., "CAD-model based Inspection of Sculptured Surfaces with Datums" 36 (36): 1351-1367, 1998

10 Besl, P. J., "A Method for Registration of 3-D Shapes" 14 (14): 239-256, 1992