Development of a Control System for Automated Line Heating Process by an Object-Oriented Approach

  • Shin, Jong-Gye (Research Institute of Marine Systems Engineering, Seoul National University) ;
  • Ryu, Cheol-Ho (Research Institute of Engineering Science, Seoul National University) ;
  • Choe, Sung-Won (Factory Automation R&D Team, Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
  • 발행 : 2002.12.01

초록

A control system for an automated line heating process is developed by use of object-oriented methodology. The main function of the control system is to provide real-time heating information to technicians or automated machines. The information includes heating location, torch speed, heating order, and others. The system development is achieved by following the five steps in the object-oriented procedure. First, requirements are specified and corresponding objects are determined. Then, the analysis, design, and implementation of the proposed system are sequentially carried out. The system consists of six subsystems, or modules. These are (1) the inference module with an artificial neural network algorithm, (2) the analysis module with the Finite Element Method and kinematics analysis, (3) the data access module to store and retrieve the forming information, (4) the communication module, (5) the display module, and (6) the measurement module. The system is useful, irrespective of the heating sources, i.e. flame/gas, laser, or high frequency induction heating. A newly developed automated line heating machine is connected to the proposed system. Experiments and discussions follow.

키워드

참고문헌

  1. ASTILLEROS ESPANOLES (AESA) 1992 Line heating Operating Manual. NSRP Report, 395
  2. JANG, C.D. AND MOON, S.C. 1998 An Algorithm to Determine Heating Lines for Plate Forming by Line Heating Method. J. of Ship Production, 14,4, pp. 238-245
  3. LEE, J.H. 1999 Relations between Input Parameters and Residual Deformations in Line Heating Process Using Finite Element Method and Multi-Variate Analysis. Ph.D. Thesis, Dept. of Naval architecture and Ocean engineering, Seoul National University, Seoul, Korea
  4. LETCHER, J.S. 1993 Lofting and Fabrication of Compound Curved Plates. J. of Ship Research, 37,2,pp.166-175
  5. MOSHAIOV, A. AND SHIN, J.G. 1991 Modified Strip Model for Analyzing the Line Heating Method-Part 2:Thermo Elastic Plastic Plates. J. of Ship Research, 35, 3, pp. 266-275
  6. PARK, S. K., KIM, W.D. AND SHIN, J.G. 1997 A Mechanical Information Model of Line Heating Process Using Artificial Neural Network. Transactions of the Society of Naval Architects of Korea, 34, 1, pp. 122-129
  7. RYu, C.H. 1998 A Determination of Heating Paths for Line Heating process Considering Kinematic Analysis of Plates. M.S. Thesis, Dept. of Naval architecture and Ocean engineering, Seoul National University, Seoul, Korea
  8. SCHENCK D. AND WILSON P. 1994 Information Modeling the EXPRESS Way. Oxford University Press
  9. SHIN, J.G. AND KIM, W.D. 1997 Kinematics Analysis for Process Planning of Compounding Ship's Hull Plates. J. of Ship Production, 13, 1, pp. 28-35
  10. SHIN, J.G., LEE, J.H. AND KIM, W.D. 1995 A Numerical Simulation of a Line Heating Process for Plate Forming. Proceedings of Practical Design of Ships and Mobile Units, pp. 2.1447-2.1458
  11. UEDA, Y., MURAKAWA, H., MOHAMED, R.A., NEKI, I., KAMACHIKA, R., ISHIYAMA, M. AND OGAWA, J. 1994 Development of Computer Aided Process for Plate Bending by Line Heating (Report 1) - Relation Between the Final Form of the Plate and the Inherent Strain. J. of Ship Production, 10, 1, pp. 59-67
  12. Yoo, B.H., KIM, W.D. AND SHIN, J.G. 1995 A Study on the Inherent Strain and Geometry Information for Hull Plate Forming process. Proceedings of the Annual Autumn Meeting of the Society of Ship Naval Architects of Korea, pp. 112-117