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이광병,이종길,김동훈,Lee, Kwang-Byeng,Lee, Jonggil,Kim, Donghoon 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.1
FOD(Foreign Object Debris) has the potential threat to damage aircraft during critical phases of take-off and landing roll with some objects including metal on the runway. FOD can be found anywhere on an airport's air operation areas such as runway, taxiway and apron. It can lead to catastrophic loss of life and airframe, and increased maintenance and operating costs. In this paper, we defined FOD and surveyed its riskiness and necessity of automatic FOD detection system. We compared the requirements of the environment in Korea to the FAA advisory circular. Also we analyzed operation methods of FOD detection systems already installed at some airports. Based on the surveys mentioned above, we propose hybrid type of FOD detection system considering the environment in Korea which uses millimeter wave radar, optical camera and thermal imaging camera to detect FOD efficiently. In management approach, fixed type of the system should be installed for real-time monitoring, and mobile type of the system can be used additionally.
이광병,이승열,금영탁(K. B. Lee),S. Y. Lee,Y. T. Keum 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
A 2-D forming analysis program for plane strain geometry of aluminum alloy sheet metals for autobody application was developed. For modeling the anomalous behavior of aluminum alloy, Barlat's strain rate potential and Hill's 1990 non-quadratic yield theory arranged under the plane strain assumption were employed. 2-D rigid-viscoplastic FEM formulation based on the bending-augmented membrane theory was derived, solving simultaneously force equilibrium as well as non-penetration condition. To verify the validity and availability of the developed program, the plane strain stretch/draw forming process and the drawing process of a rear seat back upper bracket were simulated. Key words: 2-D Forming Analysis. Plane Strain, Alurninum Alloy Sheet Metals<br/>