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이재경 ( Jaikyung Lee ),차무현 ( Moohyun Cha ),최병일 ( Byungil Choi ),김태성 ( Taesung Kim ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.2
고층빌딩, 지하역사와 같은 대형 복합건물은 건물 자체의 복합도 증가와 더불어 이에 따른 위험요소(hazard)의 증가를 가져오고 위험상황에 대처해야 할 소방관들의 대응기술 및 훈련도 고도화되어야 한다. 실제 화재현장, 특히 대형 복합건물에 대한 훈련은 비용, 시간뿐만 아니라 소방관 안전 확보라는 차원에서 불가능하며 반복적인 훈련이나 그 평가가 어렵다는 점에서 가상환경을 이용한 훈련 시스템이 필요하다. 본 논문에서는 복합건물에 대한 소방관 팀 훈련 시스템 구현을 위한 가상환경의 설계 및 구현을 소개하고자 한다. 가상환경은 소방관의 훈련 및 평가, 팀 단위 훈련을 제공하고 현실감 있는 훈련을 위하여 가상현실, 증강현실, 물리체험 모듈을 이용한 사용자 인터페이스를 제공한다. 가상환경 구축을 위하여 대상 건축물에 대한 3 차원 모델을 구축하고 도출된 발생 가능한 화재 시나리오에 대한 수치적 모델링을 수행하고 그 결과를 가상환경 및 훈련 시나리오에 반영하였다.
A Virtual Reality based Fire Training Simulator using Fire Dynamics Data
Moohyun Cha,Jaikyung Lee,Byungil Choi,Seonghwan Park,Hanmin Lee,Soonhung Han (사)한국CDE학회 2010 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
A computer-based fire training simulator using virtual reality technology helps the effectiveness of emergency response training for the firefighter or public users. Trainers navigate and experience the simulated fire environments and perform safe and iterative practice using the simulator. To fulfill their purpose, it must recreate fire phenomena with a high degree of accuracy and express them using realistic graphics. Usually, fire engineers develop and utilize CFD (Computational Fluid Dynamics) solvers to simulate fire and fluid behavior with a guaranteed accuracy range. This could provide the precise physical behavior of fluid to the training simulator system. We developed a virtual reality based fire training simulator using these fire dynamics simulation data in order to provide realistic and accurate graphics of fire phenomena. As a result, we could visualize 3D physical quantities related to fire, such as smoke flow, temperature, carbon monoxide, etc., which are calculated from the virtual fire scenario in a road tunnel. Through this system, a trainee was able to navigate and experience physical quantities of fires and a training supervisor could evaluate the training process in an immersive virtual environment.
차무현(Moohyun Cha),이재경(Jaikyung Lee),박성환(Seongwhan Park),최병일(Byungil Choi) (사)한국CDE학회 2009 한국CDE학회 논문집 Vol.14 No.4
An experience based training system concerning various fire situations which may result many casualties has been required to make rapid decision and improve the responsiveness. Recently, the necessity of virtual reality (VR) based t raining system which can replace a dangerous full-scale fire training and be easily adopted to the training or evaluation process is increasing. This study constructed the virtual environment according to pre-defined scenarios, utilized the FDS(Fire Dynamics Simulator), three dimensional computational fire analysis program, to derive numerically simulated data on the propagation of fire. Finally, by visualizing the realistic fire and smoke behavior through virtual reality technique and implementing real-time interaction, we developed a VR-based fire training simulator. Also, in order to ensure the sense for the real of a virtual world and real-time performance at the same time, we proposed appropriate data processing and space search algorithms, demonstrated the value of proposed method through experiments.
신동우(Dongwoo Shin),한형석(Hyungsuk Han),김동성(Dongsung Kim),이재경(Jaikyung Lee),김현수(Hyunsoo Kim),박태원(Taewon Park),임원식(Wonsik Lim) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
The Internet-based performance analysis system, called P-DYN, for automotive powetrains is developed. All the interfaces of the system are accessible via Web browsers, such as Netscape or Explorer. P-DYN/Processor, P-DYN/Plot as a preprocessor, postprocessor of P-DYN is developed in JAVA, DB. The P-DYN/Solver for predicting the powertrain performance is ran on the server. Anyone who wants to analyze powertrain performance or share the results data can access the analysis system on the Internet regardless of their OS, platform, or location.
객체지향모델링을 이용한 동력전달계 성능해석 프로그램 설계
한형석(Hyungsuk Han),김동성(Dongsung Kim),신동우(Dongwoo Sin),이재경(Jaikyung Lee),김현수(Hyunsoo Kim),박태원(Tarwon Park),임원식(Wonsik Lim) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
In this paper, the application of object-oriented modeling to develop a powertrain performance analysis program, called P-DYN, is introduced. Powertrain components, such as the engine, transmission, gear, inertia are modeled as objects which have data and method by using object-oriented modeling methodology. P-DYN, a performance analysis program, based on the object concept is made in C++. Two powertrain examples are analyzed through the P-DYN. It is expected that the analysis program or individual module constructed in this paper would be useful for automotive engineers in predicting the performance of powertrains and developing an analysis program.