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이병현(Lee, Byung-Hyun),이준기(Lee, Jun-Gi),이경희(Lee, Kyung-Hee) 한국건축친환경설비학회 2014 한국건축친환경설비학회 논문집 Vol.8 No.3
The purpose of this study was to analyze the evacuation behavior of a studio-apartment in case of fire disaster. Recently, residential apartments for city as well as studio-apartment buildings as a new residential building are a trend that has been made miniaturization and high-rise building. Such a building characteristics have more potential risk factor of fire. double-loaded corridor type have many rooms. In case of fire in the living room that opens to the corridor outward opening door and in corridor evacuation stairs to open the door to evacuation. The doors open on both sides of the corridor due to the narrow passage into the barriers to evacuation problems occur. So, it is necessary to study for fire safety design of studio-apartment. The study carried out studio-apartment of a double-loaded corridor type planning by fire?evacuation simulation, evaluation of a double-loaded corridor type in evacuation and fire has been printed out. Change to the effective width of evacuation door and opening direct on of the door after changing could reduce the evacuation time. This result have shown that there was a need for review to the width and the direction of the door in case of evacuation plans.
EMTP-MODELS를 이용한 Multi-Agent System 기반의 동기탈조 검출 알고리즘 구현
李秉炫(Byung-Hyun Lee),呂相敏(Sang-Min Yeo),李瑜珍(You-Jin Lee),成魯珪(No-Kyu Sung),金喆煥(Chul-Hwan Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.4
The protection against transient instability and consequent out-of-step condition is a major concern for the utility industry. Unstable system may cause serious damage to system elements such as generators and transmission lines. Therefore, out-of-step detection is essential to operate a system safely. Also, a multi-agent system is one that consists of a number of agents, which interact with one another. Multi-agent systems(MAS) can offer the flexibility and the adaptability to the previous algorithm. In this paper, the detection algorithm of out-of-step is designed by multi-agent system and implemented by EMTP-MODELS. To verify performance of the proposed algorithm based on multi-agent system, simulations by EMTP have been carried out.
EMTP-MODELS를 이용한 Multi-Agent System 기반의 자동 재폐로 계전 알고리즘 구현
李秉炫(Byung-Hyun Lee),成魯珪(No-Kyu Sung),呂相敏(Sang-Min Yeo),李瑜珍(You-Jin Lee),金喆煥(Chul-Hwan Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.1
This paper presents auto-reclosing algorithms with reference to power system stability based on MAS(Multi-Agent System). And this paper shows auto-reclosing algorithms considering power system stability. It includes the variable dead time, optimal reclosing, sequential reclosing, emergency extended equal-area criterion (EEEAC) algorithm, and modified EEEAC algorithm. This paper divides Auto-reclosing algorithms into respectively agents according to their tasks. A separated agent is merely a software entity that is situated in some environment and is able to autonomously react to changes in the environment. And all the simulations in this parer were tested by EMTP MODELS.
갈릴레오 GIOVE-A E1 신호 분석 및 RF 프론트엔드 대역폭 영향 분석
이병현(Byung-Hyun Lee),임성혁(Sung-Hyuck Im),지규인(Gyu-In Jee),고선준(Sun-Jun Ko) 한국항공우주학회 2008 韓國航空宇宙學會誌 Vol.36 No.8
갈릴레오는 유럽에서 개발하고 있는 민간 주도의 새로운 위성항법시스템이다. 갈릴레오 시스템의 성능을 테스트하기 위한 테스트 위성인 GIOVE-A 위성이 현재 지구 상 궤도에서 항법신호를 송출하고 있다. 갈릴레오 시스템의 성능을 평가하고 향후 갈릴레오 수신기를 개발하기 위해서는 GIOVE-A 위성 신호를 분석할 필요가 있다. 본 논문에서는 GIOVE-A 위성신호를 수신 한 후 이를 GIOVE-A 신호 규격문서에 정의된 정보를 이용하여 신호 처리 하였다. 신호 획득, 추적 및 항법 메시지 디코딩의 과정을 수행하여 현재 GIOVE-A 위성의 항법정보 제공 상황을 파악하였다. BOC 신호 사용에 따른 항법신호 대역폭의 증가가 갈릴레오 신호가 GPS와 다른 점 중의 하나이며 RF 프론트엔드의 대역폭에 따른 항법 신호 수신 성능을 평가하여 현재 사용되고 있는 GPS L1 RF 프론트엔드를 사용할 수 있는지를 검토하였다. Galileo is a new civil Global Navigation Satellite System(GNSS) developed by Europe. GIOVE-A, a satellite to test Galileo system performance, transmits navigation signal on orbit. Evaluation of Galileo system and development of Galileo receiver needs to analyze GIOVE-A signals. In this paper, we received GIOVE-A signals and processed it using GIOVE-A Interface Control Document(ICD). Signal acquisition, tracking and navigation message decoding made grasping current signal status possible. Bandwidth increase by BOC modulation is one of the difference from GPS. Therefore, we investigated feasibility of conventional GPS L1 RF front-end to receive GIOVE-A El signal by evaluation of receiving performance of navigation signal on each bandpass filter of RF front-end.
곡선모델 차선검출 기반의 GPS 횡방향 오차보정 성능향상 기법
이병현(Byung-Hyun Lee),임성혁(Sung-Hyuck Im),허문범(Moon-Beom Heo),지규인(Gyu-In Jee) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.2
GPS position errors were corrected for guidance of autonomous vehicles. From the vision, we can obtain the lateral distance from the center of lane and the angle difference between the left and right detected line. By using a controller which makes these two measurements zero, a lane following system can be easily implemented. However, the problem is that if there’s no lane, such as crossroad, the guidance system of autonomous vehicle does not work. In addition, Line detection has problems working on curved areas. In this case, the lateral distance measurement has an error because of a modeling mismatch. For this reason, we propose GPS error correction filter based on curve-modeled lane detection and evaluated the performance applying it to an autonomous vehicle at the test site.
지능형 교통시스템에 적합한 위성항법 기반의 정밀측위 구조 설계
이병현(Byung-Hyun Lee),임성혁(Sung-Hyuck Im),허문범(Moon-Beom Heo),지규인(Gyu-In Jee) 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.11
In this paper, a structure of precise positioning based on satellite navigation system is proposed. The proposed system is consisted with three parts, range domain filter, navigation filter and position domain filter. The range domain filter generates carrier phase-smoothed-Doppler and Doppler-smoothed-code measurements. And the navigation filter calculates position and velocity using double-differenced code/carrier phase/Doppler measurements. Finally, position domain filter smooth position error, and it means enhancement of positioning performance. The proposed positioning method is evaluated by trajectory analysis using precise map date. As a result, the position error occurred by multipath or cycle slip was reduced and the calculated trajectory was in true lane.