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서병석,박노국,전용한,Seo, Byung-Suk,Park, Ro-Gook,Jeon, Yong-Han 대한안전경영과학회 2020 대한안전경영과학회지 Vol.22 No.2
Industrial facilities need design to predict and reduce noise from design to prevent and reduce noise. The purpose of this study is to predict worker's environment and evaluate safety by analyzing noise inside underground blower room and air compressor room with fluid machinery in waste facility. This waste incineration facility was analyzed based on the ground floor, ground floor blower chamber, and air compressor chamber. The results of SPL(Sound Pressure Level) analysis at 1.5m away, which are frequently used to measure the SPL as a noise source, are as follows. SPL of basement level: 46.80[dB], SPL of ground layer: 48.57[dB]. As a result, it was expected that the noise level would be considerably lower than the 8 hours 50[dB] noise exposure per day.
센서 네트워크를 위한 계층적 라우팅 프로토콜의 성능 분석
서병석,윤상현,김종현,Seo, Byung-Suk,Yoon, Sang-Hyun,Kim, Jong-Hyun 한국시뮬레이션학회 2012 한국시뮬레이션학회 논문지 Vol.21 No.4
본 연구에서는 센서 네트워크용 병렬 시뮬레이터인 PASENS(Parallel SEnsor Network Simulator)를 이용하여 센서 네트워크에 이용되는 라우팅 알고리즘 중에서 계층적 라우팅 프로토콜의 대표적인 방식인 LEACH(Low-Energy Adaptive Clustering Hierarchy)와 그의 변형인 TL-LEACH(Two Level Low-Energy Adaptive Clustering Hierarchy), M-LEACH(Multihop Low-Energy Adaptive Clustering Hierarchy), 그리고 LEACH-C(LEACH-Centralized)의 전력 소모량과 데이터의 수신율을 비교하고 분석하였다. 시뮬레이션을 이용한 분석 결과에 따르면, M-LEACH 라우팅 프로토콜의 경우에는 여러 센서 노드들을 통하여 데이터가 전달되기 때문에 일정한 크기 이상의 넓은 공간에서 높은 수신율을 보였으며, LEACH-C 라우팅 프로토콜은 싱크 노드(서버)가 전체 센서 노드의 잔여 에너지와 위치를 고려하여 클러스터 헤드를 결정하기 때문에 좁은 공간에서 보다 오랜 수명을 필요로 하는 센서 네트워크를 구축하는데 가장 효율적이라는 것을 확인 할 수 있었다. In this study, we use a parallel simulator PASENS(Parallel SEnsor Network Simulator) to predict power consumption and data reception rate of the hierarchical routing protocols for sensor network - LEACH (Low-Energy Adaptive Clustering Hierarchy), TL-LEACH (Two Level Low-Energy Adaptive Clustering Hierarchy), M-LEACH (Multi hop Low-Energy Adaptive Clustering Hierarchy) and LEACH-C (LEACH-Centralized). According to simulation results, M-LEACH routing protocol shows the highest data reception rate for the wider area, since more sensor nodes are involved in the data transmission. And LEACH-C routing protocol, where the sink node considers the entire node's residual energy and location to determine the cluster head, results in the most efficient energy consumption and in the narrow area needed long life of sensor network.
서병석,전용한,Seo, Byung-Suk,Jeon, Yong-Han 대한안전경영과학회 2020 대한안전경영과학회지 Vol.22 No.2
Sludge incineration facilities are socially recognized as a hate facility. Therefore, a careful deodorization plan must be established. Therefore, the incineration facility must conduct research on odor ventilation. In this study, a odor diffusion simulation in an incineration facility was conducted and analyzed. In particular, research was carried out on carry-in rooms, pre-treatment rooms, and storage facilities for crops, which are expected to rapidly spread odor. As a result, ammonia 1.62, hydrogen sulfide 0.63, and acetaldehyde 0.73 were found in the transfer room. In addition, pretreatment rooms and stencil storage facilities were found to be lower than regulatory standards.
Dynamic Inversion 기법을 이용한 전자제어 조향 시스템 제어기 설계
서병석(Byungseok Seo),양인석(Inseok Yang),변성일(Seongil Byun),이동익(Dongik Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Electric Power Steering(EPS) system has been developed in the last decade. Control strategy of EPS system is the core technology, which offer a various driving feelings and improve response time and accuracy. Many of control strategy is researched such as sliding mode control, H infinite control so on. But this controller is not guaranteed safe-critical system’s requirements and very complex. For this reason, the paper aims at designing a robust controller with dynamic inversion method, strengthening the robustness on stability and providing fast and accuracy response. The simulation results verified the effect of proposed controller.
서병석(Byungseok Seo),이동익(Dongik Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
This paper presents the fault detection and isolation strategy for electric vehicle(EV). Unlike the conventional internal combustion engine vehicle, electric vehicle is consist of electric motor, inverter, battery-management system(BMS), etc. For this reason, electric vehicle has a new failure modes. Vehicle system is a safety-critical system. There are high demands on safety. In this paper, we analysis of electric vehicle failure mode using Fault Tree Analysis(FTA) method. The result of Motor/inverter and battery system fault tree analysis are shown in conclusion.
무선센서네트워크를 기반으로 한 분산 심전도 모니터링 시스템
서병석(Byung-Suk Seo),김태규(Tae-Kyu Kim),김종현(Jong-Hyun Kim) 한국정보과학회 강원지부 2007 한국정보과학회 강원지부 학술대회 논문집 Vol.1 No.1
최근 유비쿼터스 컴퓨팅 기술의 발달로 가장 두드러진 연구 성과를 보여주는 분야가 헬스케어이다. 언제, 어디서나 자신의 건강상태를 모니터링 할 수 있는 시스템은 인구의 고령화 사회에서 아주 중요한 일이라 할 수 있다. 이러한 시스템은 유비쿼터스 환경의 센서 네트워크를 기반으로 한 분산 시스템을 이용하면 매우 효율적으로 구성할 수 있다. 본 연구에서는 무선센서네트워크를 기반으로 한 저전력, 저비용의 특징을 가지는 분산 심전도 모니터링 시스템을 구성한다.