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Zero Emission Zone 대응을 위한 도심형 Extended Range 전기 휠 굴착기 개발
박진현(Jinhyun Park),서현재(Hyunjae Seo),김영범(Youngbum Kim),송용현(Yonghyeon Song),한용희(Yonghee Han),신명호(Myungho Shin),박준홍(Junhong Park),김동현(Donghyun Kim),김재혁(Jaehyuk Kim),박기협(kihyeop Park),이경래(Kyungrae Lee) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
지연된 채널 정보를 가진 하이브리드 ARQ 기반 기회적 중계 기법의 불능 확률 및 처리율 분석
박진현(Jinhyun Park),이재홍(Jae Hong Lee) 한국방송·미디어공학회 2012 방송공학회논문지 Vol.17 No.2
Hybrid-ARQ and opportunistic relaying are the widely used schemes for obtaining diversity gain in wireless communications. In opportunistic relaying, channel state information(CSI) between relays and destination is required to select the best relay. But if the destination moves very fast, the CSI becomes outdated. In this paper, performance of hybrid-ARQ based opportunistic relaying with outdated CSI is analyzed in outage probability and throughput perspective. The analysis is verified by computer simulations.
32-bit 임베디드 시스템을 이용한 ECU Fail-Safe 시스템 구현
박진현(Jinhyun Park),김현오(Hyunoh Kim),전재욱(Jaewook Jeon),황성호(Sung-ho Hwang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
As strengthen the environmental protection law, development of alternative fuel vehicle is essential, for example, hybrid vehicle, electric vehicle, fuel cell vehicle. For development of these vehicles, electronic control is essential to improve performance of vehicle. In this paper, ECU Hardware-in-the Loop Simulation system is developed, which is based on 32-bit embedded control unit. If the brake system is out of oder, fatal accidents could break out. Therefore, The Fail-Safe Systems for BCU and TCU are accomplished, which have self diagnosis system.
회복탄력성을 고려한 기상 시나리오별 가뭄 용수 공급방안: 나주호를 중심으로
박진현 ( Park Jinhyun ),고재한 ( Go Jeahan ),조영준 ( Jo Youngjun ),정경훈 ( Jung Kyunghun ),성무홍 ( Sung Muhong ),정형모 ( Jung Hyoungmo ),박현규 ( Park Hyunkyu ),유승환 ( Yoo Seunghwan ),윤광식 ( Yoon Kwangsik ) 한국농공학회 2018 한국농공학회논문집 Vol.60 No.5
Resilience has been widely used in various fields including design and operation of infrastructures. The resilient infrastructures not only reduce the damage scale of various disasters but also reduce the time and cost required for restoration. However, resilience rarely applied to promote efficient management of agricultural infrastructures. Recently, drought is an aggravating disaster by climate change and need countermeasures. Therefore, we tried to demonstrate evaluating measures in case of drought under consideration of resilience. This study applied the robustness-cost index (RCI) to evaluate alternative solution of the supply problem of a large agricultural reservoir under drought conditions. Four structural alternatives were selected to estimate the robustness index (RI) and the cost index (CI) to obtain the RCI values. Structural alternatives are classified into temporary measures and permanent measures. Temporary measures include the development of a tube wells and the installation of the portable pump, while the permanent measures include the installation of a pumping stations and the pumping water to the reservoir (Yeongsan River-Naju reservoir). RCI values were higher in permanent measures than those of temporary measures. Initial storage of the reservoir also affected RCI values of the drought measures. Permanent measures installation and management of early stage of the reservoir storage shortage was identified as the most resilient system.
전동 통합 샤시를 이용한 2륜 독립구동 차량의 선회성능 향상에 관한 연구
박진현(Jinhyun Park),최정훈(Jeonghun Choi),송현우(Hyeonwoo Song),황성호(Sung-Ho Hwang) 대한기계학회 2013 大韓機械學會論文集A Vol.37 No.7
독립 구동형 전동 통합 샤시 시스템은 시스템 내구 성능 관련 신뢰성 확보, 구동 전동기 고장 시차량 안정성 확보, 차륜 중량 증가에 따른 Ride & Handling 성능 저하 등의 문제로 실제 차량에 적용이 지연되고 있다. 본 논문에서는 이러한 문제들 중 Ride & Handling 문제를 해결하기 위해 차량의 주행성능 평가가 가능한 시뮬레이터를 개발하였다. MATLAB/Simulink를 이용하여 독립구동형 전동 샤시 시스템이 적용된 소형 전기 자동차를 모델링 하였으며, 27자유도의 차량 거동 해석이 가능한 CarSim을 이용하여 차량동역학을 모델링 하였다. 개발된 시뮬레이터를 활용하여 차량의 주행 안정성을 향상을 위한 알고리즘을 개발/검증함으로써 차량의 Ride & Handling 성능 저하 문제를 해결하고자 하였다. An independently driven electric corner module cannot be applied to an actual vehicle without some difficulty, because of vehicle safety problems in the case of malfunctions and degraded ride and handling performance owing to the increase in the unsprung mass. In this study, a simulator is developed to evaluate the vehicle driving performance in order to solve ride and handling problems. Component modeling of a small-sized electric vehicle with an independently driven electric corner module is performed using MATLAB/Simulink. The vehicle is modeled by using CarSim, which can be used to analyze the vehicle maneuvers with 27 DOFs. The control algorithm for the improvement of vehicle driving safety and ride and handling performance is validated by using the developed simulator.
지연된 채널 정보를 가진 하이브리드 ARQ 기반 기회적 중계 기법의 불능 확률 및 처리율 분석
박진현(Jinhyun Park),이재홍(Jae Hong Lee) 한국방송·미디어공학회 2011 한국방송공학회 학술발표대회 논문집 Vol.2011 No.11
기회적 중계 기술(opportunistic relaying)은 중계기를 사용하여 다이버시티 이득을 얻을 수 있는 효율적인 기술로 평가되고 있다. 기회적 중계 기술에서는 가장 좋은 중계기를 선택하여 송신기의 전송 신호를 재전송하게 되는데, 중계기 선택은 채널 정보(channel state information)를 이용하여 이루어진다. 본 논문에서는 하이브리드 ARQ 기반 기회적 중계 기술에서 중계기를 선택할 때 사용하는 채널 정보(channel state information)가 지연된 정보일 때, 시스템의 불능 확률(outage probability) 및 처리량(throughput)을 분석한다. 컴퓨터 시뮬레이션을 통해 분석이 정확한지 검증한다.
독립구동형 전동 샤시 시스템 주행안전성 평가 시뮬레이터 개발
박진현(Jinhyun Park),최정훈(Jeonghun Choi),왕빈,송현우,황성호(Sung-Ho Hwang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this paper, in an effort to secure based technology to solve performance degradation problem of vehicles ride & Handling in independence-driven electric chassis system. To solve our problem, MATLAB/Simulink and Carsim is used to modeling vehicles powertrain and complete Ride & Handling Performance evaluation environment each. Ride & Handling performance evaluation environment is completed by co-simulation of two simulation environment. Simple control principle of electric chassis system is proposed to develop of vehicle driving control algorithm using developed environment. Also, in an effort to secure based technology to solve performance degradation problem of vehicles ride & Handling by proposing demand yaw rate calculation algorithm of vehicle when turning that can be used in the development of control logic development in the future.