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회생제동 시스템 신뢰성 평가를 위한 연료전지 차량 시뮬레이션 환경 구축
양동호(Dongho Yang),조배균(Baekyun Cho),전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),황성호(Sung-Ho Hwang) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Recently, the hydrogen as a fuel to produce electricity in fuel cells actively study progresses, eco-friendly high-efficiency fuel cell electric vehicle for vehicle research has also been active in several areas. In particular, many studies to improve the efficiency of the vehicle is underway, in which regenerative braking technology of electric vehicles, energy storage devices such as fuel cell vehicles have the fuel efficiency of vehicles as key areas for improvement have been studied. According to the development of regenerative braking technology, Brake-By-Wire technology is also being developed, because regenerative braking deficiencies should be rewarded with a physical break to include hydraulic brake systems are limited. Unlike hydronic brake, electronic brake systems is controlled by electronic signals, such as Fail-Safe to verify the stability and reliability are required to develop assessment techniques. In this paper, we made the fuel cell vehicle simulation model using Co-simulation MATLAB/Simulink and CarSim, and build the SIL(Software-In-the-Loop) Simulation and the regenerative braking system reliability evaluation environment based characteristic map of sensor in vehicle in order to evaluate the reliability of regenerative braking control logic.
하이브리드 자동차의 모드 변환 엔진클러치 과도상태 분석과 토크 제어에 관한 연구
황현수(Hyunsoo Hwang),김상우(Sangwoo Kim),양동호(Dongho Yang),홍정호(Jungho Hong),김현수(Hyunsoo Kim),황성호(Sungho Hwang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
2-shaft parallel hybrid electric vehicle(HEV) drive train changes driving mode electric vehicle(EV) mode to HEV mode with a engine clutch. There is a torque variation that causes a driver discomfort. In this paper, Cosimulation environment that is HEV drive train modeled with AMESim in detail to describe a torque variation, and controller developed with MATLAB/Simulink is developed. To reduce discomfortable torque variation, Engine torque strategy before engine clutch engaged, and motor torque strategy after driving mode is changed, and the strategy using engine and motor torque strategy are proposed.
전자 브레이크를 적용한 연료전지자동차 회생제동 시스템의 신뢰성 평가기술 개발 PART-(2)
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),양동호(Dongho Yang),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The demand of the green car like hybrid electric vehicle, fuel cell electric vehicle(FCEV) and pure electric vehicle have risen dramatically. The key technology is the regenerative braking in the energy saving technology. And electronic brake has been developed along with the advance of the electronic control technology. The reliability about the braking system is very important because the braking system is concerned with safety of vehicle. But the regulation is not sufficient enough. In this study, to develop the reliability assessment technology FCEV model with regenerative braking system and electronic braking system(EWB, EMB) was developed. The reliability assessment scenarios about regenerative braking system and electronic braking system is developed using ABS brake regulations and FMEA results. This scenarios ware applied to the performance simulation of the FCEV with the regenerative braking and the electronic braking system. And the fail-safe control strategy of a EMB was suggested and verified.
전자 브레이크를 적용한 연료전지자동차 회생제동 시스템의 신뢰성 평가기술 개발 PART-(1)
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),양동호(Dongho Yang),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The demand of the green car such as hybrid electric vehicle, fuel cell electric vehicle and pure electric eehicle has been rising dramatically. The key part is the regenerative braking system in the energy saving technology of gren car. And electronic braking system has been developed along with the advance of the electronic control technology. The reliability about the electronic braking system is very important because it is concerned with the safety of vehicle. But the regulation of the reliability assessment test for the regenerative braking and electronic braking system is not sufficient enough. In this paper, FCEV with regenerative braking system and electronic braking system(EWB, EMB) has been modeled to develop the reliability assessment technology. With a lot of ABS brake regulations and FMEA results about the regenerative braking system and electronic braking system, the reliability assessment scenarios have been developed. This scenarios have been applied to the performance simulation and it is shown effective to evaluate the reliability of green car regenerative braking with electronic braking system.
온라인 원격수업의 상호작용 향상을 위한 원격수업 UI 디자인 개선방안
변정현(Jeonghyun Byeon),김승현(Seunghyun Kim),김다연(Dayeon Kim),윤동화(Donghwa Yoon),양동호(Dongho Yang) 한국정보과학회 2021 한국정보과학회 학술발표논문집 Vol.2021 No.6
코로나19로 인해 실시간으로 진행되는 원격화상 수업은 교수자와 학습자 간의 동시적인 상호작용과 질의응답이 가능하다는 점 때문에 비대면 교육에서 많이 사용되어 지고 있다. 그러나 원격환경은 학습자가 동료 학습자와의 유기적인 관계 및 상호작용의 부족으로 인해 강의의 효율이 떨어지고 있다. 본 연구에서는 실시간 원격 화상강의에서 교수자와 학습자의 상호작용 향상을 위한 원격수업 UI(User Interface) 디자인 개선방안을 제안하고자 한다.