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자동차 시트에 적용 가능한 다이나믹 댐퍼 특성에 관한 고찰
박형민(Hyeongmin Park),손현일(Hyunil Son),강희수(Heesu Kang),이동희(Donghee Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
We studied the dynamic characteristics of vibartion absorber to reduce vibration transmitted to vehicle seats. The characteristics of various vibration absorber types were analysed experimentally in order to reduce vibration transmitted from the engine and the road surface. The causes and objectives were clarified according to the vibration absorber specifications, each characteristic was derived experimentally. We verified the vibration effect factors of the vehicle seat following the vibration absorber system through the vibration test. Through this study, I propose a method of selecting the vibration absorber types that are applied to reduce vibration transmitted to the vehicle seat.
박형민(Hyeongmin Park),최태진(Taejin Choi),강희수(Heesu Kang) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
In the case of vehicle seats, the final delivery path to the occupants of the vehicle is closely related to the ride comfort of the vehicle, e.g. suspension of the road surface or engine vibration. If the vehicle"s engine rpm is low, the excitation frequency of the vehicle and it will be located very close to the natural frequency of the seat. Accurate vibration characteristics of the seat structure shall be identified through the resonance avoidance design so that vibration is not transmitted to the vehicle occupants. A vibration characteristic of the seat structure is derived through the experimental method and the problem is effectively resolved in the vehicle seat vibration problem.
15V, 1㎾ 연료전지 스택을 위한 부하추종형 전력변환장치
박찬수(Chansoo Park),오형민(Hyeongmin Oh),최세완(Sewan Choi),박가우(Gawoo Park) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
본 논문에서는 15V, 1㎾ 저전압 연료전지를 위한 고효율 전력변환장치를 제안한다. DC-DC 컨버터로는 15V에서 380V 로의 고승압에 적합한 입력병렬·출력직렬 부스트 하프브리지를 제안하였는데 이는 전부하영역에서 ZVS 턴온으로 96%의 최고 효율을 달성하였다. 또한 DC-AC 인버터부는 상용전원으로의 변환 및 DC 링크 전압 제어를 수행한다. 1㎾급 시작품을 제작하여 그 성능을 검증하였다.