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김원규(WonKyu Kim),김연수(YounSu Kim),이완철(WanChul Lee),홍성우(SungWoo Hong),김귀한(GuiHan Kim) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4
Recently, the interest in technologies for a highly efficient powertrain, i.e. a variable displacement engine or a light weight car body, to improve the fuel efficiency of automobile saving the environment has been increased. However this trend deteriorates NVH performance of a vehicle and the use of a conventional engine mounting system becomes unsatisfactory. In order to solve this dilemma, an active engine mounting system that could isolate or cancel out vibrations occurred at the powertrain was suggested. In this paper, In order to optimize the electromagnetic active engine mount performance, the actuator of the engine mount through FEM analysis and optimal design, noise and elastomer testing of the prototype through the optimal design of actuators for the electromagnetic active engine mount on the impact of the performance improvement is verified.
홍재성(Hong Jaisung),김연수(Kim Younsu),이호용(Lee Hoyong),김원경(Kim Wonkyong),양우봉(Yang woobong),신진호(Shin Jinho) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
There are many EMU lines in korea. But only one type has been applied to passenger side door. This type is so called "Pocket sliding type". This type has some week points. To begin with, it is not good for decreasing the noisy form the outside of carbody. And the second time, if some obstacles are put between sliding door, only driver can operate re-open door switch manually in driver"s cab. This type is so dangerous for passengers. So many people want to the new door type that have no defect. KRRI joined forces with ANT corporation for pneumatic plug door system. This type will be good for decreasing the noisy, passenger"s safe. The project was started at the last year on November and will be finished on June, this year In this paper, we will deal with the role of cylinder, planetary gear, door control unit, dynamic mechanism, and the report of FEM, type test. This paper will contribute to the electric motor control plug door system.
이호영(Hoyoung Lee),이숭희(Soonghee Lee),김연수(Younsu Kim),조현성(Hyunsung Cho) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.1C
본 논문은 10GbE로의 망 전개에 따라 구현될 10Gb 스위치에 필요한 계층2 부가서비스들 중에서 여러 개의 물리적인 링크를 하나의 논리적인 링크로 집합하여 대역폭의 증가를 가져오는 링크 집합(Link Aggregation) 기술에 필요한 프레임 분배방식에 대한 것이다. 링크 집합 기술은 분배 알고리즘의 설계에 따라 스위치에서 성능의 차이를 가져오므로 링크 집합의 장점을 살리려면 좋은 성능을 가지는 분배 알고리즘이 필요하다. 우선 링크 집합의 간단한 구현 방법을 살펴보고 기존에 제시된 스위치와 스위치 사이에서의 프레임 분배방식인 정적/동적 프레임 분배 방식과 우리가 새로이 제안한 패딩을 이용한 분배방식을 비교한 후, 정적/동적 프레임 분배 방식과 패딩을 이용한 분배방식을 컴퓨터 시뮬레이션을 통해 성능을 비교하였다.