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송세일(Seil Song),차익래(Ikrae Cha),이권희(Kwonhee Lee),박경진(Gyungjin Park) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
As the solution of the automotive frontal crashworthiness is settled, side impact problem becomes challengeable. The door stiffness is the most important factor for the side impact. Generally, researches have been conducted on the assembled door. A side impact door beam is installed in a door to protect occupants from the side impact. The research is only concentrated on the side impact beam and a side impact beam is designed. The cross section is defined to have an elliptic shape. An optimization problem is defined to minimize the weight of the structure while various constraints are satisfied. Design variables are the radii and the thickness of the ellipsoid. The analysis of the side impact is carried out by the nonlinear finite element method. The optimization problem is solved by two methods. An orthogonal array is established around the existing design. Since the radii are included in the design variable set, a finite element model is made for each row of the array. Firstly, the formulated problem is solved by an algorithm which can handle constraints with orthogonal arrays. Secondly, the response surface method (RSM) is utilized. The functions are approximated by the information from the orthogonal array. Both methods can obtain better designs than the current one.<br/>
문기준(Keejune Mun),김태준(Taejun Kim),송세일(Seil Song),최성진(Sungjin Choi),김영석(Youngsuk Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
토션빔 현가계는 간단한 구조와 경량화의 장점 때문에 중소형승용차의 후륜현가계에 널리 사용되고 있다. 차량의 롤운동에 대한 토션빔 현가계의 거동특성은 세미트레일링암의 기구학적 운동특성과 유사하다는 가정하에서 롤센터높이, 롤스티어, 롤캠버의 이론식은 이미 알려져 있다. 본 논문에서는 튜뷸러빔형 토션빔 현 가계에 대해 상용 CAE S/W를 사용하지 않고 튜뷸러빔의 비틀림 강성과 롤강성을 계산할 수 있는 이론식을 제안했다. 먼저 길이방향으로의 폐단면적 정보가 주어질 때 튜뷸러빔을 미소길이로 구성된 선형비틀림스프링의 직렬연결로 가정하여 튜뷸러빔 비틀림 강성의 이론식을 제안하였다. 토션빔의 롤운동에서 포텐셜에너지를 튜뷸러빔 비틀림강성, 주요 hardpoint, 부싱강성의 함수로 정의하여 롤강성에 대한 수식을 제안했다. 이론식으로 계산된 튜뷸러빔 비틀림강성과 롤강성결과를 상용 S/W의 해석결과와 비교했을 때 각각 4%와 3.3%의 오차를 나타내었다.
박상준(Sangjoon Park),류완식(Wansik Ryu),송준걸(Jungeol Song),송세일(Seil Song),황성호(Sungho Hwang),김현수(Hyunsoo Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents shifting characteristics of automated manual transmission(AMT). In order to analyze the shifting characteristics, an AMT simulator is developed by considering the clutch and shift actuator characteristics. Using the simulator, shifting performances such as clutch torque, acceleration and velocity are investigated. It is found that torque interruption occurs during the shifting, which results in negative acceleration. Shift and clutch actuator should be controlled precisely for improved shift quality.
양갑진(Kabjin Yang),김도형(Dohyung Kim),허수영(Sooyoung Heo),이창훈(Changhoon Lee),이현우(Hyunwoo Lee),송세일(SeIl Song) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
The automatic transmission is discovering new potential every day. This report is for a part of the development of Automatic Manual Transmission(AMT) and the test facilities is produced for the reverse engineering of the hydraulic actuator system of the AMT in the first year, the mechanism of the auto-clutch system and the control system of manual transmission is understood. On the basis of the above, the research is accomplished that the concept of the part design and manufacturing to develop the hydraulic control system that can make the target manual transmission automatic.
양갑진(Kabjin Yang),김도형(Dohyung Kim),허수영(Sooyoung Heo),이창훈(Changhoon Lee),이현우(Hyunwoo Lee),송세일(SeIl Song) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The automatic transmission is discovering new potential every day. This report is for a part of the development of Automatic Manual Transmission(AMT) and the test facilities is produced for th e reverse engineering of the hydraulic actuator system of the AMT in the first year, the mechanism of the auto-clutch system and the control system of manual transmission is understood. On the basis of the above, the research is accomplished that the concept of the part design and manufacturing to develop the hydraulic control system that can make the target manual transmission automatic.