http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
[동력전달계] 건설차량용 자동변속기 동력전달장치의 모델링 및 해석
박정렬(Jung Yul Park),허재웅(Jae Woong Hur),정규홍(Gyu Hong Jung),이교일(Kyo Il Lee),김관수(Kwan Soo Kim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
In general. the transient torque takes place when the gear shifts in the vehicle equipped with automatic transmission. The modeling of the powertrain is necessary for design the control algorithm to decrease the transient torque. In this study, the modeling of powertrain dynamics for the construction vehicle is established and the velocity analysis is accomplished. Automatic transmission for this system is ALT(Automotive Layshaft Transmission) type and has many shafts and rotating members. So the velocity analysis is achieved by classitying all element into three rotating groups and dynamic modeling is accomplished with three equivalent inertia models that are always in gear with each other. And the transient shift model is obtained by using this equivalent inertia model and the kinematic constraints for each gear shift. Also, the torque and pressure of each element which is required when the gear shifts can be obtained by static characteristic analysis and the minimum line pressure in hydraulic system can be set up through this result.
[동력전달계부문] 건설 차량용 자동변속기의 동력전달계 파라미터 민감도 분석 및 식별
최길우(Gil Woo Choi),박정렬(Jung Yul Park),허재웅(Jae Woong Hur),정규홍(Gyu Hong Jung),이교일(Kyo Il Lee),김관수(Kwan Soo Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the precedent work, we established a mathematical modeling of powertrain dynamics for the construction vehicle. The target system has automotive layshaft transmission that consists of many shafts and rotating members. To simulate shifting mechanism with good precision, it is very important to identify the parameters of internal powertrain elements. Furthermore, so is it in point of the performance prediction, simulation analysis and control application.<br/> In this paper, we discuss sensitivity analysis to examine the effect of parameter variations on vehicle turbine speed. And we accomplish the identification of the parameters of the powertrain elements by conducting several experiments. In some cases, we made an actual device for measuring inertia moment of the rotating members. For the estimation of the other parameters, we conducted shifting experiments and used least-square-method based on the turbine speed error between simulation and experiment. We then confirm good estimation accuracy by proving that the estimated parameters can also be applied to another experimental condition.
클러치 독립구동방식 자동변속기의 하향 변속 제어 알고리즘 개발
이수용(Soo-Yong Lee),박정렬(Jung-Yul Park),허재웅(Jae-Woong Huh),이교일(Kyo-Il Lee) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
Auto transmission is a device which accomplishes upshift and downshift alternatively for converting the output of engine properly according to driving conditions. Many researches about AT has been progressed, but many people focus their researches on upshift, not downshift. In this study, downshift control algorithm is developed. First, mathematical modeling of target system and simulation program is developted and verified by experimental results.<br/> In order to get the improvement of shift quality, control algorithm is designed to increase output torque linearly during inertia phase. To do so, engaged clutch pressure and disengaged clutch pressure is controlled using virtual sensor. Because the target system has clutch-to-clutch shift type transmission, independent control of each clutch is possible. So MISO control which controls engaged clutch and disengaged clutch at the same time is used to control one output element, output torque. The controller is designed using fuzzy logic control, and the performance of the controller is evaluated by simulation.