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동력 분기 하이브리드 전기 자동차의 운행 모드 시뮬레이션
안국현(Ahn, Kuk-Hyun),조성태(Cho, Sung-Tae),임원식(Lim, Won-Sik),박영일(Park, Yeong-Il),이장무(Lee, Jang-Moo) 한국신재생에너지학회 2006 신재생에너지 Vol.2 No.2
The power split hybrid powertrain is considered to be one of the most prospective configuration for the hybrid electric vehicle (HEV). Toyota Prius, representing this type of vehicle, showed outstanding performances in fuel efficiency, emission reduction and acceleration. The excellence is largely due to the fact that it utilizes almost all operation modes of HEV. Those modes include ZEV (Zero Emission Vehicle) driving, idle stop, fuel cut-off, power assist, active charging, regenerative braking and so forth. In this paper, a few of the mode operations were simulated using AVL Cruise. Also, control logics to operate the powertrain in each mode were developed. The states of powertrain components were displayed and analyzed. By controlling the three components (engine, motor and generator), it was possible to run the powertrain in several hybrid operation modes.
안국현(Kukhyun Ahn),이진원(Chinwon Lee),임원식(Wonsik Lim),박영일(Young Il park),이장무(Jang Moo Lee) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
It's important to have a precise model of the clutch damper to simulate the entire powertrain model and predict the response of the system In this paper we developed a new model in which the spring used in the clutch damper is divided into a finite number of elements. The model takes many unique properties of arc-shaped springs into consideration and is anticipated to be more precise than conventional simple models. With that model we could present two meaningful results we can utilize afterwards. One is the simulation concerning the peak torque transmitted via clutch damper and another is that shows the characteristics of the clutch damper.
동력 분기 하이브리드 전기 자동차의 운행 모드 시뮬레이션
안국현(Ahn, Kuk-Hyun),조성태(Cho, Sung-Tae),임원식(Lim, Won-Sik),박영일(Park, Yeong-Il),이장무(Lee, Jang-Moo) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
The power split hybrid power train is considered to be one of the most prospective configuration for the hybrid electric vehicle (HEV). Toyota Prius, representing this type of vehicle, showed outstanding performances in fuel efficiency, emission reduction and acceleration. The excellence is largely due to the fact that it utilizes almost all operation modes of HEV. Those modes include ZEV (Zero Emission Vehicle) driving, idle stop, fuel cut-off, power assist, active charging, regenerative braking and so forth. In this paper, a few of the mode operations were simulated using AVL Cruise. Also, control logics to operate the powertrain in each mode were developed. The states of powertrain components were displayed and analyzed. By controlling the three components (engine, motor and generator), it was possible to run the powertrain in several hybrid operation modes.
HEV 의 연비, 배기 가스 성능 향상을 위한 주행 전략 개발
안국현(Kukhyun Ahn),윤원석(Wonseok Yoon),박영일(Yeong-il Park),이장무(Jang Moo Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Two of primary performances of diesel hybrid electric vehicles are enhanced fuel economy and reduced NOx emission. Achieving the two goals at the same time is difficult because the optimal operating regions for improving each performance indices are divided into two distinct regions in the case of diesel engines. In this paper, two attempts were made to achieve both goals by introducing a weighted sum optimization problem and an inequality constrained optimization problem when developing optimal control strategies. The ways to solve the problems were developed and the respective results from two attempts were compared.<br/>
최적 제어와 신경회로망을 이용한 하이브리드 전기자동차 시뮬레이션
김남욱(Kim, Nam-Wook),안국현(Ahn, Kuk-Hyun),조성태(Cho, Sung-Tae),임원식(Lim, Won-Sik),이장무(Lee, Jang-Moo) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
The energy management of an HEV using optimal control and global optimization is thought to be closest to the best operation of the system. However, there are some controversies on the ways of defining the optimization problems and constituting the optimal control simulators. Here, we presented a simulator which adopts the concept of equivalent fuel economy and leads the vehicle to run in a more efficient way. In order to realize the optimal operation of the HEV and check the validity of the control logics, we also developed a forward-facing simulator. The simulator was developed with the Cruise and MATLAB co-simulation interface. Especially, neural network controller was used for the hybrid control module in the simulator. With the simulator, the optimal operation could be converted into hybrid control rules and the validity of the operation was verified.
토크 및 모멘트부하의 영향을 고려한 로봇 관절의 마찰 모델
김태정(Tae Jung Kim),안국현(Kuk-Hyun Ahn),송재복(Jae-Bok Song) 대한기계학회 2021 大韓機械學會論文集A Vol.45 No.1
로봇 관절에서 발생하는 마찰은 제어시스템에 외란으로 작용하여 제어성능을 악화시키는 요인으로 작용한다. 따라서 대부분의 로봇에서는 마찰 모델을 기반으로 추정한 마찰토크를 제어입력에 반영하여 마찰을 보상하며, 마찰 모델이 정확할수록 로봇의 제어성능을 향상시킬 수 있다. 본 연구에서는 로봇링크의 하중에 의해서 발생하는 토크부하와 모멘트부하의 영향으로 다르게 발생하는 마찰 거동을 파악한다. 이를 통해 기존의 쿨롱마찰과 점성마찰로 구성된 마찰 모델에 토크부하와 모멘트부하의 영향을 고려한 항을 추가하여 보다 정확한 마찰 모델을 제안한다. 제안한 마찰 모델은 7자유도 협동로봇에 적용하여 실험을 통해 성능을 검증하였다. The friction generated in a robot joint acts as a disturbance in a control system, which affects the control performance. Therefore, in most robots, friction is compensated for by adding the estimated friction value in the control input based on the friction model. Thus, the more accurate the friction model, the better the control performance of the robot. In this study, the friction that occurred differently owing to the torque and moment loads caused by the robot links were analyzed. Through the analysis, a friction model that included the effects of torque and moment loads from the robot links was developed to improve the conventional friction model based on only the Coulomb friction and viscous friction. The proposed friction model was verified experimentally by applying the model to a 7DOF collaborative robot.
이진원(Chinwon Lee),안국현(Kukhyun Ahn),임원식(Wonsik Lim),박영일(Yeong ll Park),이장무(Jang Moo Lee) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
A torque converter is one of key component in an automatic transmission, and many new researches on a torque converter have been conducted for last 10 years. These researches include visualizations of flow field and computational fluid dynamic techniques. This paper presents relative sensitivities of design parameters using these research results and orthogonal array. The results prove that particles of design experience accumulated for many years are still valid.<br/>