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박건홍(Gunhong Park),장유신(Yushin Chang),류재헌(Jaeheon Ryu),박석현(Seokhyun Park),이춘한(Chunhan Lee),홍신표(Sinpyo Hong),이만형(Manhyung Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
In this paper deals with a unique method for measuring vehicle states such as body sideslip angle and tire<br/> sideslip angle using GPS velocity information in conjunction with other sensors. A method for integrating<br/> Inertial Navigation System (INS) sensors with GPS measurements to provide higher update rate estimates of<br/> the vehicle states is presented, and the method can be used to estimate the tire cornering stiffness. The<br/> experimental results for the GPS velocity-based sideslip angle measurement and cornering stiffness estimates<br/> are compared with the theoretical predictions. From the experimental results, it can be concluded that the<br/> proposed method has an advantage for future implementation in a vehicle safety system.
GPS를 이용한 차량의 Sideslip Angle 추정
박건홍(Gunhong Park),장유신(Yushin Chang),류재헌(Jaeheon Ryu),이춘한(Chunhan Lee),박석현(Seokhyun Park),이만형(Manhyung Lee) 한국자동차공학회 2004 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
This paper proposes a new method to estimate vehicle state such as sideslip angle and lateral velocity integrating Global Positioning System(GPS) and Inertial Measurement Unit(IMU). The method Integrating GPS and IMU provides more precise and high rate speed information that is necessary to get sideslip angle and lateral velocity. To integrate the GPS and IMU, Kalman filter is used. The experimental results for the GPS velocity-based sideslip angle measurement and lateral velocity estimates are compared with the theoretical predictions. Using these vehicle state, vehicle control system can be improved such as braking control, stability control and lateral control system
자동차용 Heatsink의 열전도도 향상을 위한 다이캐스팅 알루미늄 합금 및 열처리 최적 조건 개발
김주행(Juhaing Kim),정경(Kyung Jeong),박석현(Seokhyun Park),정윤철(Yooncheol Jung) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
As eco-friendly automobiles are expanded, electronic control systems are also required to have high performance. Therefore, ECUs and motors, which are essential for electronic control systems, require higher heat dissipation characteristics than conventional ones. In order to achieve high heat dissipation characteristics, it is necessary to improve the thermal conductivity of Heatsink itself, which is directly contacts the heat source and transfers heat quickly among various components. As the conventional Heatsink materials, aluminum alloys which have excellent thermal conductivity characteristics have been applied. In case of low-solute alloy, the thermal conductivity is the highest. However, in the case of automotive Heatsink, a very complicated shape is required, and in order to realize this, it is necessary to manufacture parts by die casting of a high-solute aluminum alloy. As a result, it has lower thermal conductivity than low solute aluminum alloy. In this study, the optimum alloy composition capable of high pressure casting with 7% Si content and T5 heat treatment were applied to achieve thermal conductivity of 178W/mK. This result is a high thermal conductivity characteristic of low-solute wrought aluminum alloy products, resulting in a 38% improvement over ADC12, a commercial die-cast alloy. At the same time, heatsinks for large-capacity motors(BSG) were developed by securing the same castability as ADC12.