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김은학(Eunhak Kim),김무룡(Mooryong Kim),김원섭(Wonseop Kim) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Through the fusion of high-speed camera development and DIC analysis technology, study on the airbag door motion analysis method was conducted for the airbag door deployment by using DIC technology. This study has optimized the high-speed camera setting method to apply the DIC technology and developed an analysis method for the measurement data. The analysis method was reviewed by dividing the airbag inflator into step 1, in which the airbag inflator explodes and the cushion hits the door, step 2 in which the skin of the door is cut, and step 3, in which the airbag cushion inflates and rotates the door. And data such as strain, acceleration, angle, and angular velocity based on displacement were analyzed. And 3D data were analyzed for various test conditions using the DIC analysis method. The DIC results were analyzed according to the deployment temperature, sample pretreatment, door structure, and airbag conditions, and it was confirmed that it can be utilized by performing quantitative analysis.
PAB 도어 스코링 패턴에 따른 강성 및 외관 평가에 대한 연구
김은학(Eunhak Kim),김무룡(Mooryong Kim),오영기(Youngki Oh),김원섭(Wonseop Kim) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5
The effect of the scoring pattern on the stiffness and appearance of the crash pad airbag door was studied. For the stiffness evaluation, the door stiffness in the user condition and the door opening force in the airbag deployment condition were evaluated. Appearance evaluation was evaluated for emotion in terms of tactile and visual aspects, and analysis of variance was performed to confirm that the scoring pattern and evaluation position were significant factors. In addition, quantitative evaluation was performed by measuring the appearance curvature with DIC equipment, and the results were analyzed for deflection and defect map. A correlation analysis was conducted on these stiffness and appearance evaluation results, and it was confirmed that the amount of deflection had a high correlation with the tactile evaluation, and the defect map had a high correlation with the visual evaluation.
CFD를 이용한 Invisible Air vent의 공조성능 최적화
김연주(Younju Kim),최봉근(Bongkeun Choi),유영진(Youngjin Yoo),김무룡(Mooryong Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Air conditioning system in vehicle controls the temperature of cabin to provide driver a convenient and safe environment. Air vent, which is an important component of air conditioning system, controls air flow rate and flow direction. Manual control of air vent can cause unpleasant and dangerous situation while driving. To overcome these problems, invisible air vent was developed. Unlike conventional air vent, invisible air vent is composed of vent and cover. Besides its beautiful appearance, it is able to control the temperature of cabin more naturally than conventional system can do. However it was not easy to distribute flow to all direction. In this research, CFD analysis and optimization were performed to develop the performance of an invisible air vent system. Firstly, optimizing factors and those levels were selected using DOE and from this table CFD analyses were performed to find the optimized design. As a result, it was found that the inner angle of an air vent’s cover hole was the main factor of performance.