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서주형(Juhyung Seo),최규흠(Kyuheum Choi),유재민(Jaemin Yoo),오주환(Juhwan Oh) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the vehicle crash, ACU triggering time of seat belt pretensioner and airbag play a significant roles in determining the effectiveness of the restraint systems. Until now, many airbag sensing companies have made efforts to develop the system which can sense the vehicle crash worthiness correctly for the sake of optimizing the ACU triggering time. In this paper, the injury performance according to the setting and changing of frontal airbag triggering time was carried out: Airbag RTTF (Recommend Time to Fire) setting methods used by the core airbag sensing companies are presented. The performance of occupant protection based on the above methods was compared and case studies caused from early/delay airbag deployment was conducted.
운전자 목 상해 최소를 위한 에어백 커버 설계에 관한 연구
서주형(Juhyung Seo),오주환(Juhwan Oh),김서홍(Seohong Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The NHTSA(National Highway Traffic Safety Administration) has published a legislative rule called FMVSS208 which requires applying the advanced airbag system. This rule regulates the neck injury rigidly in the aspect of dummy injuries. It means an introduction of the neck injury criteria Nij that is one of the most interesting subjects to safety system suppliers. To develop the airbag system that protects out-of-position occupants, it is necessary to clearly understand the neck injury and design an airbag system that reduces the neck injury. In this paper, we analyzed the effect of driver airbag cover shapes on the neck injury and proposed an optimized driver airbag cover design.
운전석 에어백 전개 상황에서 비정상 착좌 운전자 보호 성능 최적화 방안
김서홍(Seohong Kim),서주형(Juhyung Seo),조상희(Sanghee Jo) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
For most car makers & safety system suppliers who design, develop and supply occupant safety restraint system to OEM, the advanced airbag system (so called the next generation safety system) is one of the most important subject recently. This system originates from the legislative rule issued by NHTSA(National Highway Traffic Safety Administration), and the rule requires that those who intend to sell cars in North America should apply the system to their cars from 2003 in 20% to 2005 in 100% step by step. This rule demands the safety performance covering from large sized occupant to small sized female and children, which is not ensured by tile conventional airbag system. Especially, it is required to reinforce safety performance for children or small sized occupant through low risk deployment or suppression for out-of-positioned occupant.<br/> Through the current investigations, some design guidelines for advanced airbag system are presented. Based on the results of a series of experiments, design issues that apply the various factors in driver airbag are examined.<br/> <br/>
센터 폴 충돌 모드에서의 차체 펄스 분석 및 상해 성능에 관한 연구
고민석(Minseok Koh),서주형(Juhyung Seo),김건우(Gunwoo Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Various kinds of vehicle crash modes such as frontal, angle, pole crash exist in the field, and many safety engineers have analyzed vehicle pulses of those different crash modes to obtain optimal airbag inflation time and to improve occupant injury performance. Among above crash modes, pole crash frequently occurred in the field; Center pole crash test is conducted not only to simulate the crash between the vehicle and the utility pole or a roadside tree in the car development stage but also to investigate RTTF (Recommended Time To Fire) in the aspect of due care situation. In this study, center pole crash tests according to five velocity conditions were carried out, and five full frontal crash tests were conducted. The velocity conditions of center pole crash tests are 13mph, 17mph, 19mph, 23mph, and 27mph. Those of full frontal crash tests are 12mph, 16mph, 18mph, 22mph, 25mph, and 30mph. We will analyze vehicle crash acceleration pulse, velocity pulse, injury performance, and RTTF between the center pole crash and the full frontal crash.