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국가별 좌석 안전성 평가 방법에 따른 머리지지대 최적화 설계
유혁진,임종현,윤일성,Yoo, Hyukjin,Yim, Jonghyun,Yoon, Ilsung 한국자동차안전학회 2013 자동차안전학회지 Vol.5 No.2
The whiplash Injuries due to rear collision occur frequently. As result, in many countries, seat performance is being assessed and developed to improve head whiplash injury in rear collision of passenger car. This study compares whiplash assessment methods in each country. Using the DFSS(Design for Six Sigma) method, the correlation between influence parameters of head restraints and whiplash injury criteria is analyzed. Four control factors are used in this study. And total 11 whiplash injury criteria from NCAP(New Car Assessment Program) of Korea, Europe, China and IIHS(Insurance Institute for Highway Safety) of USA are used for output response. By the experimental design, L9 orthogonal coordinate system is configured and is tested by sled test equipment, twice. By using average assay value and ANOVA, the correlation between control factors and injury criteria has been comprehended. Optimization design of head restraint according the regional seat safety assessment was derived through the correlation.
제한속도정보제공장치(SLIF)에 대한 한국 환경 평가 분석
이화수,심지환,임종현,이홍국,장경진,유송민,Lee, Hwasoo,Sim, Jihwan,Yim, Jonghyun,Lee, Hongguk,Chang, Kyungjin,Yoo, Songmin 한국자동차안전학회 2015 자동차안전학회지 Vol.7 No.4
Exceeding the speed limit during vehicle driving is a key factor in the severity of lots of road accidents, and SLIF(Speed Limit Information Function) application is in the initial phase in Korea. SLIF helps the drivers to observe a speed limit when they are driving by providing alert and informing the current limit speed information based on external data using camera and/or digital map, for that reason, environmental conditions could be causes of SLIF malfunctions. In this study, design adequacy analysis of SLIF in respect of false recognition as the Korea traffic environment has been performed. As tentative results, road conditions and structure of speed limit sign as well as system performance often caused misrecognition.
iGLAD 사고 분류 유형을 이용한 자전거 탑승자 교통사고 분석
이화수,장은지,임종현,이지민,김재훈,송봉섭,Lee, Hwasoo,Jang, Eunji,Yim, Jonghyun,Lee, Jimin,Kim, Jaehoon,Song, Bongsob 한국자동차안전학회 2018 자동차안전학회지 Vol.10 No.1
This paper reports an analysis of cyclist accident cases with respect to passenger vehicles on Korean roads. A typology based on Initiative for the Global Harmonization of Accident Data (iGLAD) code book is applied to a traffic accident analysis system(TAAS), which has the real-world crash data on Korea roads, to understand the accident scenarios in more detail and efficiently. Similarly this typology has been used for Germany In-Depth Accidents Study (GIDAS) as well. The accident data analysis with consideration of the typology of Korean road conditions may prioritize traffic safety issues regarding cyclists and is aimed to develop an Automatic Emergency Braking (AEB) system for cyclist. In summary, this paper characterizes and analyzes the scenarios of cyclist crashes with passenger car. The most common accident scenarios on Korean roads are Car-to-Bicyclist Nearside Adult (CBNA) and Car-to-Bicyclist Longitudinal Adult (CBLA), which are more than 86% of total accidents cases. Therefore, it is inferred that AEB cyclist system should include these accident types in the operational design domain to reduce more fatality in Korea.
준중형급 승용차에서의 RCAR 성능 개선을 위한 해석적 연구
윤창용(Changyong Yoon),임종현(Jonghyun Yim),곽라경(Rakyung Gwak) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Today, vehicle repairability of passenger cars in low-speed crash is becoming a key element of their purchasing decision for car buyers, and it has been an important topic in RCAR (Research Council for Automobile Repairs) performance development. Appling the repairable components(breakable mounting bracket, Pin, etc.) prevent serious damage of the expensive component such as CRFM. Therefore, vehicle manufacturers have tried to improve repairability and to reduce the repair cost using repairable component. In this paper, CAE development study has been performed to reduce the repair cost, and production design was applied to compact passenger car in the Europe and Korea market. To get more accurate simulation result of RCAR test mode, physical test was performed and compared with CAE result. Plastic strain criteria in CAE result review is also set-up as part damage guideline. Finally, developed vehicle was successfully assessed by KART(Korea Insurance Repair Research and Training Center) in 2008.
New USNCAP 전방 조수석 승객의 안전도 개선을 위한 해석적 연구
이해성(Haeseong Lee),임종현(Jonghyun Yim),김동석(Dongseok Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
For model year (MY) 2010, the United States Department of Transportation's (USDOT) National Highway Traffic Safety Administration (NHTSA) will make changes to its existing U.S. New Car Assessment Program (USNCAP). For the frontal crash test program, NHTSA will maintain the 56 kph full frontal barrier test protocol but will update the test dummies and associated injury criteria used to assess and assign a vehicle's frontal impact star rating. The Hybrid III 5th %ile female dummy will be used in the right front passenger position, the body regions and injury criteria will be changed to head (HIC15), neck (Nij, tension, and compression), chest (deflection), and femur (axial force). The risk of injury for Nij=0 is 3.8 %, so that this injury should be given more weight. To achieve lower risk of neck injury, the movement of pelvis, torso, and head have to be balanced. Furthermore improvement of the chest deflection is essential. For the 5th %ile female dummy in the passenger side is more sensitive than 50th %ile dummy. Through combination of other restraint systems such as airbag, load limiter and pretensioner of seat belt, neck injury has improved.
양성훈(Sunghoon Yang),임종현(Jonghyun Yim),김승기(Seungki Kim),채수원(Soo-Won Chae) 한국자동차공학회 2017 한국 자동차공학회논문집 Vol.25 No.2
In this study, the relationship between the shape of a passenger airbag and the possibility of injury is analyzed using the Taguchi method. The optimal shape combination is proposed for a design guideline that can reduce the possibility of injury to the dummy. The airbag FE model for analysis is obtained using a CAD system that can change the shape through several independent variables. The widths of the left / right, top / bottom, and back / forth direction of the airbag shape are set as the design factors, and the effect of the combination injury probability according to the shape is analyzed. The minimum geometric combinations are obtained using the orthogonal array method. The signal to noise ratio is calculated and the optimal shape combination is obtained through sensitivity analysis. The obtained optimal shape combination is compared with the possibility of injury of the initial airbag shape to confirm improved airbag performance.