http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
호주 신차안전도평가의 하부다리 상해치 개선을 위한 경차의 Footrest 형상 최적화
김요셉,이만수,남정인,한재녕,Kim, Joseph,Lee, Mansu,Nam, Joungin,Han, Jaenyung 한국자동차안전학회 2015 자동차안전학회지 Vol.7 No.1
In order to protect occupant during car crash accident, Regulation and NCAP(New Car assessment Program) have been developed among various countries like U.S.A., Europe, Korea and Australia. Especially NCAP scores affect to sales of vehicles. So vehicle makers are trying to get good score in NCAP. Low leg injuries play an important role in Australia and Euro NCAP and these injuries are related with footrest design. Optimization of footrest design in early stage of vehicle development is necessary to obtain better and robust results of low legs during crash tests. In this paper, DFSS method and finite element model were used to optimize the low leg performance in small RHD vehicles. Compared with the lower leg injury of base model, the lower leg injury of proposed model was slightly improved and robustness was enhanced also.
정면 모의충돌시험에서 운전자 흉부가속도 유형에 따른 조향핸들과의 흉부접촉에 대한 연구
김요셉(Joseph Kim),임경호(Kyung-ho Lim),범현균(Hyen-kyun Beom),권성은(Sung-eun Kwon) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The increasing number of vehicles has given rise to frequent traffic accidents. The safety become one of the most important factor for customers to purchase a car. To meet customers' needs, NCAP(New Car Assessment Program) test is performed in many country such as US, Korea, and Europe. EuroNCAP performance becomes important to Korean car makers as the number of exporting vehicle to Europe market increases. The assessment of EuroNCAP frontal crash test includes the criteria of dummy injuries, vehicle measurements of deformation and the subjective modifier. Among the subjective modifier. the Chest Contact Modifier is one of the most ambiguous modifier because of difficulties in getting sufficient clues. In this paper, sled test was carried out using KNCAP full frontal crash pulse to analyze shape patterns of chest acceleration pulse which is one of the information of chest contact modifier. The test result was showed that four patterns of obscure pulse shape in vehicle crash test were categorized and these pulse patterns were clearly revealed to be occurring chest contact or not.
김요셉(Joseph Kim),윤나영(Nayoung Yoon),이재우(Jaewoo Lee),조기순(Kisoon Cho) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Airbags have improved the performance of adults occupant safety. However children who sit in front passenger seats have got fatal injuries. Due to this risk of airbags to children, National Highway Transportation and Safety Administration has made vehicles equipped with Automatic Suppression Systems. These systems detect the passenger status such as adults, children and CRS. Using this information of passenger status, Sensing & Diagnosis Module makes decision whether passenger front airbag is suppressed or deployed. In this paper, Performance and qualities of two types of passenger sensing systems were compared. One uses pattern recognition system and the other uses weight recognition system. Pattern recognition system uses pressure distribution pattern of occupant and weight recognition system uses weight of occupant to classify the occupants. In this research, Sensors of pattern recognition system were located on top of cushion but sensors of weight recognition system were behind cushion foam. In order to measure the performance, correct decision ratio of 5th%ile was used and quality index was used for defining the qualities. The results showed that average correct decision ratio of pattern recognition system and weight base system were 98.84% and 98.52% respectively. Both systems had good performance but positions of 5th%ile which have incorrect decision were different. In order to compare the quality, quality index was used. Quality index was measured by the incidents ratio from fields. When this index of pattern recognition system is 100%, the index of weight recognition system was 40%. Both systems had good enough qualities but weight recognition system was better because it seemed that sensor location of weight recognition system is under cushion of seats.
김요셉(Joseph Kim),고유석(Yuseok Ko),선주형(Juhyoung Sun),윤나영(Nayoung Yoon),조기순(Kisoon Cho) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
As the number of vehicles is increasing, the number of accidents is also increasing. Recently, customers are requiring safer vehicles, so vehicle makers are equipping not only the frontal airbags but also side airbags. Many countries regulate the vehicles safety and develop the NCAP with more severe criteria. To meet these customer requirements and NCAP criteria, it is important to deploy the airbags properly. Side crash sensors are needed to deploy the side airbags. In this study, the method for selecting the robust position of crash sensors at C-pillar was proposed using DFSS methods. First, 4 points were selected with consideration of other parts like holes and harness. Then CAEs with various MDB were performed and get acceleration data from selected points. Each pulses were scaled with ±10% and velocities of each pulse were calculated. From theses velocity, The time when the velocity crossed threshold was used for TTF(Time to Fire). Because faster times of airbag deployment were usually required, DFSS was performed as ‘smaller the better’ criteria. The selected point was verified with 2nd row pole test. In conclusion, response of C-pillar acceleration sensors were better than acceleration from B-pillar sensor and robust position could be selected with this DFSS method.
김요셉(Joseph Kim),이준섭(Jun Seob Lee),진희승(Hee Seung Chin) 대한안과학회 2021 대한안과학회지 Vol.62 No.6
목적: 망막전막의 수술 전 특성을 분석하여 망막전막제거술의 수술 어려움을 예측하고자 하였다. 대상과 방법: 2016년부터 2020년까지 특발성 망막전막으로 진단받고 망막전막제거술을 시행받은 75명의 환자를 대상으로 비디오 분석을 통해 수술 시간을 측정한 후 수술 전 칼라안저사진 소견(망막전막의 혼탁, 망막주름, 혈관구불거림), 빛간섭단층촬영 소견(망막전막 단계[stage], 망막전막과 내경계막 사이의 섬유성 변화)과의 연관성을 평가하였다. 결과: 수술 시간과 관련된 요인은 혈관구불거림, 망막전막 단계, 섬유성 변화였다(p=0.024, p=0.020, p=0.018). 더미회귀분석을 통해 망막전막 4단계, 혈관구불거림 2단계(보통) 이상 존재할 때 수술 시간이 증가하는 것으로 확인되었다(p=0.036, p=0.049). 결론: 수술 전 검사에서 망막전막 4단계, 혈관구불거림이 2단계(보통) 이상일 때는 수술이 어려울 가능성이 있으므로 망막수술 초심자의 경우에는 수술 환자 선택 시 고려해야 할 것으로 판단한다. Purpose: We sought to predict how difficult surgical removal of an epiretinal membrane (ERM) might be by analyzing the preoperative characteristics of the ERM. Methods: From 2016 to 2020, 75 patients diagnosed with idiopathic ERMs who underwent ERM removal were evaluated in terms of surgical time (via video analysis); associations between that time and preoperative color fundus photographs and optical coherence tomography findings were sought. Results: The surgical time was associated with the vascular tortuosity grade, the ERM stage, and fibrillary changes (p = 0.024, p = 0.020, and p = 0.018). Dummy regression analysis showed that EMR stage 4, and vascular tortuosity grades of 2 or 3, increased the surgical time (p = 0.036, p = 0.049). Conclusions: Surgery may be difficult if the ERM is of stage 4 or the vascular tortuosity grade 2 or more. A retinal surgery novice should consider these factors when contemplating surgery.
ADVISER를 이용한 EuroNCAP 정면 충돌 시험의 정략적 비교
김요셉(Joseph Kim),범현균(Hyenkyun Beom),권성은(Sungeun Kwon) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, customers need safer cars. To meet customers’ need, NCAP(New Car Assessment Program) is performed in Europe, US and Korea by government or insurance company. In order to get a good point in NCAP test, many vehicle crash tests were carried out in developing stage by the manufacturer. The vehicle crash test has many difficulties in repeatability and robustness in the result. These various results were caused by the several factors, for example different test facilities, setup condition, test vehicle, and test speed etc. In this paper, several test result of EuroNCAP frontal test which is sensitive to the test conditions were analyzed. In addition, the influences of the test sites and the build-phase variance were analyzed by qualitatively evaluation using ADVISER. The results show the variance of pulses can be rated qualitatively and there are different scores according to test site and build phase. The vehicle deceleration pulse of impact side is more sensitive than opposite side pulse. The engine pulse is most sensitive but chest deflection is not sensitive to the change of vehicle.