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노기훈(Kihoon Noh),장성재(Sungjae Jang),유동열(Dongyeol Yoo) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
EuroNAP and KNCAP plan to apply MPDB test from 2020 and 2024 respectively. MPDB test that is a kind of car to car simulation test is a vehicle and MDB collision test with 50% offset and 50kph speed. MPDB performance is evaluated in the vehicle and the moving barrier standpoint. The vehicle deformation and the occupant injury value are major measurements of the vehicle standpoint. In case of the moving barrier standpoint, MDB’s OLC and its deformation are key factors. MPDB performance for Monocoque body has been much studied so far but study of frame body is poor. In this paper, the guideline for MPDB performance improvement of frame body is proposed through CAE concept study with a current production vehicle.
노기훈(Kihoon Noh),유동열(Dongyeol Yoo),장성재(Sungjae Jang) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
KNCAP plan to apply MPDB test from 2024. KNCAP MPDB test that is a kind of car to car simulation test is a vehicle and MDB collision test with 50% offset and 56kph speed. MPDB performance is evaluated in the vehicle and the moving barrier standpoint. The vehicle deformation and the occupant injury value are major measurements of the vehicle standpoint. In case of the moving barrier standpoint, MDBs OLC and its deformation are key factors. Research on the performance of KNCAP MPDB on the frame body is very insufficient. In addition, the recent test speed has become harsher as it is scheduled to change from 50 kph to 56 kph. In this paper, the guideline for KNCAP MPDB performance improvement of frame body is proposed through CAE concept study with a current production vehicle.
노기훈(Kihoon Noh),장성재(Sungjae Jang),유동열(Dongyeol Yoo) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
MPDB test is going to be applied to EuroNAP and KNCAP from 2020 and 2022 respectively. MPDB test is a front car to car type test that vehicle and MDB collide each other with 50% offset and 50kph speed. MPDB performance is assessed with vehicle deformation and occupant injury value in vehicle standpoint and with MDB’s OLC and its deformation in moving barrier standpoint. By the way, the study on the factors to influence on the MPDB collision performance is very rare. Therefore, in this study, key factors to influence on MPDB collision performance are selected and then their contribution is analyzed.
저속 충돌시 충돌 위치에 따른 Bumper system 성능의 영향도 분석
노기훈(Kihoon Noh),김성현(Sunghyun Kim),권율(Yul Kwon) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
Crash box in the bumper system has important role of absorbing energy. To increase energy efficiency of Crash box, firstly in case of inside shape, thickness and material must be optimized. In case of outside, It is needed appropriate impact point between Barrier and impact beam. We can modify impact point using beam sweep change and according to impact point, shape of crash box collapse is changed. In other words, Impact point is most influent variable for performance of bumper system. In this paper, I study how position of impact point give a influence to bumper system. Firstly, I execute physical test with trolley test model and using this, I make trolley CAE model. Secondary, I make some change of impact point to rotate barrier instead of modifying beam sweep. And it is applying to the trolley CAE analysis. Finally, we verify results of trolley case CAE model through full vehicle CAE analysis.
Trolley Test와 CAE를 이용한 Bumper System 개발
노기훈(Kihoon Noh),김성현(Sunghyun Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Crash box in the bumper system has important role of absorbing energy. The parameters on the absorbing crash energy are thickness, shape and material. These are major influence on absorbing energy. Therefore, three factors should be decided initial stage. In this paper, we present bumper system development process that is gone on until correlation with physical result and CAE result. Initial criteria should be determined before physical test and CAE analysis. First stage is squeezing test. Second stage, Crash box that is satisfied performance is applied to trolley FE model. And the result of physical test is correlated with the result of CAE analysis. Last stage, the result of trolley CAE analysis is correlated with the result of full vehicle CAE analysis.
4축 스테이지 속도와 가속도 변화에 따른 입출력 오차 분석
최용석(Yongsuk Choi),노기훈(Kihoon Noh),원종진(Chongjin Won),정재일(Jay I. Jeong) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Precision of stage which is used in nano imprint fabrication process is one of the element to influence in alignment process. The 4 axis stage either which is positioned continuously actuator to operator precise motion as a nano level or which is positioned and made with two actuator in each axises is possible motion of 3 degrees of freedom(X, Y, θ). but 4axis stage can be happened to mechanical error, because there are many actuator than number of degree worked by constructor, when stage is worked. so, if this reason of error is revised after understanding, 4 axis stage is more precise in the nano imprint fabrication process then there can be made more exact LCD panel. This study has a purpose to search that value was revised so that e after when working 4axis This purpose of study is calculating profile of velocity and profile of position about 4axis stage velocity difference and is search reviced value to compare result value and input-output value.
최용석(Yongsuk Choi),노기훈(Kihoon Noh),원종진(Chongjin Won),정재일(Jay I. Jeong) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, the calibration process is executed for an over-actuated precision stage, which is designed for alignment process in nano-imprint fabrication process. We measured the positional accuracy of the stage for the X-Y axis to identify position errors and performed the calibration procedure by using a lookup table and interpolation. As a result, the precision stage is calibrated to have position errors of less than 1 micrometer in X and Y axis.