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[차량운동성능부문] 차량 동역학 시뮬레이션을 위한 도로면 형상 측정 기술 개발
노기한(Kihan Noh),최규재(Gyoojae Choi),임종순(Jongsoon Im),박종화(Jonghwa Park),허승진(Sungjin Heo) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Road profiling is a means to measure the surface contour of road. The measured road profiles can provide the research organizations with valuable data to perform vehicle testing and computer simulations. Many road profile measuring systems have been developed up to the present. As the Dynamic Road Profiling Devices(DRPD), An Accelerometer Established Inertial Profiling Reference (AEIPR) method is to measure the elevation of the road surface to a certain degree of accuracy along the direction of travel at a normal highway speed. This paper describes to construct DRPD and the signal processing for advanced double integration and road profiling for AEIPR method. The measured road profiles using the methods are in good agreements with real road elevation.
국내도로에 대한 샤시부품의 가속 내구하중 평가기술에 관한 연구
노기한(Kihan Noh),임종순(Jongsoon Im),김기훈(Gihoon Kim),김대성(Daesung Kim) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
In this research a systematic method to evaluate the durability loads on Korean roads is constructed and a study is<br/> carried out to determine accelerated durability loads, to improve the durability of chassis components. For this the<br/> conditions of Korean target load for vehicles are decided, roads in Korea are classified into 5 types and 6-axis forces<br/> on wheel and loads on chassis components in various vehicles are measured on the roads. Then Korean target load is<br/> developed through the normalization and combination of loads in each vehicle and by using pseudo-damage and<br/> rainflow matrix. An accelerated durability load equivalent to the Korean target load is further derived from a<br/> correlation between Korean roads and special roads in a proving ground in Korea and compared with international<br/> target loads. It is expected that this research result can provide basic and essential resources to virtual engineering that<br/> are being studied actively.
다물체 동역학기반 BBW 시스템 적용 차량동역학 해석모델 개발
김도현(Dohyun Kim),노기한(Kihan Noh),최형진(Hyeongjin Choi),김명준(Myoungjune Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
본 연구에서는 BBW 시스템의 핵심부품인 전ㆍ후륜 EMB의 단품 해석모델을 개발하고, 이를 적용한 전차량 해석모델을 개발하였다. EMB 단품 해석모델은 다물체동역학 해석 S/W인 ADAMS를 이용하여 개발하였으며, 마찰이 없는 이상적인 상태에서의 이론적인 계산결과와 비교를 통해 모델의 구성을 검증하고, 실제 H/W의 Dynamometer 시험결과와 비교를 통해 최종 모델의 적합성을 검증하였다. 또한 개발된 전ㆍ후륜 EMB 해석모델을 전차량 해석모델에 적용하였으며, 주행시 제동 시뮬레이션을 수행하여 EMB 시스템의 제동 성능을 분석하였다.
김도현(Dohyun Kim),노기한(Kihan Noh),손영욱(Youngwook Son),박기환(Kyihwan Park),유창희(Chang-hee Yoo) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
본 연구에서는 비접촉식 보조제동장치 개발을 위한 대상 시스템 및 차량 동역학 해석 모델을 개발하고, 시뮬레이션을 통해 제동 성능을 분석하였다. 동역학 해석 모델은 다물체동역학 해석 S/W인 ADAMS를 이용하여 개발하였으며, Simulink로 개발된 수학적 모델을 연동하여 ADAMS/Simulink co-simulation을 수행하였다. 제동시뮬레이션은 직진 주행시 제동과 오르막 및 내리막 주행시 제동 조건에서 수행하였으며, 내리막 및 오르막길은 경사각 10, 20, 30%의 조건을 적용하였다.
최형진(Hyungjeen Choi),노기한(Kihan Noh) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The suspension system plays a major in the vertical ride performance of vehicle. In this research, Hardware-in-the-Loop Simulation system to evaluate suspension system was categorized into direct and indirect types. While the proposed direct HILS system was to evaluate damper only by reproducing vertical damper motion from the viewpoint of damper using an actuator, the second indirect proposed HILS system was to evaluate suspension from the viewpoint of vehicle. Unlike the first, the second system included tire, spring, damper and suspension linkage, which reproduced the road profile and the sprung mass motions at a same time. The indirect HILS system was built up in the research, and the simulation results were evaluated with comparison with the real vehicle ride test on Korea Automotive Technology Institute Proving Ground. The HILS system for suspension was expected to apply to evaluate various suspension systems with such as MR CDC damper and CDC damper as well as conventional damper.
정대이(Daeyi Jung),노기한(Kihan Noh),최형진(Hyungjeen Choi),이경수(Kyoungsu Yi) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It's significant to considerate human factors for the design of the advanced safety vehicle beyond the general vehicle's performance. Therefore, the development of human driver model to imitate the real human drive pattern is useful for the commencement of advanced vehicle research to reflect the human factors. In this paper, several experiments to verify the human factors of driving a vehicle and the control logic to describe the human's drive logic process are presented. Human factors to influence a vehicle operation are assumed to be consisted of two major components, the preview distance recognition and the human neuromuscular system. The finite preview optimal control strategy has been applied due to the similarity of human's situation awareness in a driving condition. Ultimately, combining the control logic with human factors, the representative human driver model has been developed and simulated with ADAMS/CAR in SIMULINK environment. The simulation results have been compared to the actual vehicle test data (DLC road course test result) in terms of driving experience classified by Novice, Intermediate, and Expert. It has been concluded that the representative human driver model presented in this paper is sufficient to describe the human drive pattern sorted by driving experience.
김도현(Do-Hyun Kim),노기한(Kihan Noh),최형진(Hyungjeen Choi),문희석(Heeseok Moon),손영욱(Youngwook Son) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
본 연구에서는 전기동력이륜차 개발을 위한 대상차량의 실시간 차량모델을 개발하고, 실차주행시험을 통해 개발된 차량모델의 검증을 수행하였다. 실시간 차량모델은 이륜차 전용 해석 S/W인 BikeSim을 이용하여 개발하였으며, 3차원 데이터 측정장비인 FaroArm을 이용하여 차량모델 개발에 필요한 대상차량의 주요 Hard point를 측정하였다. 또한 대상 차량의 Tear-down을 통해 주요 part의 관성을 측정하고 이를 관성정보를 측정하였다. 개발된 차량모델의 검증을 위해 J-turn, DLC, Slalom 등의 실차주행시험을 수행하였고, 실차시험 결과와 차량모델의 시뮬레이션 결과를 비교하여 RMS 오차가 5%미만인 것을 확인함으로써 개발된 차량모델을 검증하였다.
Electro Mechanical Brake 시스템의 해석 및 검증
김도현(Do-Hyun Kim),노기한(Kihan Noh),최형진(Hyeongjin Choi),김주곤(Joogon Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This paper is focused on simulation and verification of the EMB(Electro Mechanical Brake) system newly developed by the Mando Corporation. In this paper, the virtual model was made in the dynamic analysis software, ADAMS and its verification was achieved by the correlation between the result of an experiment and the simulation result. The correlation in the static state was achieved by the comparison between the result of the experiment using the Load Cell and the simulation result. In the dynamic state the correlation was achieved by the comparison between the braking torque of the dynamometer test and the simulation result. As the result of this process, the virtual model used in this simulation is verified that it is reasonable to be applied to other EMB systems.