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ADAS 시스템의 고장 주입 시뮬레이션 환경 개발 및 고장 안전성 평가 사례 연구
김두용(Dooyong Kim),임재환(Jaehwan Lim),이혁기(Hyuckkee Lee),최인성(Inseong Choi),신재곤(Jaekon Shin),홍윤석(Yunseog Hong),박기홍(Kihong Park) 한국자동차공학회 2017 한국 자동차공학회논문집 Vol.25 No.6
As chassis control technologies advance to ADAS and autonomous driving, the driver’s role in controlling the vehicle motion weakens. Accordingly, fail safety becomes very important since any failure while the driver is not fully engaged in control of the vehicle can be fatal. In this study, a fault injection simulation environment has been developed and case studies have been performed to investigate whether and how fail safety of the ADAS systems can be evaluated on a pure simulation environment. To do this, two ADAS modules and two chassis control modules were modeled in detail such that a fault can be injected to their individual low-level components. Scenarios for the fault injection tests were carefully derived by following the ISO 26262 processes. The simulation results demonstrated that an essential part of fail safety evaluation of the ADAS systems could be successfully made on a fault injection simulation environment.
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2차 충돌 회피 알고리즘 개발을 위한 충돌 시뮬레이션 환경 개발
김두용(Dooyong Kim),조승우(Seungwoo jo),소민우(Minwoo Soh),권재준(Jaejoon Kwon),홍태욱(Taewook Hong),박기홍(Kihong Park) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
Nowadays, the interest of advanced safety vehicle is increasing. As a result also research of active safety system is in progress. And, most of the active safety system was developed for the avoidance or mitigation of first crash. But, according to the recent study, secondary crash is more dangerous than first crash. So recently many vehicle company have developed secondary crash system. For the algorithm development, the simulation of vehicle crash is required. However, many vehicle dynamics analysis programs can"t simulate vehicle crash. And also programs that possible to simulate vehicle crash are not easy to develop the algorithm such as secondary crash algorithm. So, in this paper, the crash simulation environment for developing secondary crash avoidance algorithm was developed and validated.
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홍순필(Soon-pil Hong),김문주(Mun-joo Kim),김은성(Eun-sung Kim),김두용(Dooyong Kim),홍진우(Jin-woo Hong),김기완(Kiwan Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
The light gets darker from center to edge of the light source. Therefore, we can find the center of the sun using shading histogram. Moreover, we can track the exact position of the sun with the shading histogram. In this paper, we propose a new technique using image-processing of digital camera, in order to locate the position of the sun.
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제동 액츄에이터 손상을 고려한 2차 충돌 예방에 관한 연구
양희철(Heecheol Yang),김두용(Dooyong Kim),강태완(Taewan Kang),소민우(Minwoo Soh),권재준(Jaejoon Kwon),박기홍(Kihong Park) 한국자동차공학회 2015 한국 자동차공학회논문집 Vol.23 No.5
Reportedly the fatality rate from secondary collision is six times higher than the average fatality rate from all traffic accidents. So prevention of the secondary collision is attracting significant attention from automotive industries. However, the secondary collision prevention systems that have been developed are not considering possibility of brake actuator failure that can occur by the impact during the initial collision. In this paper, a new system has been developed that could prevent secondary collision even in case of brake actuator failure by taking advantage of still operating actuators. In this system, a steering control is performed for maintaining a lane by using linear quadratic regulator. Additionally, the system attempts differential brake control with the remaining braking capability to stop the vehicle in the shortest distance. Through simulation in various collision scenarios, the system has demonstrated significant potential of preventing secondary collision that could otherwise have resulted in severe fatality.
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통계적 기법을 이용한 차량 안전벨트 시스템의 슬레드 해석과 시험 상관성 개선
이광섭(Kwangseop Lee),김두용(Dooyong Kim),윤홍식(Hongsik Yun),이경상(Kyeongsang Lee) 한국자동차공학회 2015 한국 자동차공학회논문집 Vol.23 No.4
This study compares the results of a sled test and FEA(Finite Element Analysis) of a vehicle seatbelt system and aims to propose a method to efficiently reduce the error rate in the results of the FEA. This study evaluates the relative importance of potential causes, applying AHP(Analytic Hierarchy Process) technique in order to improve the reliability of the result of the FEA, and draw a highly reliable result of FEA, conducting a Taguchi Method and optimization for reducing the error rate in the FEA through the design of experiments.
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2차 충돌 예방을 위한 충돌 후 차량 안정성 확보에 관한 연구
류은혜(Eunhye Ryu),김두용(Dooyong Kim),소민우(Minwoo Soh),권재준(Jaejoon Kwon),홍태욱(Taewook Hong),박기홍(Kihong Park) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
Traffic statistics have shown secondary or multiple event causes fatal injuries more than single event. In this paper, the Secondary Collision Mitigation Algorithm is developed for securing of vehicle stability after impacts. For appropriate control the target yaw rate is created to minimize heading angle and lateral deviation through overlay torque of MDPS and differential braking with ESC module. Impact forces are predicted by 3DOF Collision Model to reconstruct traffic accidents, and these are adopted as CarSim external forces. The performance verification of proposed algorithm is conducted SILS with CarSim.
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다구찌 방법을 이용한 시트벨트의 유아용 시트 감지 장치 최적화 설계에 관한 연구
전계범(Gyebeom Jeon),김두용(Dooyong Kim),신동유(Dongyou Shin) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
The child seat sensing unit, called ALR Switch, detects the activation of theAutomatic Locking Retractor (ALR) that allows the child seat to be secured in the car. It also sends a signal to the car, allowing the car to determine whether the child seat is installed. Applying an ALR switch to a seatbelt retractor only allows limited space and requires many design factors. In this study, an optimization design of the ALR Switch based on the Taguchi method was performed so that the ALR Switch can accurately and reliably detect the ALR operation status.
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조향 회피 시스템의 성능 개선을 위한 ESC/RWS 통합 샤시 제어
조환성(Hwanseong Jo),김두용(Dooyong Kim),강태완(Taewan Kang),소민우(Minwoo Soh),권재준(Jaejoon Kwon),박기홍(Kihong Park) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
This paper presents an performance improvement of emergency avoidance system with Electronic Stability Control(ESC) & Rear Wheel Steer(RWS) integrated control. ESC system is designed using Sliding Mode Control(SMC), which is one of high robustness variable structure control system. Front wheel steering angle and rear wheel steering angle are calculated by using Linear Quadratic Regulator(LQR). The desired trajectory for collision avoidance is determined by a 5th order polynomial. The desired steering wheel angle to follow the trajectory is calculated with Vector pursuit and the current position of the vehicle is estimated by using the Observer. The results indicate that the proposed logics can delay last time to steer for collision avoidance.
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