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이경수(Kyongsu Yi),최재웅(Jaewoong Choi) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.12
본 논문은 종/횡방향 충돌 회피 시스템의 통합을 통한 통합 위험 관리 시스템 (IRMS) 에 대하여 기술하였다. 이를 위하여 종/횡방향 충돌 위험을 나타낼 수 있는 지표가 개발되었으며, 이를 통하여 통합 제어 전략을 구성하였다. 충돌 회피 제어를 위하여 운전자-제어기-차량 시스템에 대한 선형 모델을 구성, 이를 바탕으로 운전자-제어기간 협력을 통한 충돌 회피 제어 알고리듬을 개발하였다. 개발된 통합 위험 관리 시스템은 차량 동역학 모의 시험 프로그램인 CARSIM 과 MATLAB/Simulink 를 연동, 모의시험을 통하여 성능을 확인하였다. This paper presents an Integrated Risk Management System (IRMS), which is designed to integrate longitudinal and lateral collision avoidance systems. Indices representing longitudinal and lateral collision risks are designed. From the designed indices, an integrated control strategy is designed. A collision avoidance algorithm is designed to assist the driver in avoiding collisions by using a vehicle-driver-controller integrated linear model. The performance of the proposed algorithm is investigated via computer simulations conducted using the vehicle dynamics software CARSIM and Matlab/Simulink.
이경수(Yi.Kyongsu) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The peak dynamic tire loads. which are greatly in excess of static loads. are highly dependent on the dynamic characteristics of vehicle suspensions. Analytical research has shown that the vehicle-generated pavement damage can be reduced by using more advanced suspensions. This paper describes a proposed semi-active suspensions for heavy vehicles to reduce the dynamic tire forces. Simulation studies are presented to compare the performance of the advanced suspensions with the four leaf tandem suspensions.<br/>
이경수(Kyongsu Yi),최재웅(Jaewoong Choi) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.4
본 논문은 종/횡방향 충돌 회피 시스템의 통합을 통한 통합 위험 관리 시스템 (Irms)에 대하여 기술하였다. 이를 위하여 종/횡방향 충돌 위험을 나타낼 수 있는 지표가 개발되었으며, 이를 통하여 통합 제어 전략을 구성하였다. 충돌 회피 제어를 위하여 운전자-제어기간 협력을 통한 충돌 회피 제어 알고리듬을 개발하였다. 개발된 통합 위험 관리 시스템은 차량 동역학 모의 시험 프로그램인 CARSIM과 MATLAB/Simulink를 연동, 모의시험을 통하여 성능을 확인하였다. This paper present IRMS(Integrated Risk Management System) which is designed to integrate longitudinal and lateral collision avoidance systems. Indices represent longitudinal and lateral collision risks are designed. Collision avoidance algorithm is designed to cooperate with driver to avoid collision using vehicle-driver-controller integrated linear model. The performance of proposed algorithm has been investigated via computer simulation conducted to vehicle dynamic software CARSIM and Matlab/Simulink.
이경수(Kyongsu Yi),문일기(Ilki Moon) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.2
This paper presents a vehicle control algorithm for stop and go cruise control systems which makes the vehicle remain at a safe distance from a preceding vehicle according to the driver's preference, automatically slow down and come to a full stop behind a preceding vehicle. The control algorithm consists of speed and distance control algorithm and a combined throttle/brake control law. Throttle and brake actuators are controlled by the throttle/brake control law so that the vehicle acceleration tracks the desired acceleration designed based on the vehicle speed and distance control algorithm. A stepper motor and an electronic vacuum booster have been used for the throttle and brake actuators. The throttle and brake actuators have been tested and the actuator dynamics has been incorporated in simulation study. The uncertainties of vehicle model have been considered in the design of the control law. The effect of throttle/brake control has been investigated via simulations. The simulations were performed using a complete nonlinear vehicle model. The results indicate that the proposed control law can provide the stop and go cruise control system with a good distance and velocity tracking performance.
자전거 탑승자 대상 자동비상제동장치의 성능평가 시나리오
김태우,이경수,민경찬,이은덕,Kim, Taewoo,Yi, Kyongsu,Min, Kyongchan,Lee, EunDok 한국자동차안전학회 2017 자동차안전학회지 Vol.9 No.1
This paper present a performance evaluation scenarios to assess the safety performance of autonomous emergency braking (AEB) system for cyclist collision. To guarantee the safety performance of AEB for cyclist, AEB system should be tested in various scenarios which can be occurred in real driving condition. For this, real-traffic car-to-cyclist collision data are analyzed to classify the real traffic collision scenarios. Using this information, typical car-to-cyclist collision scenarios are selected. Also, in order to develop the detail features of these collision scenarios, several accident cases related with these scenarios are explained. Based on these information, test scenarios which can describe the car-to-cyclist collisions occurred in Korea are proposed. For practicality and feasibility of the test scenarios, proposed scenarios should be designed to assess the safety performance of AEB system effectively. For this, some test scenarios are combined or removed based on the consideration about the effectiveness of each scenario to the assessment of the performance of AEB system. To confirm that the proposed test scenarios are realistic and physically meaningful, simulation is conducted using simple AEB system in proposed test scenarios.
전자식 차동 제한장치를 이용한 후륜구동 차량의 횡방향 안정성 제어
차현수,이경수,Cha, Hyunsoo,Yi, Kyongsu 한국자동차안전학회 2021 자동차안전학회지 Vol.13 No.3
This paper presents a lateral stability control for rear wheel drive (RWD) vehicles using electronic limited slip differentials (eLSD). The proposed eLSD controller is designed to increase the understeer characteristic by transferring torque from the outside to inside wheel. The proposed algorithm is devised to improve the lateral responses at the steady state and transient cornering. In the steady state response, the proposed algorithm can extend the region of linear cornering response and can increase the maximum limit of available lateral acceleration. In the transient response, the proposed controller can reduce the yaw rate overshoot by increasing the understeer characteristic. The proposed algorithm has been investigated via computer simulations. In the simulation results, the performance of the proposed controller is compared with uncontrolled cases. The simulation results show that the proposed algorithm can improve the vehicle lateral stability and handling performance.