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텔레매틱스를 위한 차량과 기지국간 양방향 통신환경 구현
지용관(yongkwan Ji),강문원(Moonwon Kang),허건수(Kunsoo Huh),조동일(Dong-il Cho),박장현(Jahng-Hyon Park) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In present telematics services, GPS receivers and navigation systems using existing telecommunication network are operated only as a simple unilateral service i.e. a self localization of the vehicle, traffic report and a neighborhood information which is only provided from a base station. For an advanced driver-friendly and active-safety system, however, much more information should be transmitted between vehicles and the central information provider. This information is possibly status of the vehicles and road, or driver's condition, which is determined by sensing and monitoring all contexts, etc. For an introductory step, this paper presents a bilateral data telecommunication module between the vehicle and the base station using RF modules and Micro-controllers. This system adopted a real time operating system for stability and reliability of data communication, and was implemented in small sized module for supporting easy installation and maintenance, and prospective expansion into the mobile base station. An experiment showed the possibility and effectiveness of the proposed implementation in practical application.
차량간 실시간 양방향 통신을 이용한 충돌 예측 알고리듬 개발
이영진(Youngjin Yee),지용관(YongKwan Ji),허건수(Kunsoo Huh),조동일(Dong-il),박장현(Jahng-Hyon Park) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In present telematics services, GPS receivers and navigation systems using existing telecommunication network are operated only as a simple unilateral service i.e. a self localization of the vehicle, traffic report and neighborhood information which is only provided from a base station. For an advanced driver-friendly and active-safety system, however, much more information should be transmitted between vehicle and another vehicle. This information is possibly status of the vehicles and road, or driver's condition, or surrounding information, which is determined by sensing and monitoring all contexts, etc. This system adopted event based communication system for stability and reliability of data communication, and event holding time replaced vehicle safety driving time. This system estimated safety driving time when irregularly information occurs. This system was composed by collision warning/avoidance system. Especially, safety driving time was determined by vehicle relative position and another vehicle information which are rapid turning and acceleration. This main purpose is to provide the driver adequate warning message in advance in order to avoid the possible collision. A system demonstrator is developed in order to get a test bench for collision risk assessment algorithms evaluation.
해석적 중복을 이용한 Steer-by-Wire 시스템의 감지기에 대한 이상진단 기법
문승욱(SeungWuk Moon),지용관(YongKwan Ji),허건수(Kunsoo Huh),조동일(Dong-il "Dan" Cho),박장현(Jhang-Hyon Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
This paper proposes an analytical redundancy technique for fault diagnostics of the sensor in steer-by-wire system. We use incorporating vehicle dynamics modeling into the design of a diagnostic system for steer-by-wire system. The use of a model of vehicle dynamics improves the speed and accuracy of the diagnoses. The proposed fault diagnostics algorithm is based on parity-space methods to generate residuals. To reduce the effects of modeling uncertainty and dynamic transients, the residuals are subject to filtering. We construct diagnostic system consisting residual threshold for detection and isolator with using the directional residual vector.
지능형 교통시스템을 위한 분산형 기지국의 최적경로 탐색 알고리즘
윤장열(Jangyeol Yoon),지용관(YongKwan Ji),허건수(Kunsoo Huh),조동일(Dong-il "Dan" Cho),박장현(Jhang-Hyon Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
In current ITS(Intelligent Transportation System), most route guidance services use cellularphone, PDA and navigation kit. Since these systems are depend on unilateral telecommunication, they guide almost drivers with same route. And it may cause traffic jam. Therefore, telecommunication system which can telecommunicate between vehicle and base station bilaterally and algorithm which is able to divide traffic flow are necessary to realize the efficient route guidance system.<br/> This paper introduces bilateral telecommunication system and proposes indexes such as 'Driving capability' and 'Route difficulty' to improve the performance of route guidance system. We can divide traffic flow by setting up the initial route individually based on driving capability and route difficulty in this system. If there is a traffic jam in the initial route, we can modify the route in local area temporarily by route modification algorithm. Therefore, we can realize the efficient route guidance system using above methods. The simulation results presented in this paper verify the proposed method.
조향 충돌회피경로 판단을 이용한 적응형 AEB제어로직 설계
김재윤(JaeYoon Kim),지용관(Yongkwan Ji),조환성(Hwansung Jo) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
This paper presents a Autonomous Emergency Braking(AEB) system using additional adjacent path target monitoring scheme for performance enhancement. For AEB system performance enhancement in mid-high speed region(>60kph in relative speed), Braking-TTC(Time to Collision)-Elevation tuning with conventional single target monitoring concept can lead sensitive or false activation of AEB braking. In this paper we propose advanced scheme of AEB using additional targets adjacent to driving path of subject vehicle. Using decision concept of subject vehicle’s steerable path for targets in adjacent path can elaborate collision avoidable speed or collision speed of AEB system in mid-high speed region, in case there were not enough steerable path for collision avoidance. Based on that scheme,we designed adaptive AEB control logic and validate its functionality with the postulated scenarios. The result shows that different AEB activation result along to the each scenario in simulation and real vehicle test and thay are written in experiment result section.