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Jeon, Kwangki,Park, Ji In,Choi, Sungjin,Yi, Kyongsu Professional Engineering Publishing Ltd 2014 Proceedings of the Institution of Mechanical Engin Vol. No.
<P>An electronic brake safety evaluation index is proposed as a quantitative analysis metric for evaluating the fail-safe control strategies of brake-by-wire systems for improvement in the straight braking stability. The proposed electronic brake safety evaluation index is developed with the combination of a longitudinal deceleration deviation term and a lateral deviation term of a vehicle in straight braking situations. A fuel cell electric vehicle with a brake-by-wire system model is used to simulate the effectiveness of the electronic brake safety evaluation index in various failure modes. Brake safety evaluation scenarios are proposed to find effective fail-safe control strategies for the brake-by-wire systems. The simulation results for the fail-safe control strategies of a brake-by-wire system in various failure modes show that the proposed electronic brake safety evaluation index can be a useful and effective quantitative metric for evaluating fail-safe control strategies in the development, verification and validation stages of brake-by-wire systems.</P>
전자 브레이크를 적용한 연료전지자동차 회생제동 시스템의 신뢰성 평가기술 개발 PART-(1)
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),양동호(Dongho Yang),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The demand of the green car such as hybrid electric vehicle, fuel cell electric vehicle and pure electric eehicle has been rising dramatically. The key part is the regenerative braking system in the energy saving technology of gren car. And electronic braking system has been developed along with the advance of the electronic control technology. The reliability about the electronic braking system is very important because it is concerned with the safety of vehicle. But the regulation of the reliability assessment test for the regenerative braking and electronic braking system is not sufficient enough. In this paper, FCEV with regenerative braking system and electronic braking system(EWB, EMB) has been modeled to develop the reliability assessment technology. With a lot of ABS brake regulations and FMEA results about the regenerative braking system and electronic braking system, the reliability assessment scenarios have been developed. This scenarios have been applied to the performance simulation and it is shown effective to evaluate the reliability of green car regenerative braking with electronic braking system.
배터리 교환식 전기 버스용 휠 모터 구동 시스템의 해석 모델 개발
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),김덕진(Deokjin Kim),이춘범(Chunbeom Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The city buses with diesel engines are the significant air pollution source in a big downtown. There are a lot of efforts to replace the city bus driven by diesel engine with the clean bus driven by CNG(Compressed natural gas) or alternative energies like an electric power. In this study, the analysis model about a exchangeable battery electric bus driven by wheel-motor system was developed. And an electric energy capacity required by electric bus was examined. The developed analysis model will be effective to discuss the durability and the reliability about fault affects.
전광기(Kwangki Jeon),최성진(Sungjin Choi),고웅희(Woonghee Ko),박정원(Jeongwon Park) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Cornering maneuvers with reduced body roll and without losses in comfort are heading the wish list of car manufacturers. In addition to this, driving safety can be improved considerably with Active Roll Control(ARC) systems. The ARC system can control body roll angle by using DC motor actuators installed in the center of front and rear stabilizer bars. Full vehicle analysis models have been developed using an ADAMS/Car and a CarSim S/W, and these vehicle models have been validated using vehicle test. The ARC controller has been evaluated with two kinds of control algorithm. One has been designed using a slide mode control law based on a roll model and the other has been designed using a estimated lateral acceleration and target roll angle map data. Co-simulations have been conducted by using the Matlab simulink and the validated CarSim vehicle model to evaluate the performance of the ARC control algorithms. From the simulation results, it is shown that the proposed ARC control system can provide with improved vehicle comfort.
SUV 차량용 능동 롤 제어 알고리즘 개발 및 실차 성능 평가
전광기(Kwangki Jeon),황현수(Hyun-Soo Hwang),고웅희(Woonghee Ko),최성진(Sungjin Choi),김준태(Joontae Kim),장기원(Kiwon Jang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Cornering maneuvers with reduced body roll and without loss in comfort are heading requirements of car manufacturers. ARC system can control body roll angle by using motor actuators installed in the center of front and rear stabilizer bars. The full vehicle analysis model developed using a CarSim S/W has been validated using vehicle test data. The ARC controller has been designed using an estimated lateral acceleration and target roll angle map data. Co-simulations with the Matlab simulink controller model and the CarSim vehicle model have been conducted to evaluate the performance of the ARC control algorithm. In order to evaluate the ARC performance in a real vehicle, vehicle tests have been conducted in a KATECH proving ground using the small SUV installed two ARC actuators, controller and a few subsystems. From the simulation and vehicle test results, it is shown that the proposed ARC control algorithm and the developed ARC system can improve vehicle comfort.
SUV 차량용 전동식 능동 롤 제어 시스템의 성능 평가 기술 연구
전광기(Kwangki Jeon),최성진(Sungjin Choi),김준태(Joontae Kim),이경수(Kyongsu Yi) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.11
차량 선회 시 조종안정성과 주행 승차감을 향상시키기 위하여 능동적으로 차체의 롤(roll)을 줄이기 위한 연구가 진행되고 있다. 전동식 능동 롤 제어(ARC) 시스템은 전후 스테빌라이저바 중앙에 위치한 전동 모터 방식의 구동기에 의해 차량의 차체 롤을 제어한다. 본 연구에서는 이러한 전동식 ARC 시스템의 제어 성능 및 차량 동역학적 특성을 평가하고 검증하기 위한 해석, 벤치 시험, 실차 시험의 3단계 절차와 방법을 제안하였다. ARC 제어로직의 성능 및 타당성 평가를 위한 Matlab/Simulink와 CarSim간의 연동-해석 방법을 제안하였고, ARC 구동기 및 시스템의 성능을 평가하기 위한 벤치 시험 방법과 실차 시험 방법을 제안하였다. Cornering maneuvers with reduced body roll and without comfort loss are important requirements for car manufacturers. An electric active roll control(ARC) system controls the body roll angle by using motor-driven actuators installed at the centers of the front and rear stabilizer bars. Co-simulation using the Matlab/Simulink controller model and the CarSim vehicle model was proposed to evaluate the performance of the ARC control algorithm. To validate the performance of the ARC actuator and system, bench tests and vehicle tests were proposed.
GPS를 이용한 차량 전복 경고 및 자동제어 시스템 알고리즘 개발
전광기(Kwangki Jeon),최성진(Sungjin Choi),신동현(Donghyun Shin),이백행(Baekhaeng Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, a system algorithm to warn vehicle rollover and implement auto-braking system by using GPS(Global Positioning System) is proposed. This system can give a driver warning the presence of sharp curve and vehicle rollover possibility by using GPS data and digital geographic road information data in advance. Additionally this system can communicate with ESP(Electronic Stability Program) to reduce the speed of a vehicle automatically in case of need. ADAMS vehicle simulation is used to verify the critical speed and safe speed of the curves to be expressed by both curvature and road friction. The rollover warning and auto-braking system can give drivers safe driving circumstance and be effective for the prevention of vehicle rollover accidents.
타이어 Wet Grip Index와 실차 제동거리와의 상관성 연구
전광기(Kwangki Jeon),김봉수(Bongsoo Kim),신영동(Young-Dong Shin),유용호(Yongho Yoo),정도현(Dohyun Jung) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
There is a growing interest in the wet grip test method with regard to tire energy efficiency rating regulation. In this study, tire wet grip index results using two test methods are analysed and then the correlation between tire wet grip index and 100kph vehicle wet braking distance is analysed. From the test results, it is shown that two tire wet grip index results are very close and there is strong correlation between tire wet grip index and 100kph vehicle wet braking distance