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비 구형 기어를 이용한 자기강화 브레이크 시스템의 강인제어 로직 개발
박희람(Heeram Park),최세범(Seibum Choi),김주곤(Joogon Kim),김명준(Myoungjune Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Simens VDO, German electronic and mechatronic developer announced an innovative braking device called Electronic Wedge Brake (EWB). It uses self-energizing effect, so it is the most energy-effective braking device among Brakeby-Wire systems which is compatible with existing 12 Volts system. A new type of EWB which is called Electronic Noncircular Gear Brake was developed by S. Kim and S. Choi. This brake system has the possibility applying variable wedge angle to system by using noncircular gears. But, as the brake also uses self energizing effect, it is very sensitive to parametric variance. For this reason adaptive controller was developed by Y. Hwang and S. Kim. In this research, the performance of previous adaptive controller is discussed. Based on the previous work, a modified adaption algorithm is proposed and verified by numerical simulation.
비 구형 기어를 이용한 자기강화 브레이크 시스템의 적응제어
박희람(Heeram Park),최세범(Seibum Choi),최성진(Sungjin Choi),전광기(Kwangki Jeon),황현수(Hyun-Soo Hwang) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Simens VDO, German electronic and mechatronic developer announced an innovative braking device called Electronic Wedge Brake (EWB). It is the most energy-effective braking device among Brake-by-Wire systems because it uses self-energizing effect. Electronic Noncircular Gear Brake (ENGB) is a new type of EWB which uses noncircular gears instead of wedge. However it is almost identical with EWB. As the brake also uses self energizing effect, it is very sensitive to parametric variance such as brake pad friction and motor resistance. In this paper, the adaptive control algorithm which is robust to parametric uncertainty is proposed. Based on the previous work, the algorithm is verified by numerical simulation.
파라미터 변화에 따른 전자 브레이크 시스템의 민감도에 대한 연구
박희람(Heeram Park),최세범(Seibum Choi),최성진(Sungjin Choi),전광기(Kwanki Jeon),황현수(Hyunsoo Hwang) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper is focused on the output sensitivity of electronic brake system due to the parameter variation. The mathematical models of electro-mechanical brake system and electronic wedge brake system are introduced. Using MATLAB Simulink, the performance change of each system caused by parameter variation are verified.
실차 테스트를 통한 농용 트랙터의 운용 조건에 대한 변속 제어 보상 알고리즘 개발
김용래 ( Yongrae Kim ),박희람 ( Heeram Park ),신옥식 ( Okshik Shin ),유지훈 ( Jihun Yu ),정년기 ( Nyunki Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2
농용 트랙터는 다양한 농작업에 활용되며, 이에 따라 잦은 변속과 방향 전환이 필요하다. 이러한 사용자 편의에 따라 선호하는 변속기의 경향도 점차 변화 중이다. 이전까지 주로 기계식 변속기가 적용된 트랙터가 일반적으로 사용되었다면, 현재는 클러치로 주행 방향을 결정짓는 반자동 변속기의 활용도가 높아졌다. 특히 클러치를 통한 변속 시 셔틀 레버로 사용자 임의로 전진 및 후진 주행을 자유롭게 할 수 있으며, 이를 통한 작업의 효율 개선도 기대된다. 하지만 이와 같은 작업이 원활하게 되기 위해서는 운용 조건과 적절한 클러치 제어가 필수적이다. 이러한 부분이 미비할 시 변속 충격 및 반응성 낮음 등 이상 거동이 발생될 수 있으며, 이는 작업 효율 하락으로 이어진다. 본 연구에서는 클러치로 변속이 가능한 트랙터에서 운용 조건에 따라 비례제어밸브와 클러치의 제어 특성 연구를 실차 테스트 기반으로 수행하였다. 클러치 제어에 따른 차량 거동을 단품이 아닌 실차 조건에서 수행하였으며, 운용 조건에 따라 동일한 제어 시 차량 거동 특성에 미치는 영향을 분석하였다.
전자 브레이크를 적용한 연료전지자동차 회생제동 시스템의 신뢰성 평가기술 개발 PART-(2)
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),양동호(Dongho Yang),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The demand of the green car like hybrid electric vehicle, fuel cell electric vehicle(FCEV) and pure electric vehicle have risen dramatically. The key technology is the regenerative braking in the energy saving technology. And electronic brake has been developed along with the advance of the electronic control technology. The reliability about the braking system is very important because the braking system is concerned with safety of vehicle. But the regulation is not sufficient enough. In this study, to develop the reliability assessment technology FCEV model with regenerative braking system and electronic braking system(EWB, EMB) was developed. The reliability assessment scenarios about regenerative braking system and electronic braking system is developed using ABS brake regulations and FMEA results. This scenarios ware applied to the performance simulation of the FCEV with the regenerative braking and the electronic braking system. And the fail-safe control strategy of a EMB was suggested and verified.
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.
회생제동 및 EWB/EMB 시스템 신뢰성 평가용 Test Bench 개발
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),최정훈(Junghoon Choi),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The key technology which can enlarge the energy efficiency in green cars such as hybrid electric vehicle, fuel cell electric vehicle and pure electric vehicle is the regenerative braking. Electronic brake systems which can be easily controlled with the regenerative brake system have been developed along with the advance of the electronic control technology. The reliability of the electronic braking system is very important because the braking system is concerned with the safety of vehicle directly and the functional safety of the electronic braking system is becoming the important issue due to the ISO 26262. But the test standard is not sufficient yet, so the researches to make a new test standard regarding to the electronic brake system and regenerative braking system are increasing. The design of test bench to test reliability and performance of electronic brake system as well as regenerative brake system was proposed in this study.