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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.
전륜 EWB 장착 연료전지 자동차의 회생제동 특성 해석
고지원(Jiweon Ko),김정욱(Jungwook Kim),현동윤(Dongyoon Hyun),김현수(Hyunsoo Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, we analyzed the regenerative braking characteristics of a fuel cell electric vehicle (FCEV) equipped with electronic wedge brakes (EWB) on the front wheels. To analyze the regenerative braking characteristics of the FCEV with EWB, a regenerative braking control algorithm was proposed for the regenerative braking and friction braking for front wheels and friction braking for rear wheels, and a powertrain model of an FCEV composed of a motor, fuel cells, and batteries and a MATLAB model of the control algorithm were developed. They were linked to the CarSim-RT (real time) model of the vehicle under study, whereas the braking hardware in the loop simulator (HILS) of the FCEV was built using the EWB hardware. This HILS was used to examine dynamic response of the regenerative motor torque and the EWB clamping force corresponding to the driver’s braking demand.
전자제동시스템의 실차 기반 제동 안전 및 신뢰성 평가 절차 개발
전광기(Kwangki Jeon),유용호(Yongho Yoo),최성진(Sungjin Choi),김인수(Insu Kim),정종윤(JongYoon Jeong),현동윤(Dongyoon Hyun) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
The key technology which can enlarge the energy efficiency in green cars such as HEV, FCEV and pure EV 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 safety and 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 evaluation and verification test procedure is not sufficient yet regarding to the electronic brake system. The brake safety and reliability evaluation test procedure with an electronic brake system was proposed in this study.
그린카용 Brake-by-Wire 시스템의 EMB 엑추에이터 개발
김주곤(JooGon Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
From now on, most active brake systems are based on hydraulic system. A new electromechanical brake system which can be used of ABS/ESC control actuator is proposed in this paper. The proposed system can be applied in the rear wheel control actuator of both HBS(hybrid brake system) and 4W EMB System. The proposed system is a new electronic braking control system for the sake of vehicle stability using BLAC motor. Rig tests are performed for the feasibility of the proposed EMB actuator. To show the results of ABS, ESC braking feasibility, various kinds of vehicle tests were accomplished. ABS test results of straight braking and ESC test results of circle cornering in ice and snow road are obtained in vehicle tests. Those results show good performance in vehicle braking stability comparing to the ABS/ESC results of the hydraulic system. From this research, we have obtained core technologies to develop the ABS/ESC logic of rear EMB system which can be applied to BBW system in advanced vehicles such as hybrid vehicles, fuel cell vehicles, and electrical vehicles.
전륜 EWB 장착 연료전지 자동차의 제동감 유지를 위한 회생제동 제어 알고리즘 개발
고지원(Jiweon Ko),김정욱(Jungwook Kim),이가은(Gaeun Lee),현동윤(Dongyoon Hyun),김현수(Hyunsoo Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this study, we proposed regenerative braking control algorithm of a fuel cell electric vehicle (FCEV) equipped with electronic wedge brakes (EWB) on the front wheels, for maintaining braking force and braking feeling when regenerative braking of a vehicle and friction braking crossed each other. The regenerative braking algorithm was developed with weight factor considering gap control of EWB, vehicle speed, and response speed of EWB. We constructed hardware in the loop simulator (HILS) system comprised of EWB hardware and FCEV simulator. Using the HILS, performance of the regenerative braking control algorithm was investigated when the regenerative braking and friction braking intersected each other. As a result of HILS, a sharp change of deceleration decreased in braking intersection part by the proposed regenerative control algorithm, therefore braking feeling and braking force were maintained.
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.
그린카용 Brake-by-Wire 시스템의 ECU 개발
김주곤(JooGon Kim),김명준(MyoungJune Kim),전재형(JaeHyung Chun),구본경(BonGyeong Koo),허재호(Jaeho Hur),손영창(YC Son) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
New ECU’s of EMB/EWB system which can be used for ABS/ESC/EPB controller are proposed in this paper. The proposed ECU’s can be applied in the rear wheel control actuator of both HBS System and BbW System. The proposed drive ECU is a new electronic braking controller for the sake of vehicle stability using BLAC motor and the developed central ECU is a new electronic central braking controller of HBS System or BbW System. To show the results of the proposed ECU’s, various kinds of vehicle tests were accomplished. From this research, we have obtained core technologies to develop both the drive ECU of front/rear EMB system and the central ECU which can be applied to BBW system in advanced vehicles such as hybrid vehicles, fuel cell vehicles, and electrical vehicles.
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.
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.