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2중 Wedge 구조를 이용한 Electro-Mechanical Brake 제동효율 향상
권오석(Oh-Seok Kwon),신동환(Dong-Hwan Shin),김명진(Myoungjin Kim) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
According to the change to the hybrid, fuel cell, electric vehicle, and the demand for the safety and the ecofriendliness, the necessity of Electro-Mechanical Brake(EMB) is raised. The most important issue for realizing EMB is that the required motor power for braking is too large. So the high braking efficiency is required. In recent years, Siemens VDO’s Electronic Wedge Brake(EWB) is noticeable for the high braking efficiency. In this research we propose a new brake mechanism which has higher braking efficiency than Siemens VDO’s EWB. We verify this mathematically and by simulation.
Electro-Wedge Brake의 고장 분류 및 센서 고장 진단
황우현(Woohyun Hwang),허건수(Kunsoo Huh),김명준(Myoungjune Kim),김주곤(Joogon Kim),구본경(Bongyeong Koo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The brake-by-wire units such as EWB (Electro-Wedge Brake) will be used to the next-generation intelligent vehicles because the EWB units are lighter in weights and have faster response compared to conventional hydraulic brake units. EWB unit uses the self-reinforcing wedge principle, the actuation forces and therefore electrical power requirements are much lower than in conventional electromechanical brake system. However, when implementing to the vehicle, the important problem is the reliability of the brake-by-wire units. Because there are no mechanical links between the brake pedal and brakeby-wire actuators, Fault diagnosis is essential in implementing EWB units. In this study, EWB fault diagnosis system is developed for monitoring the brake status based on the analytical redundancy method. A test bench is built including the EWB system and the performance of the proposed fault diagnosis system is demonstrated through the test bench experiment.
김주곤(Joogon Kim),김종기(Jongki Kim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Developing active brake systems such as ABS. TCS and ESC decrease a death rate in vehicle accident. In this paper a new HBS(Hybrid Brake System) which is composed of the hydraulic brake system for front wheel and the EMB(Electro-Mechanical Brake) for rear wheel was introduced. The HBS is an environment-friendly system because it doesn't need any brake oil for rear wheel. In respect of failsafe the HBS has the hydraulic brake system in front wheel as a backup brake. So even in case of failure of rear electro-mechanical brake the HBS can guarantee the basic braking performance. A newly designed electro-mechanical brake installed in rear wheel reduces the required motor power dramatically by transferring the kinetic energy of a vehicle into the braking force. A cascade control that is composed of position control and current control is used in EMB system. In addition this paper also provides a vehicle test result with HBS to show the feasibility of CBS braking performance.
EMB를 이용한 하이브리드 차량의 회생제동 제어로직 개발
정기화(G. H. Jung),김동현(D. H. Kim),안정근(J. G. Ahn),진한별(H. B. Jin),김수병(S. B. Kim),김현수(H. S. Kim),황성호(S. H. Hwang) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, development of regenerative braking control logic for hybrid electric vehicles using electro mechanical braking system. A regenerative braking algorithm is proposed to make the maximum use of the regenerative braking energy for an independent front motor drive parallel HEV. The regenerative braking system are developed using MATLAB, and the regenerative braking performance is investigated by the simulator. Brake-by-wire systems are two concept currently favored, the electro-hydraulic system and the electro-mechanical system. This work focuses on such fully electro-mechanical brake systems, where the brake force is generated directly in the wheel-brake acture. This paper investigates the feasibility of a cascaded PI control architecture for an EMB with the intention of establishing a baseline standard against which the performance of future control schemes may be compared.
EMB(Electro Mechanical Brake) 고장 진단 시스템을 위한 3D 시뮬레이터 개발
강현구(Hyunkoo kang),이동훈(Donghun Lee),허건수(Kunsoo Huh),정지현(Jihyun Jung),김명준(Myungjune Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The trend in automotive industry is to replace hydraulic systems with electronic systems. As EV(Electric Vehicle) was developed, the EMB(Electro Mechanical Brake), which shows better response and control performance, became very important. This paper focuses on modeling of the EMB 3D simulator using simulation and experimental results. The EMB 3D simulator consists of gear box, screw-nut, pad, floating caliper and disk. The input is the motor torque, and output is a brake clamping force. This can be considered as modified caliper, since the caliper stiffness is included. The modeling process was carried out using RecurDyn, a MBD(MultiBody Dynamics) software. The EMB 3D simulator can be used for fault diagnosis of brake control
BBW(Brake-by-wire) 시스템의 Parity space 접근법을 이용한 모델기반 센서 고장진단 알고리즘 개발
황우현(Woohyun Hwang),신재관(Jaekwan Shin),허건수(Kunsoo Huh),정지현(Jihyun Jung),김명준(Myungjune Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The brake-by-wire(BBW) system, which is also called the EMB(Electro-Mechanical Brake) system, has become a promising vehicle braking control scheme. Fault detection and diagnosis becomes increasingly important for the robust BBW system. In this paper, the clamping force sensor fault detection algorithm is proposed with parity equation method for EMB system. At first, modeling of EMB system including PMSM(Permanent-Magnet Synchronous Motor) was carried out. Also, in order to verify the EMB model, the simulation result is compared to EMB test bench result. The model based fault detection algorithm is verified through the closed loop simulation.
EMB의 클램핑력 추정을 위한 옵저버 정량적 평가에 관한 연구
정호영(Hoyoung Jeong),이강석(Kangseok Lee),이우택(Wootaik Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
The research of Electro-mechanical Brake(EMB) which is one of typical Brake-by-Wire system, has been progressed recently because of the of the advantage by regenerative braking and precise controllability. The EMB make the movement of the brake pad by rotation motor, and the clamping force is generated by contact between the brake pad and disk. Additional sensors are required for measuring of the clamping force of EMB, which causes the increase of cost and effort to install the sensors. In this paper, the Luenberger observer which is one of typical linear state estimator and the sliding mode observer are designed Designed state estimators are evaluated quantitatively by mutual comparison on the test bench. It can be possible to estimate the clamping force of EMB without additional sensors by designed Luenberger and sliding mode observer
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.
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.