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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.
자동차 임베디드 시스템 스프트웨어 품질보증 체계 개발에 관한 연구
김명준(Myoungjune Kim),두민수(Minsoo Doo),김용웅(Yongwoong Kim),서성구(Seonggu Seo),권순익(Soonik Kwon) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Because the use of software in automotive industries is growing constantly as vehicles are rapidly getting more complicated to adopt advanced technologies and supplementary functions, the quality of software has been a critical factor for the quality of automotive parts, and the vehicle also. But owing to the nature of software, the software quality assurance system should be different from that of hardware, and usually based on the quality models like ISO-9001, CMMI, or SPICE, which was developed for software. We have developed the CMM Level2 based standard software process, MSDP consists of planning, requirements management, process tracking, quality assurance and so on and implemented it to development, testing, and maintenance of chassis control systems like ESP, CDC, MOPS and others. We could reduce much more defects in the earlier development phase than before by complying the newly made standard process and auditing the software related activities with quality assurance system. Furthermore, we are continuously revising the standard process to be more effective for quality control and to be CMMI Level3 compliant.
김명준(Myoungjune Kim),정지현(JiHyun Jung),전재형(JaeHyung Chun),김주곤(JooGon Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Mando is developing Hybrid Brake System that uses hydraulic brakes for front wheels and electromechanical brakes(EMB) for rear wheels as an intermediate step toward 4wheel brake by wire system. To make electromechanical brakes which have better performance such as response time than conventional hydraulic brakes with similar level of brake force and reliability, controlling of motor that drives electromechanical brakes is most important. This paper investigates the feasibility of several control methods for an EMB motor to acquire faster braking response in normal braking, quicker response of slip control and bigger braking force in ABS braking, and lower residual drag. This approach would be more useful for an EMB system which doesn’t have any device to measure braking force and could be applied to 4wheel brake by wire system easily. Test results with a test vehicle are presented to verify proposed control methods.
김주곤(JooGon Kim),김명준(MyoungJune Kim),전재형(JaeHyung Chun),김광일(KwangIl Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Recently, active brake systems such as ABS/ESC become generalized in medium and luxury passenger car. While most active brake systems are based on hydraulic system, Newly proposed ABS/ESC controls based on electronic brake system are applied in the rear wheel control of hybrid brake system. The proposed method is a new electronic braking control method for the sake of vehicle stability using BLAC motor. Important information of hybrid brake control system is transferred through CAN network. Sensor information of ABS/ESC is processed in front wheel hydraulic ECU and motor control is processed in rear wheel EMB ECU. ABS/ESC control in HBS is composed of two parts. In front part, sensing of yaw, steering angle, wheel speed and brake pedal travel, decision making of ABS/ESC and hydraulic operations are performed. And sensing of motor position and current and motor control of two rear wheels are performed in rear part. To show the results of CBS, ABS, ESC, EPB braking feasibility, various kinds of vehicle tests were accomplished. Those results show good performance in vehicle braking stability and convenience.
Fault Tree Analysis를 통한 EMB 고장의 분류 및 EMB의 고장 검출 알고리즘 개발
김인근(Inkeun Kim),한광진(Kwangjin Han),허건수(Kunsoo Huh),김명준(Myoungjune Kim),김주곤(Joogon Kim),구본경(Bongyeong Koo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Barke-by-Wire systems are lighter in weight, faster in response, easier to implement than the conventional brake systems. Because brake systems are directly related to passengers’ life, guarantee of system’s robustness are essential for implementation. In order to ensure the reliability of the Electro-Mechanical Brake(EMB), a robust dry-type BBW controller should be designed. In this study, a fault detection algorithm is designed based on classified faults. Fault Tree Analysis is used to show how the faults are occurred and how their causes are related to the basic events. In order to detect the rotor faults, magnetic flux leakage are estimated using the estimation algorithm. By choosing a proper threshold, it is shown that rotor fault can be detected.
윤활상태에 따른 Electro-Mechanical Brake의 Clamping Force 추정
최정호(Jeongho Choi),김인근(Inkeun Kim),허건수(Kunsoo Huh),김명준(Myoungjune Kim),김주곤(Joogon Kim),김광일(Kwangil Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Brake-by-wire systems have several advantages compared to conventional hydraulic brake systems. They are environmentally-friendly because they do not need brake fluid. EMB (Electro-Mechanical Brake) is a type of Brake-by-wire system and it generates clamping force utilizing the electric motor. Since EMB has fast response, it is suitable for modern electronic brake control systems such as ABS (Anti-lock Brake System), TCS (Traction Control System), ESC(Electronic Stability Control) etc. Brake-by-wire systems need accurate information of the clamping force for controlling the brake force. However, it is difficult to install the sensor for measuring the clamping force due to cost and maintenance problems. In this study, an algorithm to estimate the clamping force is developed based on electrical and mechanical models of EMB. Nonlinearities of the EMB such as friction are considered to accommodate various lubrication conditions. The proposed algorithm is verified experimentally with the test bench.
김희진(Heejin Kim),김대일(Daeil Kim),최규호(Gyuho Choe),박용문(Yongmun Park),구현우(Hyounwoo Koo),김명준(Myoungjun Kim) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.6
Recent research on the requirement of 3D point clouds with very high density and accuracy is necessitates development of hardware system to capture a set of 3D point clouds of such a quality. Main issues include the accuracy of the captured points and the performance of computation. We propose a system that captures a set of 3D points with high accuracy and high speed. This is possible based on the calibration of the projector-camera system and the turn-table on which any object is placed and turned around. We show that there exists a geometric transformation between the camera and the turn-table, and as soon as we obtain the transformation from our calibration process, the registration of the point sets captured at multiple times may be done very quickly, through a one dimensional search.
다물체 동역학기반 BBW 시스템 적용 차량동역학 해석모델 개발
김도현(Dohyun Kim),노기한(Kihan Noh),최형진(Hyeongjin Choi),김명준(Myoungjune Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
본 연구에서는 BBW 시스템의 핵심부품인 전ㆍ후륜 EMB의 단품 해석모델을 개발하고, 이를 적용한 전차량 해석모델을 개발하였다. EMB 단품 해석모델은 다물체동역학 해석 S/W인 ADAMS를 이용하여 개발하였으며, 마찰이 없는 이상적인 상태에서의 이론적인 계산결과와 비교를 통해 모델의 구성을 검증하고, 실제 H/W의 Dynamometer 시험결과와 비교를 통해 최종 모델의 적합성을 검증하였다. 또한 개발된 전ㆍ후륜 EMB 해석모델을 전차량 해석모델에 적용하였으며, 주행시 제동 시뮬레이션을 수행하여 EMB 시스템의 제동 성능을 분석하였다.