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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.
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.
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.
An Assessment Protocol on Accessibility of Smart-Home Environment for People with Disability
( Jeonghyun Kim ),( Jongbae Kim ),( Myoungjun Lim ),( Hyosoon Kwon ),( Heesuk Lee ),( Kyungsun Pyo ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
A Quality of Life Technology (QoLT) research team at NRRI design and build a QoLT testbed for assessing QoLT products, i.e., highly advanced assistive devices, and prescribing appropriate living environment for the individuals with disability. The QoLT testbed is possible by Focus Group`s participation in user needs analysis, design, and building of the testbed. To design effective and efficient method of prescription and delivery of appropriate independent living environment for the individuals with disability, the QoLT team at NRRI designs a tentative assessment protocol focused on performance and satisfaction, parts of accessibility and usability, and evaluate the tentative protocol for seven months. The tentative assessment protocol for accessibility and usability of assistive devices in testbed environment for independent living of individuals with disability including Spinal Cord Injury (SCI) is designed and verified with outcomes of 15 cases. The tentative assessment protocol is designed by referring Canadian Occupational Performance Measurement (COPM) with ten scale-based scoring and performed by an Occupational Therapist. The 15 subjects are 10 individuals with SCI - seven cervical spinal cord injury, two thoracic spinal cord injury, one lumbar spinal cord injury - and five individuals with stroke - three individuals with left hemiplegia and two individuals with right hemiplegia. 15 subjects are taken surveys before and after living in the testbed from one week up to four weeks, which is a part of the tentative assessment protocol.
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.
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.
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.
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.