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조범래(Bumrae Cho),정지현(Myo),김명준(MyoungJune Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
BBW system can be used for CBS/ABS in this paper. The proposed BBW can be applied in 4W EMB which is Front/Rear EMB actuator. The proposed BBW system has 3 part advantages such as environment friendly, control and packaging. The proposed BBW system is controlled by EMB typical pedal to compare hydraulic brake system. From this research, we have obtained BBW CBS and ABS feasibility.
조범래(Bumrae Cho),김명준(Myoungjune Kim) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
EMB (Electro-Mechanical Brake) is an integrated brake module of CBS (Conventional brake system) and active brake (ABS, ESC, Value added) functions. EMB is consist of PMSM which generates braking torque and ball screw which is used to translate rotary motion from PMSM to axial motion of caliper cylinder. The development objective of EMB simulator model is validation of EMB braking control algorithms feasibility. EMB simulator enables to test vehicle braking performance according to properties of EMB HW in the MATLAB/Simulink environment. Therefore, A EMB simulator system is composed of vehicle model, EMB HW model and SW model. A vehicle model by using CarSim simulates the performance of vehicles in response to driver braking control. EMB HW model by using system identification is built by mathematical models from measure data. It is a simulation validated by comparing simulation results with vehicle test results.
ZTA 제조시 알루미나 입자크기가 치밀화 거동에 미치는 영향
채지훈,조범래,Chae, Jihoon,Cho, Bumrae 한국재료학회 2013 한국재료학회지 Vol.23 No.4
In order to increase the toughness of ZTA(zirconia toughened alumina) ceramics, the present study focused on rearrangement and densification of particles according to the particle size of the parent material. When rough alumina was used for production of ZTA, densification behavior was observed in the specimen sintered at a temperature over $1550^{\circ}C$. However, it was found that the densification behavior was occurred in the specimen sintered at $1450^{\circ}C$ when fine alumina powder was used. High relative density exceeding 98% was obtained when fine alumina powder was mixed with 15 wt% of 3Y-TZP and sintered at $1600^{\circ}C$. Also, a hardness of 1820.2 Hv was obtained when a specimen containing 10 wt% of 3Y-TZP was sintered at $1600^{\circ}C$. In the case of 3Y-TZP containing rough alumina powder that had been sintered the hardness value was around 1720.3 Hv. It was predicted that an improved toughening effect in ZTA could be achieved by using finer alumina powder as the parent material.
진동과 CAN 데이터를 통한 차량 브레이크 패드의 상태 진단 모델 연구와 차량 예지보전에 대한 고찰
유병욱(Byungwook Yoo),오명근(Myunggeun Oh),박승영(Seungyoung Park),조범래(Bumrae Cho) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5
자율주행 그리고 차량공유 시대의 도래로 자동차 PdM의 필요가 부상하고 있다. 하지만 이제껏 PdM이 적용된 다른 산업들과는 다르게, 자동차의 주변환경은 변화의 폭이 크고 고사양의 데이터 수집 인프라를 활용하기 어렵다. 본 논문은 현시점 자동차의 주요 구성요소 중 데이터 취득 및 분석이 가장 용이한 브레이크 패드를 연구하여, AI에 의한 차량 상태 모니터링과 건전성 예측의 가능성을 검토한다. 브레이크 패드의 동역학에 관련된 CAN 데이터, 그리고 차량에 가속도센서를 장착하여 수집한 제동 시의 0~250Hz 대역 진동 3축 성분 STFT 값을 학습 데이터로 사용했다. 모델은 LGBM, XGBoost, 딥러닝 기법을 조합하여 앙상블 학습했다.