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인휠 독립구동 차량에 대한 노면 마찰계수 추정 및 TCS 제어 알고리즘 개발
고성연(Sungyeon Ko),고지원(Jiwon Ko),김정욱(Jungwook Kim),이상문(Sangmoon Lee),천재승(Jaeseung Cheon),김현수(Hyunsoo Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In this study, a road friction estimation and TCS control algorithms were proposed for an in-wheel electric vehicle. Road friction estimation algorithm estimates the road friction when the vehicle is running on a slippery road based on the vehicle dynamics and sensor measurements. Furthermore, the proposed method does not used tire characteristic map, so it is robust for change of tire at real vehicle. TCS control algorithm controls each of wheels using in-wheel motor when the vehicle slip on a slippery road. As a result, the vehicle is running on a slippery road safely by using TCS control algorithm. To validate of the proposed road friction estimation and TCS control algorithm, a co-simulator was developed, which combined the vehicle performance simulator based on MATLAB/Simulink and the vehicle model of CarSim.
후륜 인휠 하이브리드 자동차의 회생제동 협조제어 알고리즘 개발
고성연(Sungyeon Ko),고지원(Jiwon Ko),김현수(Hyunsoo Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Co-operative control algorithms for an in-wheel hybrid electric vehicle were proposed for the regenerative braking of the rear in-wheel motors and friction braking of the front and rear wheels. The regenerative braking algorithm (Ⅰ) was developed based on actual brake force curve, which distributes the front and rear braking force linearly and the regenerative braking algorithm (Ⅱ) was developed to increase the regenerative braking energy by control of the rear motor torque at low deceleration regions. To evaluate performance of the proposed control algorithm (Ⅰ) and (Ⅱ), co-simulator was developed, which combined the vehicle performance simulator based on MATLAB/Simulink and the vehicle model of CarSim. It was found from the simulation that the regenerative braking energy of the algorithm (Ⅱ) was much higher than that of the algorithm (Ⅰ).
배터리/슈퍼커패시터 하이브리드 ESU의 상온 및 저온에서의 성능 평가 및 제어 전략 개발
이가은(Gaeun Lee),고성연(Sungyeon Ko),홍승철(Seungchul Hong),안균영(Kyunyoung Ahn),남재도(Jaedo Nam),김현수(Hyunsoo Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In this study, the performance verification of an electric vehicle (EV) with a battery/supercapacitor hybrid energy storage unit (ESU) in room and low temperature was conducted, and a control strategy for the hybrid ESU was proposed. For the battery/supercapacitor hybrid ESU, a control strategy was proposed, which controls the battery power when the battery power demand was greater than the battery power limit, and the insufficient or extra power was managed in the supercapacitor. For the performance verification, simulation was conducted for various temperatures and number of supercapacitors.
전동식 부스터 브레이크를 이용한 병렬형 HEV의 회생제동 협조제어 알고리즘 개발
김정욱(Jungwook Kim),고성연(Sungyeon Ko),이가온(Gaeun Lee),여훈(Hoon Yeo),김필구(Pilgu Kim),김현수(Hyunsoo Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this study, a co-operative regenerative braking control algorithm for the HEV with an electric booster brake was proposed and its performance was evaluated. A dynamic model for the electric booster performance simulator and its performance was investigated. In addition, a dynamic model for the 6-speed AT based hybird vehicle was established to develop a performance simulator, and it was combined with the electric booster brake performance simulator. Considering the electric booster brake structure, a strategy was proposed to distribute the braking force and regenerative braking force using the electric booster brake. A co-operative regenerative braking control algorithm was proposed, wherein the regenerative torque is cut off to ensure ride comfort and maintain the braking force during downshift for braking, and then regenerative torque is controlled considering the electric booster brake response characteristic. The combined performance simulator was used to evaluate the performance of the electric booster brake and the co-operative control algorithm, and the results indicated that the desired braking force was maintained and that the deceleration change decreased.
파워트레인 요소 손실을 고려한 CVT 병렬형 하이브리드 차량 연비 해석 시뮬레이터 개발
손한호(Hanho Son),장미정(Mijeong Jang),고성연(Sungyeon Ko),김동렴(Dongryeom Kim),이지석(Jisuk Lee),김현수(Hyunsoo Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
In this paper, a CVT system model was developed including the shift dynamics and clamping force characteristics to investigate the powertrain components loss for a Parallel-HEV equipped with CVT. The loss model was developed from experimental data considering the line pressure, CVT input speed, input torque, and gear ratio. Using the developed CVT system model, a vehicle performance simulator was constructed. For 505, UDDS and HWFET driving cycle, the CVT loss was analyzed with gear, clutch, etc. It was found that the CVT loss takes the largest part in the powertrain loss except for the driving resistance.