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실험계획법을 이용한 AMT 발진 제어기 파라미터 강건 설계
김영광(Young Kwang Kim),엄현우(Hyun Woo Uhm),남광수(Kwang Soo Nam) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
A Two Degrees-of-freedom PID controller for dry clutch launch control is proposed in this paper. A simulation of dynamic drivetrain model based on Design of Experiment is executed by selecting adequate output responses which quantify control parameter, feeling of gear shift and shifting time. This process proves that determining parameters of PID controller by DOE enables to increase robustness of controller than determining parameters of PID controller by eidetic method comparing S/N ratio of each method.
차량 조종 안정성 향상을 위한 MDPS 제어 알고리즘 개발
고상진(Sang-Jin Ko),오세욱(Se-Wook Oh),구은경(Eun-Kyung Gu),남광수(Kwang-Soo Nam) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, we suggest new control algorithms of motor driven power steering (MDPS) system to improve steering maneuverability. Conventional MDPS system supports a driver to steer easily through an electric motor. Therefore, it is possible to stabilize vehicle movement by applying additional control algorithms to conventional MDPS system without any other equipment. Proposed control algorithms allow MDPS system to distinguish vehicle state independently without other systems, such as electronic stability control (ESC) system and stabilize vehicle movement through additional torque. Proposed algorithms consist of three algorithms - road surface detection algorithm, handling compensation algorithm and yaw compensation algorithm. First, road surface detection algorithm is to distinguish road surface through estimated alignment torque and to calculate surface index (SI) as a new vehicle state. SI is obtained by difference between of reference alignment torque on high-μroad and on driving road. Handling compensation algorithm and yaw compensation algorithm generate additional torque, which make vehicle movement more stable, using SI. Handling compensation algorithm functions to improve steering maneuver in a nonlinear region where the alignment torque is saturated and prevent over and under steering. yaw compensation algorithm enables to return a steering wheel more rapidly and improve yaw stability. We have implemented this algorithm in ECU of MDPS system and conducted an actual vehicle test to verify performances of proposed control algorithms. Test results were compared with test results of conventional MDPS system and it proves vehicle stability improvement of proposed control algorithms.
산성광산배수 (AMD) 처리 부산물 ochre의 특성과 활용
정중환(Jung-Hwan Jeong),김호진(Ho-Jin Kim),김영남(Young-Nam Kim),남광수(Kwang-Soo Nam),김계훈(Kye-Hoon Kim) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.3
This study was carried out to find out potential use of ochre as an agent to reduce phosphorus content in water. Ochre is a by-product from treatment of acid mine drainage (AMD) which is composed mostly of Fe₂O₃, Fe₂O₃ ? H₂O, FeO ? OH and Fe(OH)₃. Three ochre samples (ochre-H, ochre-D and ochre-S) were collected from three treatment facilities in Gangwon province. Physico-chemical characteristics of three ochre samples including pH, electrical conductivity, total phosphorus, available phosphorus, particle size distribution were analyzed. Scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis were also carried out. In addition, experiments for phosphorus removal from water was performed. Calcium content of ochre-H was higher than that of ochre-D and ochre-S, whereas iron content of ochre-H was lower than that of ochre-D and ochre-S. All the phosphorus in water up to maximum 191,411 mg kg<SUP>-1</SUP> per unit mass of ochre was removed with ochre-H. Ochre has immense potential as an agent to reduce phosphorus content in water.