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이종일,태범석 ( Jongil Lee,Beomseok Tae ) 한국공업화학회 1996 공업화학 Vol.7 No.3
불소계 계면활성제 및 정밀화학제품의 precursor로 널리 쓰이는 n-perfluorooctanesulfonyl fluoride(n-PFOSF)를 전해불소화 반응으로 제조하는 과정에서 전극 및 반응물의 분극특성의 조사와 불소발생 전위를 측정하였다. 그리고 회분식 전해반응기를 사용하여 정전위법으로 전해반응을 실시하고 반응 종료후 전극과 생성물을 GC, GC/MS, IR 등으로 분석하여 반응과정에 대한 기초자료를 얻으려 하였다. 불소기체의 생성전위는 침적전위 붕괴곡선으로 부터 약 2.8V(vs. Cu/CuF₂)로 보이며 니켈불화물이 덮힌 상태의 전극에서 불소화반응이 진행된다. 회분식 반응기에서 정전위법에 의한 전해불소화 반응은 초기의 전기화학 반응과 후반의 화학반응의 두 단계로 구분된다. 생성물은 전극에 부여된 전위가 낮을수록 적게 생성되며 7V(vs. Cu/CuF₂) 이상 반응물의 무게비로 약 100% 정도를 유지하며 일정해지며 생성물의 분포도 7V(vs. Cu/CuF₂) 이상에서 부터 PFOSF의 생성율이 일정해진다. Synthesis of n-perfluorooctanesulfonyl fluoride(n-PFOSF), which is valuable precursor perfluoro-chemicals, was studied by electrochemical fluorination(ECF). Of prime concern was to investigate the cyclic voltamograms of Ni electrode in anhydrous hydrogen fluoride(AHF) with and without the reactants and to measure fluorine evolution potential. In a batch cell, chronoampherometric electrolysis and various chemical analysis such as GC, GC/MS and IR were used to understand the amphere change of electrode and the reaction paths. Fluorine equilibrium potential was found to be about 2.8V(vs. Cu/CuF₂) from the cyclic voltammograms and decay curves of anode potential in AHF. In batch processes, the ECF proceeded in two distinguished steps. The first step proceeded electrochemically and the second one chemically. Under 7V(vs. Cu/CuF₂), amount of crude products was proportional to the applied anode potential. Above 7V(vs. Cu/CuF₂), it had a hundred percentage with weight ratio of reactants and productivity of PFOSF was almost constant.
전남지역 한약자원식물 수집분류 및 이용체계에 관한 연구 II. 백운산의 약용식물 자원
이종일(JongIll Lee) 한국자원식물학회 1988 한국자원식물학회지 Vol.1 No.1
전남지역의 명산중의 하나인 백운산 지역에 분포되어 있는 한약자원 식물을 수집 및 분류하여 약용작물로 재배하기 위한 기초자료로 활용하고자 이 지역의 한약자원 식물의 분포를 조사한 결과는 다음과 같았다. 1. 백운산에 분포되어 잇는 약용자원은 60과 250종으로 분류되었다. 2. 분포수종중 과본류는 161 종 목본류 89종이 분포되어 있었다. 3.과본류는 사삼, 도라지, 쑥, 엉겅퀴, 질경이, 차조기, 쇠무릎, 반하, 하수오, 결명자, 용담초, 맥문동, 하고초, 둥글레, 참마, 칡 등이 많이 분포되어 있었고, 목본류로는 굴피나무, 가래나무, 호두나무, 후피향나무, 모란, 이팝나무, 쥐똥나무, 누리장나무, 고로쇠나무, 비자나무, 삼나모, 때죽나무, 모과나무 등이 한약재료로 많이 사용되는 것들이었다. The plants medicinal resources of Mt. Baegun were investigated 21 times from March 1, 1986 to December 30, 1987. In order to analyze the vegetation of Mt.Baegun area, herb plants structure and distribution. Herb plants of Baegun Mt.consisted of 60 families, 250 species in all, The resourees of important herb drugswere Campanulaceae, Salicaceae, Moraceae, Polygonaceae. Amarantaceae, Plant-aglnaceae, Labiatae, Compositae, Asclepiaclaceae, Leguminosae, Gentianaceae, Liliaceae, lilicaceae, Dioscoreaceae, Caprifollaceae, Ranunculaceae, Lauraceae, LardicaDalaceae, Araliaceae, Solanaceaer Cornaceae, Fagaceae and Rosaeeae. Theherb durgs were eomparatively more than in other mountains in our country.
Brake Torque Vectoring을 이용한 차량의 운전성 향상에 대한 연구
이종일(Jongil Lee),김인용(Inyong Kim),구형찬(Hyoungchan Koo),김형수(Hyoungsoo Kim),김영우(Youngwoo Kim),오승규(Seungkyu Oh),노지훈(Jihoon Roh),윤동필(Dongpil Yoon),이강원(Kangwon Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
This paper presents a mathematical model of multi-dynamic vehicle model. A torque vectoring brake (TVB) system is proposed to improve the stability and the agility of vehicle. The algorithm of TVB system is proposed based upon a sliding model controller. The proposed algorithm optimizes control of wheel slip during the inside of vehicle wheel slip. ISO standard test procedure is used to evaluate the performance of TVB system. The TVB performance is numerically implemented using MATLAB and CarSim commercial software. The simulation results show the acceptable performance of TVB comparing without TVB. For conclusion, the TVB system is developed and evaluated to improve vehicle dynamic characteristics and handling performance. The TVB system shows the better handling performance and agility specially under-steer control situation.
트레일러를 장착한 차량의 Neutral Sway 감쇠를 위한 Yaw Moment 제에 관한 연구
이종일(Jongil Lee),이강원(Kwangwon Lee),오승규(Seungkyu Oh),노지훈(Jihoon Roh),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, the development of yaw moment control algorithm is studied to reduce neutral sway response of vehicle with trailer. Generally, trailer has been changed the dynamic characteristics of that vehicle. The changed dynamic characteristics affected include rotation about the yaw axes and transitions in the lateral direction. Due to kinematic constraints of trailer with vehicle, the response of vehicle presents unstable and nonlinear characteristics. To improve vehicle stability, the yaw moment controller is proposed in this paper. The 3-DOF vehicle model with trailer is representing to estimate the vehicle characteristics, and the yaw moment controller is implemented using simplified 3-DOF Vehicle model. In this study, the yaw moment controller is proposed to reduce neutral sway response of vehicle with trailer. Due to changing of vehicle dynamic characteristics with the yaw moment controller, it is required to validate the stability of vehicle-trailer through SAE J2664. SAE J2664 is standard test procedure that is proposed evaluation method of natural sway response of a particular trailer. The simulation result shows the response of vehicle-trailer with proposed the yaw moment controller. As conclusion, the yaw moment controller with 3-DOF model is proposed and evaluated through J2664. In addition, the simplified yaw moment controller is proposed for improving vehicle-trailer stability.
이종일(Jongil Lee),김형수(Hyoungsoo Kim),오승규(Seungkyu Oh),이강원(Kangwon Lee),김인동(Indong Kim),구형찬(Hyoungchan Koo) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
TPMS(Tire Pressure Monitoring System) comprise valve stem mounted wheel units for pressure measurement system. From FMVSS138 application, the most vehicles required to put TPMS as standard system. In this paper, we propose new ESC(Electric Stability Control) control strategy with TPMS application. Due to lack of tire pressure, the lateral tire stiffness is decreased. For better ESC performance, the compensation algorithm is required. In this paper, the 7-DOF vehicle model is representing to evaluate the vehicle characteristics, and the yaw moment controller is implemented. The stability control is proposed to integrate with TPMS and compensation algorithm. The result shows the response of vehicle with proposed the algorithm and studied the vehicle stability improvement with proposed control strategy. As conclusion, the stability control with 7-DOF model shows improved performance ESC through TPMS application.
트레일러를 장착한 차량의 Natural Sway Response에 관한 연구
이종일(Jongil Lee),오승규(Seungkyu Oh),노지훈(Jihoon Roh),이강원(Kangwon Lee),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In this paper, dynamics and stability of vehicle in the yaw plane are examined through 3-DOF vehicle model using standard methodology SAE J2664. This test procedure is proposed evaluation method of natural sway response of a particular trailer. The coupling between vehicle and trailer as two pivoted rigid bodies has been investigated, in view of concerns that the coupling strength varies as vehicle-trailer parameters changing. The changed dynamic characteristics are affected by rotation about the yaw axes and transitions in the lateral direction. Due to the natural sway response of trailer, dynamic characteristics of the vehicle-trailer show unique responses when the impulse steer is applied in the yaw plane motion. In this research, the simple 3-DOF model is proposed to identify the characteristics of the natural sway response. The simulation results show the response of vehicle-trailer based on various trailer’s parameters. As a result, the mathematical model of 3DOF model is proposed and evaluated through J2664. Based on the results of this paper, we could propose a basis model of vehicle-trailer estimator for further research.
차량거동 추정을 위한 관성센서의 위치에 따른 ESC 성능변화에 관한 연구
이종일(Jongil Lee),오승규(Seungkyu Oh),노지훈(Jihoon Roh),이강원(Kangwon Lee),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In this paper, a effect of IMU(Inertia Measurement Unit) sensor position variation is studied to evaluate stability control performance. The stability control adds the ability to assist the driver in negotiating understeer and oversteer by using IMU sensor, and by adding corrective braking and engine torque to the vehicle as appropriate. The stability control is related to the sensor accuracy to provide driver and vehicle dynamic information to the system’s electronic control unit. The sensor position is affected measuring and estimating vehicle dynamic characteristics regarding stability control. Due to kinematic constraints of IMU sensor, the measured signal presents distorted vehicle response. In this paper, the 2-DOF vehicle model is representing to estimate the vehicle characteristics, and the yaw moment controller is implemented using simplified 2-DOF Vehicle model. The stability control is proposed to identify response of vehicle with various sensor offset. The simulation result shows the response of vehicle with proposed the yaw moment controller and studied the vehicle stability regarding sensor position effect. As conclusion, the stability control with 2-DOF model is evaluated through evasive double land change maneuver.
차량의 Wheel Alignment 변화에 따른 타행주행 특성
이종일(Jongil Lee),장진희(Jinhee Jang),노지훈(Jihoon Roh) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
This paper presents a study of wheel alignment effect regarding coast down simulation. Due to greenhouse effect and CO2 regulation from EU and others country, Car Company enforce to improve fuel economy through all parts and system of vehicle. They adapt many solution to reduce overall friction of vehicle such as low rolling resistance tire and low drag caliper and so on for vehicle dynamic perspective. In this study, vehicle dynamics were studied to find out improving coast down characteristics, because it needs to calculate F/E of each vehicle to measure specific coast down characteristics of vehicle and it affects overall F/E improvement or worsening. In this paper, vehicle wheel alignments were studied within vehicle architecture because wheel alignments have a tolerance from minimum to maximum within vehicle dynamic performance bandwidth. Using DOE (Design Of Experiments) methods, wheel alignments effect were evaluated through 121 load-cases based on Kriging Method. To simulate vehicle dynamics due to changing wheel alignment, CarSim was used and post processed EC method. From this study, the wheel alignments were affected coast down characteristics through simulation and proposed optimal wheel alignment parameter. Through this results, proposed optimal wheel alignment are improved cost down characteristics within vehicle performance bandwidth.