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정종렬(Jongryeol Jeong),이대홍(Daeheung Lee),신창우(Changwoo Shin),박영일(Yeongil Park),차석원(Suk Won Cha) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Many countries try to restrict the vehicle efficiency and output gas especially CO2 in these days because of the global warming. It is considered that hybrid electric vehicles (HEV) can be a available solutions for the problem. In HEV system, it is an important issue to distribute of the power between engine and the motor effectively. In this paper, a control logic based on the optimal control theory is suggested for a parallel hybrid bus. It is applied in the forward simulator to verify the availability of the control logic. It is shown that the logic is appropriate to drive the vehicle according to the selected driving cycle. After this study, further research about verification of the logic and application capability for the other driving cycle will be conducted.
타이어 슬립 모델을 고려한 4륜 구동 하이브리드 전기 차량의 동적 최적화 기반 후뱡향 시뮬레이션 프로그램 개발
정종렬(Jongryeol Jeong),김형균(Hyungkyoon Kim),임원식(Wonsik Lim),차석원(Suk Won Cha),강상욱(Sangwook Kang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Inline system 4WD hybrid electric vehicle is driven by engine and motor which are connected different tire axis independently. Front wheel of the vehicle is driven only by the engine which is exactly the same with conventional vehicle. On the other hand rear wheel of the vehicle is driven by the motor so that the vehicle can be driven in electric vehicle mode, hybrid electric vehicle mode, engine only mode and regenerative braking mode as similar as the typical parallel hybrid electric vehicle. In this paper, a backward simulation program applied by dynamic programming which has tire slip model based on the vehicle dynamics was developed to express the characteristics of 4WD hybrid electric vehicles. It is possible to calculate the optimal fuel economy and other various status of the vehicle when the vehicle follows the given driving cycle. It is considered that optimization of the vehicle components and development of control logic for the vehicle are possible to utilize the backward simulation program.
전자 제어식 주차브레이크(EPB)의 모델링 및 실험을 통한 검증
정종렬(Jongryeol Jeong),신창우(Changwoo Shin),이대흥(Daeheung Lee),임원식(Wonsik Lim),차석원(Sukwon Cha) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Electric Parking Brake(EPB) is the parking system which is operated by electric control actuator. It differs from the mechanical parking brake system which is operated by lever/pedal in need of human power. The EPB system is composed of DC motor, helical/differential epicyclic gear, screw, cables, and sensor. This paper describes about the EPB system mathematically and constructs a modeling of the EPB system using MATLAB/SIMULINK. Especially, SimMechanics library in SIMULINK is used to make each parts of system a module. By making modeling of the friction torque between bolt and nut, Cable tension can be maintained after the motor operating stops.
차량 안정성 및 선회 성능을 고려한 휠 모터 구동 버스 시스템 제어 알고리즘 개발
정종렬(Jongryeol Jeong),최종대(Jongdae Choi),신창우(Chang Woo Shin),임원식(Wonsik Lim),차석원(Suk Won Cha) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Recently, many academies and vehicle companies have researched electric vehicle able to be a solution of global warming and increasing of oil price. Wheel motor drive system which do not utilizes complex transmission or differential gear is an effective vehicle system of various kinds of electric vehicle system. In wheel motor drive system, appropriate power distribution of traction motors should be conducted for the performance of cornering and safety of the vehicle. In this paper, a control algorithm based on PID control theory was developed for the traction of the vehicle. With the developed control algorithm, forward simulations were conducted using six degrees of freedom vehicle dynamics simulation program. From the simulation results, it was verified of safety and cornering performance of the vehicle. For the actual application of the control algorithm, further research, such as combining with regenerative braking algorithm or vehicle speed estimation algorithm, is on the plan.
최적화 기법을 이용한 상용 하이브리드 차량의 최적 배터리 용량 선정에 관한 연구
정종렬(Jongryeol Jeong),이대흥(Daeheung Lee),신창우(Changwoo Shin),임원식(Wonsik Lim),박영일(Yeongil Park),차석원(Sukwon Cha) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
These days, many restrictions about the vehicle emission gases especially CO2 are increasing because of global warming. Simultaneously studies about hybrid electric vehicle (HEV) are increasing. In this situation, hybridization for heavyduty system vehicle such as bus or truck can be a realistic solution. Heavy-duty vehicles’ driving cycle is more predictable than the other vehicles. It is easier developing control strategies for Heavy-duty vehicles than the others. As making a hybrid system, size of battery is important factor because of its expensive cost. In this paper, battery sizing of a heavy-duty system will be suggested using optimal control method. By using this method, it will be possible to choose safe and effective size of battery.