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HILS를 이용한 하이브리드 자동차의 EMB 제동 성능해석
조치훈(Chihoon Jo),김현수(Hyunsoo Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, a hardware in the loop simulation(HILS) of the electro-mechanical brake(EMB) is performed for a hybrid electric vehicle(HEV). First, a EMB test bench is designed and an EMB simulator is developed based on the dynamic models. It is seen from the simulations and experimental results that the EMB is able to generate the target clamping force closely. Using the EMB hardware and HEV simulator, HILS is performed. From HILS, it is found that the EMB satisfies the demanded braking performance. It is expected that the EMB design technology and performance simulator developed in this study can be used in design of the EMB for hybrid electric vehicles.
EMB(electromechanical brake) 시뮬레이터 개발
조치훈(Chihoon Jo),황성호(Sungho Hwang),김현수(Hyunsoo Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, a EMB simulator is developed. In order to develop the simulator, dynamic models of the DC motor, reduction gear, screw tread gear, pad and brake disk are obtained using Bondgraph. Performance simulations are carried out using the EMB simulator developed with MA TLAB SIMULINK and motor torque, motor rotational displacement, clamping force, pad and disk compression displacement are calculated. It is found from the simulations that the EMB motor should be controlled to generate negative torque in order to decrease the clamping force. The EMB simulator developed in this study can be used to design the EMB.
조치훈(Chihoon Jo),이상목(Sangmok Lee),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, a electro-wedge brake(EWB) and electro-mechanical brake(EMB) simulators are developed. In order to develop the simulators, dynamic models of the DC motor, reduction gear, screw tread gear, wedge, pad and brake disk are performed. Performance simulations of vehicle equipped with front EWB and rear EMB are carried out using the EWB and EMB simulator developed with MATLAB Simulink and co-simulation of CarSim vehicle model. It is found from the simulation results that the EWB and EMB simulators developed in this study can be used in development of the EWB and EMB.
조치훈(Chihoon Jo),황성호(Sungho Hwang),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In this paper, a clamping force control algorithm is presented along with a consideration of the frictional characteristics and the estimation of the clamping force for a planetary reduction gear type EMB. The frictional model is developed by including the frictional effect of the motor, planetary gear, and screw thread. Since the clamping-force estimation requires the distance of the contact gap between the pad and the disk, an initial gap-distance control algorithm is proposed that uses the gradient change of the motor torque. This paper is concluded with a discussion of the performance of the control algorithm by comparing the simulation results with experimental results.
자동변속기 기반 하이브리드 자동차의 하향변속중 회생제동 제어 알고리즘 개발
조치훈(Chihoon Jo),김정욱(Jungwook Kim),김현수(Hyunsoo Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In this paper, regenerative braking algorithm is proposed during down-shift for a 6-speed 2-shaft parallel HEV, which satisfies the demanded braking force and driving comfort. First, down-shift strategy is suggested during the braking by considering the re-acceleration performance. To maintain a driving comfort regenerative braking algorithm is developed considering a response characteristic of the electronic hydraulic brake. Using the electronic hydraulic brake hardware and HEV simulator, HILS is performed. From HILS, it is found that regenerative braking algorithm satisfies the demanded braking force and the driving comfort to evaluate the control performance during down-shift
조치훈(Chihoon Jo),김종성(Jongsung Kim),손미진(Mijin Son),천재승(Jaeseung Cheon),최혁수(Hyeoksoo Choi),전성용(Sungyong Jeon) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
An electronic wedge brake (EWB) uses the wedge principle to provide a self-reinforcement mechanism, resulting in reduced power to the actuation motor. However, EWB needs mechanical device for adjust of pad wear, even if EWB need a extra equipment in order to compensate adjust of pad wear, and it has disadvantage that braking force can not be occurred and controled if CAN or supplied power are disconnected. The hEWB has fast response and mechanical backup using wedge mechanism and hydraulic system when the hEWB is failed. In this study, hEWB with a proposed structure is designed and developed and the braking performance of the proposed hEWB was verified using test rig and vehicle testing.
이상목(Sangmok Lee),조치훈(Chihoon Jo),송한림(Hanlim Song),조연선(Yeonsun Cho),김인수(Insu Kim),현동윤(Dongyoon Hyun),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Electro-wedge brake(EWB) uses the wedge principle which provides the self-reinforcement mechanism and this offers the reduced current of the actuation motor. However, it can also lead to an unstable open-loop system. In this paper, upper wedge moving type EWB is developed and a control algorithm is suggested in order to keep the wedge stable within the push-pull range and to prevent the EWB system from jamming. The EWB performance is evaluated by the dynamometer and simulator. It is found from the test and simulation results that the EWB developed in this study shows satisfactory performance.
6속 AT 기반 병렬형 HEV의 오일펌프 효율 개선에 대한 연구
이재상(Jaesang Lee),조치훈(Chihoon Jo),김연호(Yeonho Kim),김종현(Jonghyun Kim),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Improvement of an oil pump system efficiency is investigated for a 6 speed AT based 2-shaft parallel hybrid electric vehicle(HEV). First, dynamic models of the HEV powertrain are obtained using AMESim and detail model of the mechanical and electric oil pump are constructed considering the pump loss. In addition, control algorithm of the HEV is developed using MATLAB/Simulink and performance simulator of the HEV is developed by co-simulation of the AMESim simulator and MATLAB/Simulink control logic. Second, electric oil pump(EOP) control algorithm is proposed for the operation range and optimal speed. It is found from the simulation results that the fuel economy of the HEV can be improved at about 1.9 percent by optimal combination of the mechanical oil pump and EOP.
자동변속기 기반 2축 병렬형 하이브리드 자동차의 토크컨버터 유/무에 따른 가속성능 시뮬레이션
이호섭(Hosub Lee),조치훈(Chihoon Jo),조서연(Seoyeon Jo),김현수(Hyunsoo Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, acceleration performance and engine clutch torque shock for a 4-speed automatic transmission based 2-shaft parallel hybrid electric vehicle are investigated. Powertrain model of the HEV is obtained and performance simulator is developed with or without torque converter. It is found from the simulation results that the HEV with torque converter shows better acceleration performance and reduced engine clutch torque shock at mode change. However, the package and cost problem need to be solved in design of the automatic transmission HEV with torque converter.