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지능형 차량 도로 스시템에서 종적 차량 군집제어에 관한 연구
원문철(M.C.Won) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
A real time control algorithm for the longitudinal spacing control of vehicle platoone in IVHS is simulated. The longitudinal vehicle dynamics including engine. brake. torque converter. wheels. and tire slip are modeled as linear and non-linear elements. The engine and brake control algorithms based on multiple surface sliding control include adaptive observers and filters that condition measurement signals. The control law used for the real time experiment of four car platoon is simulated for four car and ten car platoon systems. The car to car communication time delays of vehicle velocities and accelerations ars included in the simulation. The simulation results of the four car platoon in general agree with the experimental results.<br/>
87C196CB 마이크로 프로세서를 이용한 천연가스엔진의 엔진제어장치 개발에 관한 연구
최인영(I.Y.Choi),원문철(M.C.Won),홍순철(S.C.Hong) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
The number of spark ignition engines using compressed natural gas(CNG) is increasing as the automotive air pollution problem is becoming a serious social problem. In this study, an Electronic control unit(ECU) for MPI type CNG engines is developed using Intel 87cl96CB Micro-processor. The developed system consists of ECU hardware, software program written in assembly and C language, PC monitoring system. The ECU system is tested an a 2000cc CNG engine converted from a gasoline engine, and shows promissing results on air/fuel ratio regulation, and output torque generation.<br/>
트로틀 앵글 제어에 의한 내연기관의 토오크 및 속도의 비선형 제어
원문철(M.C.Won),강병배(B.B.Kang),박문수(M.S.Park),김태영(T.Y.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
A nonlinear engine torque and speed control algorithm using throttle angle control is developed with an engine load torque estimation algorithm. Three 3-dimensional nonlinear engine maps as a part of the nonlinear control algorithm are obtained from steady state engine dynamometer tests. An electric throttle actuator is developed using a stepper motor and a 8 bit micro-processor. The speed control and external load estimation algorithm are tested via engine speed control experiments, and show good performance enough for using various engine torque and speed control applications.<br/>
적응 순항 제어(ACC) 차량의 제어 알고리즘 및 실시간 수치실험 프로그램 개발
원문철(M.C.Won),강연준(Y.J.Kang) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
Adaptive Cruise Control(ACC) is one of key features of Intelligent Transportation System(ITS). In ACC, the steering is done by a driver, but the engine throttle valve and the brake are controlled electronically. The relative velocity and distance from the preceeding vehicle are measured by radars or image processing units and relevant vehicular spacing is maintained in ACC control systems. In this study, vehicle longitudinal dynamics are modeled to simulate vehicle longitudinal maneuver and to design longitudinal controllers for ACC vehicles. The control algorithm is designed based on the modeled vehicle longitudinal dynamics using a non-linear sliding mode control method. To verify the performance of the control algorithm, a real time numerical simulation program is developed on a Silicon Graphics workstation using C-language. A real time graphic program is also developed and integrated with the numerical simulation program.<br/>
적응 슬라이딩 모드 제어를 이용한 차량 간격 제어기 설계에 관한 연구
백창현(C.H.Paik),장광수(K.S.Chang),원문철(M.C.Won) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_2
An adaptive sliding mode controller with loads estimation is designed for AICC. The developed discrete time adaptation law differs from that of conventional sliding mode control. And aims at adaptation on a large disturbance or unmodeled dynamics. The closed loop stability is checked in the discrete time domain. And the exponential decay of the adaptation error can be guaranteed by a proper placement of the discrete time closed loop poles. The results of numerical simulation show better adaptation and tracking performance over the conventional adaptation scheme. The new adaptive scheme is shown to be especially effective under rapid changes of commanded speed.<br/>
응답형 그래픽스를 이용한 AUTODYN7의 차량 모델러 개발
김성수(S.S.Kim),한종규(J.G.Han),강연준(Y.J.Kang),최권영(K.Y.Choi),원문철(M.C.Won) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
A vehicle modeling processor for AUT0DYN7 (which is dynamic analysis program for vehicle system) has been developed with 3D graphics. In order to reduce mistakes on the error prone modeling procedure, an automatic data transfer capability from CAD data to multibody vehicle data and an interactive graphics capability have been also developed. An assembled 3D suspension graphic image is promptly changed and displayed, whenever users' suspension hard point input data are changed. With aid of the interactive graphics capability, more reliable and convenient vehicle modeling procedure has been achieved.<br/>