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그래피티 아트의 조형적 근거에 관하여 - 키스 해링의 작품을 중심으로 -
조치훈 한국일러스트레이션학회 2011 일러스트레이션 포럼 Vol.12 No.27
그래피티 아트의 기원은 고대에 사람들이 흙벽에 어떤 모양들을 긁어 그리는 것으로부터 비롯됐다. 최근, 뉴욕과 같은 큰 도시에서는 젊은 사람들이 그들의 시위를 위해 도시적 그래피티 그린다. 그래서 초기의 그래피티 예술가들은 도시의 주요 제도에 반한다는 공공기물 파손 죄로 체포되기도 하였다. 도시 거리의 예술가들은 활동적이었지만 생각(사상)없이 작품을 만들고 있다고 인식되어왔다. 본 논문에서는 그래피티 예술가들이 어떤 이론과 같은 근거들을 가지고 있었는지를 찾아보려고 노력하였다. 이를 위해, 잘 알려진 그래피티 예술가 중 한 사람인 키스 해링의 작품을 연구하였고, 그 결과, 해링의 작품들은 로버트 핸리(Robert Henri), 듀뷔페(Dubuffet), 알레친스키(Alechinsky) 그리고 크리스토(Christo)의 이론에 영향을 받은 것이라고 결론지을 수 있다. The graffiti arts are originated from the ancient times that people have drown some figures with digging earth walls. Recently, in the areas of big cities like New York, some young and minor people have made urban graffiti for their protesting. Therefore the early graffiti artists were sometimes arrested against major systems of the city as a vandalism. The urban street artists were active but made their works without thoughts. In this thesis, I have tried to figure out that the graffiti artists have thoughts of form theories or not. Through the work study of Keith Haring who is the one of well known graffiti artists, I could make conclusion that the works of Haring have shown the real forms under effect of the theories of Robert Henri and works of Dubuffet, Alechinsky and Christo.
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.
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.
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.