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유전자알고리즘을 이용한 궤도차량 동력장치의 주행부하주기 도출
오철성(Chul-Sung Oh),임형은(Hyung-Eun Im),황원걸(Won-Gul Hwang) 한국자동차공학회 2005 한국 자동차공학회논문집 Vol.13 No.3
The durability of a vehicle is a very important performance which can be evaluated from endurance test. This study developed a procedure for determination of a duty cycle theoretically. Vehicle load data is classified and rearranged using standard test road profile. A load pattern and a duty cycles are extracted from classified vehicle data using genetic algorithm. A duty cycle could be utilized in dynamo test to meet required test mileage. The derived duty cycles have been verified by fatigue test through the dynamometer test.
최명욱,김환수,오철성,최성욱 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11
국내 자동차/건설기계 분야에서의 동력 전달 장치인 드라이브 시스템은 널리 알려진 기술이지만, 국내 항공 분야에서는 경험이 전혀 없는 기술 분야 중의 하나이다. 엔진으로부터 로터 시스템까지 동력을 전달하는 드라이브 시스템은 매우 정밀한 기술을 요구하는 고 난이도의 시스템이다. 본 논문에서는 스마트무인기 기술개발사업단에서 개발 중인 틸트로터 스마트무인기 드라이브 시스템 개발과 관련하여, 정밀 가공 기술을 요구하는 드라이브 시스템 주요 구성부품의 설계와 제작을 중심으로 결과를 기술한다. The power transmission device of cars/construction machinery parts in the Korea, the drive system is a widely known technology. But the applied technologies for development of the system had not ever experienced in the Korea aerospace parts. The drive system of SUAV transmitting power from Engine to rotor system that require very precise and advanced equipments. In this technical paper, summarization of development results for the tilt-rotor SUAV Drive System being developed in the Smart UAV Development Center is carried out in view of design and manufacture for the major components required the precision machining technology.
김우영(Woo-Young Kim),안기원(Ki-WonAhn),오철성(ChuI-Sung Oh),황원걸(Won-Gul Hwang),임형은(Hyung Eun Im) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
This paper presents a method to optimize the suspension geometry, that is, hard points in front double whishbone type suspension of a jeep using the multi body dynamic simulauon software and Taguchi method. The hard points have an effect on toe angle largely. The vehicle models include front and rear suspensions and are modeled with the interconnection of rigid bodies by kinematic joints and force elements using DADS. The design variables to have an effect on the kinematic characteristics are obtained through the parametric study and sensitive analysis with bump steer simulation of front suspension. An objective function is defined as the area of absolute differences between the desired and experimental toe angle. The design variables that make the toe angle optimized are selected using thc Taguchi method. Thc objective function for handling performance is RMS(Root Mcan Squares) of the roll angle, roll rate, yaw rate, and laternl acceleration at center of the gravity of a body while lane change. To evaluate hard points of the optimized the front suspension, lane change simulations are performed.
안기원(K.W.Ahn),안상호(S.H.Ahn),서권희(K.H.Seo),황원걸(W.G.Hwang),윤희석(H.S.Yoon),오철성(Q.S.Oh) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
To evaluate the safety and durability of the vehicle structure in the vehicle developing stage, many times and efforts have been required. It is difficult to find the reason of crack which was occurred in the body and frame of a vehicle during tests. Recently computer aided engineering technology has rapidly<br/> raised to solve the problems of safety and durability of the vehicle.<br/> In this study, dynamic stress analysis is performed to the frame of the vehicle by rigid and flexible<br/> multibody dynamic techniques during bump pass. The results of the analysis are compared to those of the test. The full vehicle dynamic models for the rigid and flexible body are accomplished by DADS; a special code for dynamic analysis. Dynamic stress analysis procedure is also developed using the accomplished dynamic models.