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한창수(Changsoo Han),윤덕원(Deok won Yun),최현석(Hyeunseok Choi),홍원표(Wonpyo Hong),강은구(Eungoo Kang),최헌종(Hunjong Choi) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Recently PZT is used in ultra precision mechanism field. PZT itself has a small driving range although it has a high resolution. Many methods, such as inchworm, impact driving, inertial sliding method, etc., have been applied for moving range expansion. In this study, a new actuating mechanism for rotational motion with two driving PZT is proposed. The Fixed-Fixed beam support is applied for compensation of the difference in driving force between expansion and contraction of PZT. The behavior and design parameters of the proposed mechanism are analyzed for improving performance.
[차량운동성능부문] Steer-Wire 시스템과 ABS에 의한 요 모멘트 제어
윤석찬(Seokchan Yun),한창수(Changsoo Han) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
This paper presents die modeling mill control algorithm of a steer-by-wire (SBW) system for improving the performance of die vehicle. The control algorithm is based on die variable steering gain concept mid derived by using an enhanced reference yaw rate and lateral acceleration feedback. Finally this algorithm has combined with the ABS control algorithm. The lane change maneuver in die high ?? and ??-split conditions shows that the vehicle performance with proposed control is drastically enhanced not only in Inking performance, but also in directional stability
안창섭(Changseop An),한창수(Changsoo Han),안상규(Sanggyu Ahn),조현철(Hyunchul Cho) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
When vehicle is stayed at one spot or carried by transport for a long time, tire is deformed by environment elements. It is called tire flat spotting phenomenon. This tire deformation makes the vibration of the vehicle like steering wheel shake, body's under-floor tremble. This research analyzed the results which are induced by each environment elements and found the root causes of the tire flat spotting. It showed that the root causes are the carcass weakness and the stress concentration locally of tire tread applied to the tires. Finally this research suggests the re-occurrence test process for prevent of the tire flat spotting before tire mass production.
스튜어트 플랫폼형 평행식 로봇의 동역학적 모델링과 해석
장형배(Hyung-Bae Jang),한창수(Changsoo Han) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
A dynamic modeling and analysis for the Stewart platform type of parallel robot is addressed. The dynamic modeling is performed based on the method of Kinematic Influence Coefficients(KIC) and transfering of the generalized coordinates. The optimum geometric configurations of the system that minimize the actuating forces at the linear actuator are found for several trajectories by using the optimization technique.