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실시간 ABS 시뮬레이션을 위한 차륜속도 시뮬레이터의 개발
김석민(S.M.Kim),배봉국(B.K.Bae),정재현(J.H.Chung),서명원(M.W.Suh),석창성(C.S.Seok),김영진(Y.J.Kim),이재천(J.C.Lee),김성봉(S.B.Kim),이선일(S.I.Lee),김장성(J.S.Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
In order to perform a vehicle driving simulation test in laboratory for the electronic control unit(ECU) analysis of anti-lock brake system(ABS), it is necessary to simulate the wheel speed signal which is to be controlled for the various road and driving conditions. The speed signal from the real wheel speed sensor is not only for the speed calculation but also for the diagnosis of the ABS system. In this research, wheel speed simulator is developed which can generate the equivalent signal as that of a real wheel speed sensor. The applicability of the wheel speed simulator is validated by the simulation tests using commercial ECU of ABS. The wheel speed simulator is based on the personal computer so that it can be applied to other vehicle tests involving vehicle speed and/or wheel speed.<br/>
김석민(S.M.Kim),배봉국(B.K.Bae),정재현(J.H.Chung),서명원(M.W.Suh),석창성(C.S.Seok),김영진(Y.J.Kim),이재천(J.C.Lee),김성봉(S.B.Kim),이선일(S.I.Lee),김장성(J.S.kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
The prevalence of microprocessor-based controllers in automotive systems has greatly increased the need for tools which can be used to validate and test control systems over their full time range of operation. The objective of this paper is to develope the real time simulator of anti-lock braking system using hardware-in-the-loop simulationbased on a personal computer. By use of this simulator, the analyses of commercial electronic control unit as well as the validation of the developed control logics for ABS were performed successfully. The simulator of this research can be applied to development of more advanced control system, such as traction control cystem,vehicle dynamic control system and etc.<br/>
이동광(D. K. Lee),공정식(J. S. Kong),고민수(M. S. Goh),강성재(S. J. Kang),이석민(S. M. Lee),이응혁(E. H. Lee) 한국재활복지공학회 2011 재활복지공학회논문지 Vol.5 No.1
본 논문은 전동 보행보조기의 편의성 향상을 위한 최적의 제어 이득을 찾고 제어 알고리즘을 설계하였다. 최근 노인의 인구가 의료 기술의 발달로 급속히 증가되고 있으며, 다양한 이동형 보행보조기구는 삶의 질을 개선하기 위해 개발되고 있다. 이러한 이동형 제품 중 수동형 보행보조기는 노인의 보행의 힘을 도와주는 전동모터를 가지고 있지 않아 노인들이 충분한 근력이 없기 때문에 경사로 및 문의 문턱 등 고르지 않는 지형에서 이동하는데 제안사항이 있다. 이러한 상황을 극복하기 위해 전동타입의 보행보조기를 개발하였다. 전동형 보행보조기는 수동형과 다르게 사용자가 조작을 해야 모터가 구동되는 구조이다. 이러한 구조는 사용자가 조작을 잘못 하였을 경우 상당한 불편함을 사용자에게 준다. 이러한 전동형 보행보조기를 수동형 보행보조기와 비교하여 조작의 편의성을 판단하고 기준을 만들어 사용자의 편의성에 대하여 제어 값을 변경하면서 사용자 편의성을 개선하였다. 본 논문에서는 보행의지를 인식하고 편의성의 성능을 측정할 수 있는 방법인 햅틱 센서를 소개하며 편의를 개선하는 제어 알고리즘을 제안한다. 또한 편의성의 평가는 COV(Center of Vehicle)와 사용자의 COP(Center of Position)과의 차이의 변화를 통해 상대적인 편의성을 평가하였다. 전동 타입 보행보조기와 새로운 측정방법을 도입하여 모든 과정을 실험을 통하여 확인 하였다. This paper aims to und the optimal control gain for enhancing the convenience of electric walking frames and design a control algorithm. With the recent advances in medical technology, there has been a rapid increase in the aging population and a variety of mobile walking frames have been developed for improvement of the quality of life. However, the manual walking frames of such mobile aids don’t have any electric motor which helps facilitate elderly users’ walking and thus are not efficient enough for the old people of weak strength to use especially when moving on uneven surfaces such as slopes or thresholds. The types of electric walking frames have been developed to overcome such inefficiency. Electric walking frames require users’ control operations for motor driving unlike manual frames. Therefore, when they are not properly handled, it causes considerable inconvenience to their users. The present study compared the electric walking frames with manual ones in terms of operational convenience and attempted to improve the user convenience of walking frames varying the control value for user convenience based on certain standards. This paper presented a haptic sensor designed to recognize the will to walk and measure the degree of convenience and proposed a control algorithm for improvement of convenience. For user convenience, this paper evaluated the relative convenience of walking frames in view of changing differences between the center of vehicle (CuV) and the center of position (COP). With the employment of an electric walking frame and a new measuring method, all the processes were experimentally tested and validated.
백석민(S M Baeck),이호도(H D Lee),김대업(D U Kim),이병근(B K Lee),이정환(J H Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
Aluminum 6061 alloy is widely used in automotive industry for structural parts, especially for hot forging applications. However, current automotive environments require better mechanical properties for less weight. In this study, compositional modification of billet-cast 6XXX alloy is investigated in terms of mechanical and metallurgical properties. The major elements modified were magnesium, silicon and manganese and mass production heat treatment conditions were applied. Developed new 6XXX aluminum alloy showed highly elevated mechanical strength around 400㎫ in tensile strength with good elongation value.
이석민(S. M. Lee),송점식(J. S. Song),문무성(M. S. Mun) 한국재활복지공학회 2010 한국재활복지공학회 학술대회논문집 Vol.2010 No.11
In this paper, we present the standardization of cosmetic gloves for upper limb amputees, which play an important role in psychological aspect as well as simply functional aspect. The classification of materials, shape and size were carried out, and the details of major properties controlling the performance of cosmetic gloves were chracterized. The color classification and specification were included, since the color match between prosthesis and skin is very important in a way that amputees get psychological comfort.