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임광호(K. H. Lim),권진욱(J. W. Kwon),이상헌(S. H. Lee),정병규(B. K. Chung),정찬범(C. B. Jeong),윤종일(J. I. Yoon) 유공압건설기계학회 2020 유공압건설기계학회 학술대회논문집 Vol.2020 No.12
궤도차량은 바퀴차량과 달리 마찰력이 상대적으로 커서 주행과 조향에 중요한 역할을 한다. 궤도차량의 주행은 주로 흙지면에서 이루어지고 지면상태가 단단하거나 부드러운지에 따라 특성이 달라지기도 하지만 조향 시 주행속도와 회전반경에 영향을 많이 받는다고 알려져 있다. 본 논문에서는 기존 J. W, Wong과 Sadi Al-Milli의 궤도차량 조향 시 동역학 해석을 바탕으로 하여, 차동 조향 시스템을 갖는 궤도차량(도저)에 적용하였다. 도저에 대해 GPS를 장착하여 주행속도와 위치를, 엔코더를 장착하여 좌우 기동륜 회전속도를 측정하고 횡마찰계수를 계산하여 주행속도와 회전반경의 관계를 확인하고자 한다.
임베디드 리눅스 기반의 NC프로그램 자동적재 시스템에 대한 연구 및 순차제어기 개발
윤종일(J. I. Yoon),안경관(K. K. Ahn) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This paper proposes the Embedded Linux System that can overcome the shortcomings of conventional CNC machine system. Linux is free of charge with the open source library and tools that can be used in the development of Kernel. Besides, Application is easily available through countless open source, allowing simple mending for seamless porting. This study have developed the study about NC Program automation Load System based on Embedded Linux and the ordered controller.
작업장치 위치에너지 회생을 위한 하이브리드 굴삭기 시스템 개발
윤종일(J. I. Yoon),안경관(K. K. Ahn),딩광졍(D. Q. Truong),강종민(J. M. Kang),김재홍(J. H. Kim) 유공압건설기계학회 2009 드라이브·컨트롤 Vol.6 No.4
Nowadays with the high fuel prices, the demands for energy saving and green emission of construction machinery have highly been increased without sacrifice of working performance, safety and reliability. The aim of this paper is to propose a new energy saving hybrid excavator system using an electro-hydraulic actuator driven by an electric motor/generator for the regeneration of potential energy. A 5 ton class excavator is analyzed, developed with the boom for the evaluation of the designed system. The hardware implementation is also presented in this paper. A control strategy for the hybrid excavator is proposed to operate the machine with a highest efficiency. The energy saving ability of the proposed excavator is clearly verified through simulation and experimental results in comparison with a conventional hydraulic excavator.
Structural analysis of 55hp servo-based hydrostatic transmission
J. G. Won(원종근),S. G. Chung(정성교),J. S. Jeong(정재수),J. I. Yoon(윤종일) 유공압건설기계학회 2021 유공압건설기계학회 학술대회논문집 Vol.2021 No.11
The hydrostatic transmission (HST) is composed of rotary parts, shafts, valve plate, swash plate, and servo pistons. Securing the structural stability of each part of HST has a great impact on product safety. In this study, structural stability analysis of HST applied to agricultural machinery and industrial vehicles was performed by using ANSYS software. For the conservative evaluation, the highest pressure conditions, 35.5 MPa and 2 MPa pilot pressure, were applied as load conditions. The number of grids used in the calculations ranged from 0.4 to 0.8 million, depending on the modeling. Structural analysis was performed on important parts, and the safety factor characteristics in each part were analyzed. As a result of structural stability analysis of major parts of HST, all parts had a safety factor of 1.5 or higher and were judged to be structurally safe (Table. 1). The results of this study are expected to provide important data for designing HST system.