http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 유충목(C. M. Yoo) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
김동명(D. M. Kim),장주섭(J. S. Jang),김태인(T. I. Kim),이종찬(J. C. Lee),유충목(C. M. Yoo),한성민(S. M. Han),남용윤(Y. Y. Nam),서자호(J. H. Seo),박진선(J. S. Park) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.6
Recently, an electronic hydraulic valves on behalf of the main control valve is widely used. The electric hydraulic valve is one of the main control valve to control the various actuators in the hydraulic system(This valve was a cartridge type of a 2port/2way and EHPV(Electro hydraulic proportional valve) and the main poppet is composed of a single valve. A main poppet in the electric hydraulic valve is determine to main flow line, which includes the ability to restrict or permit the reverse. Supply flow is proportionally controlled by the inner pilot pressure and the pilot pressure is controlled by the current of input EHPV. In general, pilot operated valves are supplied to the control pressure from the outside. However, this valve is supplied with pilot pressure from the inside. Therefore, the design variables of the main valve poppet and EHPV are closely related to each other. It was carefully analyzed the valve structure and how it works to improve the performance of the valve. We developed an analytical model considering the geometric shape and spring stiffness. The test results and the analysis confirmed the accuracy of the analysis model by comparing the results, and the performance enhancement study was performed using the analysis model. We examined the characteristics of the control range and the power loss by using the analysis model.
-
정황훈(H.H. Jeong),한성민(S.M. Han),신정우(J.W. Shin),유충목(C.M. Yoo) 유공압건설기계학회 2014 유공압건설기계학회 학술대회논문집 Vol.2014 No.4
This study concerns about stability analysis of slipper bearing in swash type piston pump that used in the EHA(electro hydrostatic actuator) system. The slipper bearing is a kind of hydraulic bearing that locates between swash plate and piston shoe. This hydraulic bearing needs high supply pressure and speed of pump’s rotation to be activated under the stable condition. The EHA system is some power pack that combines bidirectional pump and motor with hydraulic actuator to drive the actuator with motor’s speed and direction. In this system, a hydraulic pump is driven under the low supply pressure and speed of pump’s rotation because the actuator is controlled by pump’s flow. In this study, the author tries to find the stability criterion using Lyapunov function. For this purpose, the motion equation of piston was quoted from reference and the state equation was delivered. After that the Lyapunov function was defined to find the stable condition on equilibrium point.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
