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양나래,권영주,조우근,최동준,한창호,Yang, Na-rae,Kwon, Young-joo,Jo, Woo-keun,Choi, Dong-jun,Han, Chang-ho 대한중풍순환신경학회 2010 대한중풍.순환신경학회지 Vol.11 No.1
Paralytic ileus is one of the common complications in stroke patients. In western medical treatment, surgery or conservative care is used for treating ileus. In this case, patient diagnosed as paralytic ileus had problems of constipation, or abdominal distension. Therefore the patient were treated with Crotonis Fructus(巴豆), and the patient showed improvement in X-ray findings and these symptoms. So we report this case.
유압 트랜스포머를 이용한 에너지 절감형 유압시스템에 관한 기초연구
이민수(Lee Min-Su),안경관(Ahn Kyoung-Kwan),조용래(Cho Yong-Rae),조우근(Jo Woo-Keun),Ho Triet Hung 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
In order to reduce energy consumption, secondary controlled system has been applied to many types of equipments. In lifting equipments or press machines using hydraulic cylinder, a hydraulic transformer is used as a control component instead of a valve for motion control and a component for recovering potential energy of load. The transformer is combination of a variable displacement pump/motor as a secondary controlled element and a fixed displacement pump/motor. Based on the nominal model derived from mathematical model, the feedback type two-degree-of-freedom controller is designed and implemented. From simulation results, the disturbances including nonlinear friction torque, leakage flow and load force can be compensated and good positioning accuracy is obtained. It show that the proposed controller is effective.
유압 트랜스포머를 이용한 유압 실린더의 에너지 절감에 관한 연구
안경관(Ahn Kyoung-Kwan),이민수(Lee Min-Su),조용래(Cho Yong-Rae),윤주현(Yoon Ju-Hyeon),조우근(Jo Woo-Keun),윤홍수(Yoon Hong-Soo) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
In order to reduce energy consumption, secondary controlled system has been applied to many types of equipments. In lifting equipments or press machines using hydraulic cylinder, a hydraulic transformer is used as a control component instead of a valve for motion control and a component for recovering potential energy of load. The transformer is a combination of a variable displacement pump/motor as a secondary controlled element and a fixed displacement pump/motor. In this paper the effect of transformer is studied. Multiple closed loop controllers with displacement feedback of variable pump/motor, speed feedback and position feedback of cylinder are used. The efficiency and energy consumption when cylinder is driven up and down is calculated by simulation. Simulation results show that considerable energy saving is achieved by choosing load ratio, circuit type and supply pressure.