Our goal, and Apparatus I'm EHA team member Yong-gyu Hwang who presents this time. I will start the presentation. this is team member and team name is EHA.

Context Purpose Apparatus in EHA Accumulator LVDT PUMP History log - About our goal Apparatus in EHA Accumulator LVDT PUMP History log Reference Q & A Today, I will clarify the team purpose and present about a actuator, LVDT, and a pump of the EHA system. I have a lot of thing to talk about that.

Purpose - remind EHA team’s goal Research EHA in Developed country Plan to test our EHA after created. Research EHA in Developed country EHA has a narrow field in Korea Why? Make a EHA system in use with our hands. Before introducing the EHA, I’ll talk about our purpose. Our purpose is making a EHA system in use that isn’t used before in Korea.. As we presented before, development of EHA system in KOREA isn’t mature. It used in very narrow field. This picture shows the purpose of our team. We will make the system and it will revised for these purposes

Purpose - remind Planning an Interview EHA of RPM TECH 2009, EHA of Boryong thermo electric power plant Do their EHA system research So we planed to do a meeting with RPM tech. We already talked about RPM tech. RPM tech installed the EHA system of the thermoelectric power plant in Boryong, 2009. but we could make a plan to meeting, not did now. Now we making a script and revise to do a meeting perfectly. So we can talk about this presizely on next time

Apparatus in EHA Actuator Motor Pump Cylinder LVDT Via electric Last presentation Actuator Motor Pump Cylinder LVDT Via electric Diagram of EHA OK. Then, Let’s go to the apparatus in EHA. This picture shows how the EHA system works. We already talked about a motor that controls a pump at last time. Now I am going to talk about an Actuator, LVDT, and a pump. Today’s topic

Cylinder - Actuator = Cylinder + LVDT Specification Load type Single load Diameter Φ63mm Pressure 140kgf/cm2 speed 8~200mm/sec length 300mm Force 4361kgf Cylinder (Chosen one from KCC) 1st. I’m going to talk about an actuator. This actuator is the chosen one by us. The specification of actuator meets our requirements. So we talk this to our Professor. We can get an approval from him. acceptable for our purpose. Got an approval of our prof.

LVDT Electric -> position sensor Example of LVDT assignment Diagram of LVDT assignment Research the method how to install LVDT in the Cylinder. Discussing with KCC 2nd, is the LVDT. This is the LVDT diagram how this works. Now we are researching how to install this LVDT into the cylinder. So we planed to talk with KCC HYD cylinder coorporation about the possibility of the installation of the LVDT.

Pump - Selection? Bi-direction pump Example of the pump Final. This is a pump. We selected the Bi-direction pump to use in EHA system. We tried to select actual product model, but there are too many FRs to consider. So we asked our difficulties to our professor. Professor said he could introduce a mento who can talk about this. So we can talk about the pump after the meeting a mento. Example of the pump

History Log Chart 9/29 Discuss about the topic of next presentation 10/1 Making plans for meeting with the RPM tech 10/3 Clarifying the team purpose & selecting the part specification 10/5 Making PPT & preparation for PPT This the history log of previous week

Reference And reference S. H. Park “Characteristics of an Electro Hydrostatic Actuator and Application Fields” 유공압시스템학회지 제6권 제1호 pp. 2~10 2009년 3월 S. H. Park, “A Study on Control of Electro-Hydraulic Servo System Using High Speed Solenoid Valve,” Dept. of Mechanical and precision Engineering Gradate School Pusan National University, Feb, 1996. 김종식, “선형 제어시스템 공학” 淸文, 2005. Y. H. Park, S. H. Park “EHA(Electro-Hydrostatic Actuator) Identification and control of Position Control System for Electro-Hydraulic Actuator” 한국동력기계공학회지 제15권 제2호 pp.69~77 2011년 4월 Automatic Control Systems (9 New, Hardcover) (7) 리쯔밍, 이지민, 박성환, 김종식, 박용호, “전기 정유압 구동기를 적용한 유압식 동력 조향 시스템”,한국동력기계공학회지 15권 6호 86 ~ 94 페이지 (8) 이지민, 박성환, 박민규, 김종식,”적응PID 슬라이딩 모드 제어기법을 적용한 EHA 시스템의 위치제어(A Position Control of EHA Systems using Adaptive PID Sliding Mode Control Scheme), 한국동력기계공학회지 17권 4호 120 ~ 130 페이지 Min Gyu Park. Sung Hwan Park, Jong Shik Kim, Ho Gil Lee “Modeling and Control and Electro Hydrostatic Actuator Systems” 2009년 8월 pp.3003 - 3008 CS Cam㈜ http://www.cscam.co.kr/main/main.php RPM Tech㈜ http://www.rpmtech.co.kr/ And reference

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