1. 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.

2. 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.

3. 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

4. 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, 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

5. 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

6. 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.

7. 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.

8. 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

9. 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

10. Reference And reference
S. H. Park “Characteristics of an Electro Hydrostatic Actuator and Application Fields” 유공압시스템학회지 제6권 제1호 pp. 2~ 년 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~ 년 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
CS Cam㈜
RPM Tech㈜
And reference

11. Question
Do you have any question?