In this paper, the design of hydraulic actuating circuit of doing over-running load was performed. Generally, the counter balance valve has been used to protect over-run or free falling of acuating system. But sometimes, it makes some undesirable problems such as pressure surge or vibration. To overcome such problems and satisfy the system requirements, we suggest the hydraulic circuit actuated by servo valve. In order to verify the properness of suggested hydraulic circuit, hydraulic actuator with servo valve was modeled using ADAMS/Hydraulic which is a commercial dynamic analysis software for multi-body system. Also, the effectiveness of hydraulic actuating circuit was verified via test bed and real plant.

1. 서 론
 2. 시스템 분석 및 전산해석
  2.1 유압시스템 설계요구조건
  2.2 유압시스템 설계
  2.3 유압시스템 해석모델링
  2.4 유압시스템 전산해석 결과분석
 3. 모사시험장치 설계 및 시험결과
 4. 결 론
 References

• 정재욱(Member, Agency for Defence Development 1st R&D) | Jae-Wook Chung Corresponding author