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논문 상세정보

유압 블리드-오프 회로의 특성 재검토 및 실험적 동특성 모델링

Reexamination and Derivation of Empirical Dynamic Model for a Hydraulic Bleed-Off Circuit

Abstract

Meter-in, meter-out and bleed-off circuits are widely utilized in order to adjust the speed of a hydraulic actuator by using a flow control valve and in order to regulate the pressure of a hydraulic volume by using a simple on-off valve. In these circuits, a relief valve serves either to maintain constant system pressure or to protect the system from over-pressure loading. The relief valve of a bleed-off circuit is the second case frequently undergoing on-off action during operation. It makes the analysis of the pressure control characteristics of the circuit highly difficult. In this paper, steady-state flow rate, pressure, heat loss and efficiency of the three circuits are reexamined and basic experiments far obtaining the characteristics of a pump and relief valve are conducted. Finally, simple empirical first-order dynamic models of decreasing and increasing pressure were separately proposed and verified by comparison with experiment. As the result, the basis for the theoretical analysis of the pressure control characteristics of a bleed-off circuit using a simple on-off valve is established.

참고문헌 (9)

  1. Jeong Heon-Sul, 1977, 'Pressure Control Characteristics of ON/OFF 3-way Solenoid Valve Driven by PWM Signal,' Transaction of KSME, A, Vol. 21, No.3, pp. 485-501 
  2. Jeong Heon-Sul and Hyoung-Eui Kim, 'Experimental Based Analysis of the Pressure Control Characteristics of a Oil Hydraulic 3-Way On/Off Solenoid Valve Controlled by PWM Signal,' ASME Journal of Dynamic Systems, Measurements, and Control, Vol. 124, No.1, pp. 196-205 
  3. JeongHeon-Sul, Park Seong-Jin and Kim Chang-wan, 1997, 'Experimental Comparative Study of PWM Pressure Control Characteristics of 2-Way Solenoid Valve,' Spring coriference of KSPE pp. 107-111 
  4. 田中 裕久, 昭和 62年, 油空壓の ディヅタル 制御わ 應用, 近代圓書(株) 
  5. 河在賢, 2000, 最新油壓工學, 淸文閣 
  6. Pitch, E. C. and Hong, I. T., 1998, Hydraulic Component Design and Selection, BarDyne Inc. 
  7. Robert Piche, Asko Ellman, Matti Vilenius, 1994, 'Integration of Numerically Stiff Fluid Power Circuit Models Using L-Stable Runge-Kutta Method,' 7th Bath Intl. Fluid Power Workshop 
  8. Kaliafetis, P., Costopoulos, T. and Fameliaris, D., 1995, 'Modeling and Simulation of a Pilot Operated Pressure Relief Valve in Industrial Hydraulics,' Modeling, Identification and Control, pp. 393-396 
  9. Jeong Heon-Sul and Kim Hyoung-Eui, 2002, 'Pressure Control Characteristics of a 2-Way Solenoid Valve Driven by PWM Signal,' Transaction of KSME, A, Vol. 26, No.8, pp. 1565-1576 

이 논문을 인용한 문헌 (2)

  1. Jeong, Heon-Sul ; Kim, Hyoung-Eui 2002. "Pressure Control Characteristics of a 2-Way Solenoid Valve Driven by PWM Signal" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A, 26(8): 1565~1576 
  2. Jeong, H.S. ; Nam, J.W. 2011. "Experimental Analysis of the Static and Dynamic Characteristics for a Pilot Proportional Pressure Control Valve" 유공압시스템학회논문집 = Transactions of the Korea Fluid Power Systems Society, 8(4): 9~16 

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