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http://dx.doi.org/10.7839/ksfc.2018.15.1.001

A Study on the Phase Bandwidth Frequency of a Directional Control Valve based on the Metering Orifice  

Kim, Sungdong (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
Jeon, Sehyeong (Innotems Co. LTD.)
Yun, Jooseop (Construction Equipment R&D Group, Korea Institute of Industrial Technology)
Publication Information
Journal of Drive and Control / v.15, no.1, 2018 , pp. 1-9 More about this Journal
Abstract
The spool displacement of directional control valve can be considered as the standard signal to measure the bandwidth frequency of a directional control valve. When the spool displacement is not available, the metering-orifice system is implemented in this research as an alternative way of measuring the 90 degrees phase bandwidth frequency of the hydraulic directional control valve. The inertia effect on the transmission line oil induces the phase lead of the valve load pressure when compared with the phase of spool displacement. The capacitance effect of the oil induces the phase lag of the valve load pressure. The phase of the load pressure can be adjusted to be the same as that of the spool displacement by controlling the opening area of the metering orifice. A series of experiments were conducted to verify the effectiveness of the metering orifice. The 90 degrees phase bandwidth frequency measured from the valve load pressure was significantly deviated in some cases from the frequency of the spool displacement. The metering orifice was hard to be applied to measure the -90 degrees phase bandwidth frequency of the high precision.
Keywords
Bandwidth Frequency; Metering Orifice; Phase Angle; Directional Control Valve; Transmission Line;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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