Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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A Study on the Bandwidth Frequency of Directional Control Valves based on the Amplitude of the Metering-Orifice Pressure

미터링 오리피스 압력 진폭을 이용한 방향제어밸브 대역폭 주파수에 관한 연구

  • Kim, Sungdong (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Jeon, Sehyeong (Innotems Co. LTD.) ;
  • Shin, Daeyoung (Construction Machinery Group, Korea Institute of Industrial Technology)
  • Received : 2017.02.24
  • Accepted : 2017.03.03
  • Published : 2017.06.01
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Abstract

The spool displacement of a directional control valve can be considered as the standard signal for the measurement of its bandwidth frequency. When the spool displacement is not available, the metering-orifice system is suggested in this study as an alternative way to measure the - 3 dB amplitude-ratio bandwidth frequency of the hydraulic directional-control valve. The amplitude ratio of the metering-orifice pressure can be adjusted to equal that of the spool displacement through the controlling of the metering-orifice opening area. A series of experiments were conducted to verify the effectiveness of the metering-orifice system. The metering orifice was confirmed as adequate for the measurement of the - 3 dB amplitude-ratio bandwidth frequency.

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References

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