드라이브 ㆍ 컨트롤 (Journal of Drive and Control)

  • 제14권2호
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  • Pages.1-8
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  • 2017
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  • 2671-7972(pISSN)
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  • 2671-7980(eISSN)
유공압건설기계학회 (The Korean Society for Fluid Power and Construction Equipment)
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미터링 오리피스 압력 진폭을 이용한 방향제어밸브 대역폭 주파수에 관한 연구

A Study on the Bandwidth Frequency of Directional Control Valves based on the Amplitude of the Metering-Orifice Pressure

  • 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)
  • 투고 : 2017.02.24
  • 심사 : 2017.03.03
  • 발행 : 2017.06.01
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초록

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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참고문헌

  1. ISO 10770-1 Hydraulic fluid power - Electrically modulated hydraulic control valves - Part 1: Test methods for four-way directional flow control valves. 1998.
  2. William J. Thayer, "Specification Standards for Electrohydraulic Flow Control Servo valves, Moog Technical Bulletin 117", Moog Inc. Control Division, 1962.
  3. Robert A. Nasca, "Testing Fluid Power Components", Industrial Press Inc. (New York USA), ISBN 0-8311-3002-4, pp212-240, 1990.
  4. KS B 6511 Test methods for electro - hydraulic proportional directional series flow control valves. 2011.
  5. Sungdong Kim, Wen-Long An and Sehyeong Jeon, "Study on Bandwidth Frequency of Servovalve based on Metering Cylinder", Journal of Drive and Control, Vol.12 No.3 pp.44-51 Sep. 2015. https://doi.org/10.7839/ksfc.2015.12.3.044
  6. Herbert E. Merritt, "Hydraulic Control Systems", John Wiley &Sons, Inc. (New York USA), ISBN 0 471 59617 5, pp289-290, 1967.
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  8. K. Ogata, Modern Control Engineering, Prentice-Hall, Inc., Englewood Cliffs, N.J., 1970.