DEVELOPMENT OF A HIGH-SPEED ON/OFF DIGITAL VALVE FOR HYDRAULIC CONTROL SYSTEMS USING A MULTILAYERED PZT ACTUATOR

Authors

  • Hironao Yamada Department of Mechanical Engineering, Gifu University, 1-1 Yanagido, Gifu 501-11, Japan
  • Guy Wennmacher Liebherr Aerospace Lindenberg GmbH, Abt. T/ORG, Pfänderstr. 50-52, Germany
  • Takayoshi Muto Department of Mechanical Engineering, Gifu University, 1-1 Yanagido, Gifu 501-11, Japan
  • Yoshikazu Suematsu Department of Electronic-Mechanical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-01, Japan

Keywords:

hydraulic actuator, piezo-element, digital control, PWM control, digital valve

Abstract

In this study, a high-speed on/off digital valve was developed for use in a hydraulic control system. The device basi-cally consists of a poppet valve acting as the main valve, and a multilayered piezoelectric (PZT) actuator for driving the poppet valve. A hydraulic amplifier was adopted to increase the actuation of the PZT actuator to the poppet valve. A compensation mechanism was set up to reduce this temperature effect in the hydraulic actuation of the PZT actuator. This problem arises when the oil temperature increases and causes the valve displacement to fluctuate slightly.

The static and dynamic characteristics of the device were investigated by experiment and computer simulation. As a result, it was found that the switching time of the valve is less than 0.7 ms. Moreover, the valve can be driven by a PWM carrier wave using frequencies of up to 500 Hz. Additionally, the validity of the temperature compensation mechanism was confirmed. Hence, this valve may be determined as feasible device to be used in hydraulic systems.

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Author Biographies

Hironao Yamada, Department of Mechanical Engineering, Gifu University, 1-1 Yanagido, Gifu 501-11, Japan

HIRONAO YAMADA (Born October 02, 1962) received the Doctor of Engineering degree from the Nagoya University Japan, in 1991. From 1991 to 1994, he worked in Nagoya University. From 1992 to 1993, he was a Visiting Research Fellow at the Aachen Institute of Technology, Germany. He is currently an Associate Professor in the department of mechanical and systems engi-neering, Gifu University.

Guy Wennmacher, Liebherr Aerospace Lindenberg GmbH, Abt. T/ORG, Pfänderstr. 50-52, Germany

GUY WENNMACHER (Born July 09, 1964). Luxemburgish citizen-ship, grown up in Germany, Engineering studys in Aachen (-1990), Doctorate in Hy-draulics at IHP / RWTH Aachen 1995. 3 years working in the field of industrial hydraulics in Luxembourg (developing of components and systems for hydraulic presses and other appli-cations). 1997 return to Germany to Liebherr-Aerospace Lindenberg working in the field of flight controls actuation. Since 1.1.2000 head of Actuation Systems product branch.

Takayoshi Muto, Department of Mechanical Engineering, Gifu University, 1-1 Yanagido, Gifu 501-11, Japan

TAKAYOSHI MUTO (Born March 31, 1941) received the Doctor of Engineering degree from the Nagoya Universi-ty, in 1972. From 1963 to 1972, he worked in the department of mechanical engineering, Nagoya University. From 1981 to 1982, he was a Visiting Research Fellow at the Aachen Institute of Technology, Germany. He is currently a Professor in the department of mechanical and systems engineering, Gifu University.

Yoshikazu Suematsu, Department of Electronic-Mechanical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-01, Japan

YOSHIKAZU SUEMATSU (Born October 24, 1943) received Doctor of Engineering degree from the Nagoya Universi-ty, in 1972. From 1970 to 1988, he worked in the department of mechanical engineering, Nagoya University. He is currently a Professor in the department of electronic mechanical engineering, school of engineering of Nagoya University.

References

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Merritt, H. E. 1967. Hydraulic Control Systems. John Wiley & Sons, Inc..

Tanaka, H. 1984. Study of a fast switching solenoid valve. Trans. Jpn. Soc. Mech. Eng., Vol. 50, No. 457, C, p. 1594...

Wennmacher, G. and Yamada, H. 1993. Prototyp eines dynamischen Schnellschaltventiles mit piezoelektrischer Ansteuerung. Ölhydraulik und Pneu-matik, Vol. 37, No. 10, p. 794...

Ye, N.; Scavarda, S.; Betemps, M. and Jutard, A. 1992. Models of Pneumatic PWM Solenoid Valve for Engineering Applications. ASME Journal of Dynamic Systems, Measurement and Control, Vol. 114, p. 680...

Yokota, S. and Nio, K. 1990. Fast-Acting Electrohy-draulic Digital Transducer. Trans. Jpn. Soc. Mech. Eng., Vol. 56, No. 524, B, p. 1167...

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Published

2000-10-01

How to Cite

Yamada, H., Wennmacher, G., Muto, T., & Suematsu, Y. (2000). DEVELOPMENT OF A HIGH-SPEED ON/OFF DIGITAL VALVE FOR HYDRAULIC CONTROL SYSTEMS USING A MULTILAYERED PZT ACTUATOR. International Journal of Fluid Power, 1(2), 5–10. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/647

Issue

2000: Vol 01 Iss 2

Section

Original Article