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Development of an unconventional electro-hydraulic proportional valve with fuzzy-logic controller for hydraulic presses

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Abstract

In this study, an unconventional electro-hydraulic proportional flow control valve based on a switching solenoid and a fuzzy-logic controller is proposed for application to hydraulic presses. The main purpose of this study is the attempt to develop an electro-hydraulic proportional flow control valve with lowest cost. Since the switching solenoid possesses quite nonlinear force/stroke characteristics, it is basically not suitable for the development of hydraulic proportional valves. Therefore, the fuzzy-logic controller is employed to linearize the force/stroke characteristics. The basic idea is the utilization of the numerically estimated pseudo-force as the feedback signal. Finally, this newly developed electro-hydraulic proportional flow control valve is installed in a hydraulic press. Experimental results show that the control of the ram velocity of the press cylinder using the proposed electro-hydraulic proportional flow control valve is quite successful.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Yunlin University of Science and Technology, 123, University Road, Sec. 3, Touliu, Yunlin, 640, Taiwan

    J.-C. Renn & C. Tsai

Authors
  1. J.-C. Renn
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  2. C. Tsai
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Renn, JC., Tsai, C. Development of an unconventional electro-hydraulic proportional valve with fuzzy-logic controller for hydraulic presses. Int J Adv Manuf Technol 26, 10–16 (2005). https://doi.org/10.1007/s00170-003-1973-7

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  • DOI: https://doi.org/10.1007/s00170-003-1973-7

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