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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27132


    Title: ADAPTIVE FLOW-RATE CONTROL OF A HYDRAULIC PROPORTIONAL VALVE
    Authors: LAI,JY;CHEN,YR
    Contributors: 機械工程學系
    Keywords: TIME-DELAY;SYSTEMS
    Date: 1992
    Issue Date: 2010-06-29 18:08:34 (UTC+8)
    Publisher: 中央大學
    Abstract: The use of hydraulic proportional valves in industry is becoming increasingly popular as they have better performance than conventional on-off valves and lower cost than servovalves. However, due to significant time delay in valve dynamics, they are currently used for low-accuracy and low-dynamics applications. In this study, an adaptive self-tuning controller is proposed to enable a hydraulic proportional valve to achieve accurate set-point flow rate control. A moving model which reduces the system order and hence reduces the identification effort was used for the controller design. The controller is based on the pole-placement technique which shifts the dominant pole to the desired location. In addition, a predictor has been proposed to overcome the effect of the time delay. Experimental results have shown that the proposed self-tuning controller is better than the conventional PI controller as both transient oscillation and steady-state error shown in the PI control have been significantly reduced. Also, the performance of the closed-loop system is very robust as the system response remains the same under various operating conditions.
    Relation: JSME INTERNATIONAL JOURNAL SERIES III-VIBRATION CONTROL ENGINEERING ENGINEERING FOR INDUSTRY
    Appears in Collections:[機械工程研究所] 期刊論文

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