Vol. 175, Issue 7, July 2014, pp. 44-50

Abstract: The valve plays an important part in the industrial automation system. Whether it operates normally or not relates with the quality of the products directly while its faults are relatively common because of bad working conditions. And the internal leakage is one of the common faults. Consequently, this paper sets up the experimental platform to make the valve in different working condition and collect relevant data online. Then, diagnose the internal leakage of the valve by using the grey correlation analysis method. The results show that this method can not only diagnose the internal leakage of valve accurately, but also distinguish fault degree quantitatively.

Keywords: Control valve, Fault diagnosis, Grey correlation analysis method, Flow characteristic, Internal leakage.

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