An Experimental Study on Diagnosis of Operating Characteristics in Pneumatic Control Valve.

概要

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This paper describes the study on diagnostic algorithm of pneumatic control valve, which is one of the final control elements in process control. In order to diagnose operating characteristics of pneumatic control valve in process by measuring actuator pressure and valve stem displacement, it is necessary to reconsider stem thrust model. So we consider the model which is available for online diagnosis based on experiment.In this paper we show the stem thrust model which was obtained in this study and experimental results of the diagnostic algorithm using the stem thrust model. And additionally we show the algorithm for detection of the abnormal operating condition caused by stick-slip which cannot be detected using the stem thrust model.
公益社団法人計測自動制御学会の論文