Process plant condition monitoring and fault diagnosis

by M a Sharif, R I Grosvenor
Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process Mechanical Engineering ()
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Abstract

The paper reviews current research work in the field of process condition\nmonitoring and fault diagnosis. The review compares and contrasts\nthe applicability and efficiency of different techniques, and concentrates\non methods which monitor the main process variables. From the wide\nrange of methods and process variables, temperature, flowrate and\nliquid level are used here in comparing the limitations and applications\nof each method. The scope of the paper ranges from basic, well established\ntechniques to the latest reported monitoring strategies for each\nof the process variables. Furthermore, the different methods of fault\ndiagnosis deemed to be relevant in process plant are reviewed. The\ndetection of the internal leakage in the control valves and motor\nfaults are discussed in detail, as examples of the monitoring of\nvital process plant components. The paper then outlines areas of\nfuture work, such as the development of a user friendly interface.\nThis interface is based on state transition diagrams (STDs) as well\nas on the use of a knowledge based system (KBS) to model and diagnose\nfaults in vital process plant components such as control valves.

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