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International Journal of Rotating Machinery
Volume 2013 (2013), Article ID 189359, 11 pages
http://dx.doi.org/10.1155/2013/189359
Research Article

Application of a Fault Detection and Isolation System on a Rotary Machine

D.I.I., Università Politecnica delle Marche, Ancona, Italy

Received 30 June 2012; Revised 7 January 2013; Accepted 9 January 2013

Academic Editor: Zhaoye Qin

Copyright © 2013 Silvia M. Zanoli and Giacomo Astolfi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The paper illustrates the design and the implementation of a Fault Detection and Isolation (FDI) system to a rotary machine like a multishaft centrifugal compressor. A model-free approach, that is, the Principal Component Analysis (PCA), has been employed to solve the fault detection issue. For the fault isolation purpose structured residuals have been adopted while an adaptive threshold has been designed in order to detect and to isolate the faults. To prove the goodness of the proposed FDI system, historical data of a nitrogen centrifugal compressor employed in a refinery plant are considered. Tests results show that detection and isolation of single as well as multiple faults are successfully achieved.