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Journal of Control Science and Engineering
Volume 2018, Article ID 5127505, 16 pages
Research Article

An Integrated FDD Approach for an Intensified HEX/Reactor

1Electrical Engineering School, Guizhou University, Guiyang 550025, China
2CNRS, LGC, 31030 Toulouse, France
3LGC, Université de Toulouse, UPS, 31030 Toulouse, France
4CNRS, LAAS, 31400 Toulouse, France
5LAAS, Université de Toulouse, UPS, 31400 Toulouse, France

Correspondence should be addressed to Ze-tao Li; moc.361@tzlygzg

Received 21 August 2017; Revised 15 November 2017; Accepted 23 November 2017; Published 14 January 2018

Academic Editor: Ai-Guo Wu

Copyright © 2018 Mei Zhang et al. 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.


In this paper, a fault detection and diagnosis (FDD) scheme is developed for a class of intensified HEX/reactor, in which faults caused by sensor, actuator, and process are taken into account in the unified framework. By considering overall heat transfer coefficient as a function of fouling and fluid flow rate, a dynamic model which is capable of identifying these two faults simultaneously is derived. Sensor measurements, together with estimation by adaptive high gain observers, are processed, aimed at identifying sensor faults and providing adequate estimation to substitute faulty measurements. Then reliable measurements are fed to several banks of interval filters to generate several banks of residuals; each bank of residuals is sensitive to a particular process parameter/actuator. By evaluating these residuals, process/actuator fault isolation and identification are achieved. The proposed strategy is applied to actual data retrieved from a new intensified heat exchanger reactor. Simulation results confirm the applicability and robustness of the proposed methodology.