Fault detection in processes represented by PLS models using an EWMA control scheme

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fault detection is important for effective and safe process operation. Partial least squares (PLS) has been used successfully in fault detection for multivariate processes with highly correlated variables. However, the conventional PLS-based detection metrics, such as the Hotelling's T2 and the Q statistics are not well suited to detect small faults because they only use information about the process in the most recent observation. Exponentially weighed moving average (EWMA), however, has been shown to be more sensitive to small shifts in the mean of process variables. In this paper, a PLS-based EWMA fault detection method is proposed for monitoring processes represented by PLS models. The performance of the proposed method is compared with that of the traditional PLS-based fault detection method through a simulated example involving various fault scenarios that could be encountered in real processes. The simulation results clearly show the effectiveness of the proposed method over the conventional PLS method.

Original languageEnglish
Title of host publicationInternational Conference on Control, Decision and Information Technologies, CoDIT 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages152-157
Number of pages6
DOIs
Publication statusPublished - 18 Oct 2016
Event3rd International Conference on Control, Decision and Information Technologies, CoDIT 2016 - Saint Julian's, Malta
Duration: 6 Apr 20168 Apr 2016

Other

Other3rd International Conference on Control, Decision and Information Technologies, CoDIT 2016
CountryMalta
CitySaint Julian's
Period6/4/168/4/16

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Keywords

  • Databased fault detection
  • EWMA
  • Mean shift
  • Partial least squares
  • Process monitoring

ASJC Scopus subject areas

  • Decision Sciences (miscellaneous)
  • Control and Optimization
  • Computer Science Applications
  • Information Systems

Cite this

Harrou, F., Nounou, M., & Nounou, H. (2016). Fault detection in processes represented by PLS models using an EWMA control scheme. In International Conference on Control, Decision and Information Technologies, CoDIT 2016 (pp. 152-157). [7593552] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CoDIT.2016.7593552