Canonical variate residuals-based contribution map for slowly evolving faults

Date

2019-02-23

Advisors

Journal Title

Journal ISSN

ISSN

0959-1524

Volume Title

Publisher

Elsevier

Type

Article

Peer reviewed

Yes

Abstract

The superior performance of canonical variate analysis (CVA) for fault detection has been demonstrated by a number of researchers using simulated and real industrial data. However, applications of CVA to fault identification of industrial processes, especially for faults that evolve slowly, are not widely reported. In order to improve the performance of traditional CVA-based methods to slowly developing faults, a novel diagnostic approach is put forward to implement incipient fault diagnosis for dynamic process monitoring. Traditional CVA fault detection approach is extended to form a new monitoring index based on indices, Hotelling’s T2, Q and a canonical variate residuals (CVR)-based monitoring index Td. As an alternative to the traditional CVA-based contributions, a CVR-based contribution plot method is proposed based on Q and Td statistics. The proposed method is shown to facilitate fault detection by increasing the sensitivity to incipient faults, and aid fault identification by enhancing the contributions from fault- related variables and suppressing the contributions from fault-free variables. The CVR-based method has been demonstrated to outperform traditional CVA-based diagnostic methods for fault detection and identification when validated on slowly evolving faults in a continuous stirred tank reactor (CSTR) system and an industrial centrifugal pump.

Description

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.

Keywords

Condition monitoring, Fault identification, Canonical variable analysis, Slowly evolving faults, Contribution map

Citation

Li, X., Yang, X., Yang, Y., Bennett, I., Collop, A. and Mba, D. (2019) Canonical variate residuals-based contribution map for slowly evolving faults. Journal of Process Control, 76, pp.87-97.

Rights

Research Institute

Institute of Artificial Intelligence (IAI)