Combined indices for ICA and their applications to multivariate process fault diagnosis

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Original languageEnglish
Pages (from-to)494-501
Journal / Publication自动化学报/Acta Automatica Sinica
Issue number5
Publication statusPublished - May 2013
Externally publishedYes


As a development of principal component analysis (PCA) and factor analysis (FA), independent component analysis (ICA) has been applied effectively to multivariate process monitoring and fault diagnosis and has got many excellent achievements. Usually, ICA has three indices for monitoring and diagnosis, i.e., I2, Ie2, and SPE, and the multi-indexes make the monitoring and diagnosis inconvenient and also decentralizes the fault influence. In this paper, two combined indices for ICA are developed, both of which are weighted sums of the three indices. The statistics and physical meanings of all indices are analyzed and compared. Based on the simulation tests on a numerical example and TE process, the proposed combined indices have some advantages compared with the traditional multi-indices. Copyright © 2013 Acta Automatica Sinica. All rights reserved.

Research Area(s)

  • Combined index, Fault diagnosis, Independent component analysis, Multivariate process