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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 487582, 7 pages
Research Article

Monitoring of Multimode Processes Based on Quality-Related Common Subspace Separation

State Laboratory of Synthesis Automation of Process Industry, Northeastern University, Shenyang, Liaoning 110819, China

Received 5 December 2013; Accepted 16 March 2014; Published 13 April 2014

Academic Editor: Lixian Zhang

Copyright © 2014 Yunpeng Fan 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.


A new monitoring approach for multimode processes based on quality-related common subspace separation is proposed. In the model, the data set forms a larger space when the correlation between process variables and quality variables is considered. And then the whole space is decomposed: quality-related common subspace, quality-related specific subspace, and the residual subspace. Monitoring method is performed in every subspace, respectively. The simulation results show the proposed method is effective.