On unifying multiblock analysis with application to decentralized process monitoring

被引:319
作者
Qin, SJ [1 ]
Valle, S
Piovoso, MJ
机构
[1] Univ Texas, Dept Chem Engn, Austin, TX 78712 USA
[2] Dupont Co Inc, Cent Res & Dev, Cent Sci & Engn Expt Stn, Wilmington, DE 19880 USA
关键词
consensus PCA; multiblock PCA; multiblock PLS; decentralized process monitoring; contribution plots;
D O I
10.1002/cem.667
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Westerhuis et al. (J. Chemometrics 1998; 12: 301-321) show that the scores of consensus PCA and multiblock PLS (Westerhuis and Coenegracht, J. Chemometrics 1997; 11: 379-392) can be calculated directly from the regular PCA and PLS scores respectively. In this paper we show that both the loadings and scores of consensus PCA can be calculated directly from those of regular PCA, and the multiblock PLS loadings, weights and scores can be calculated directly from those of regular PLS. The orthogonal properties of four multiblock PCA and PLS algorithms are explored. The use of multiblock PCA and PLS for decentralized monitoring and diagnosis is derived in terms of regular PCA and PLS scores and residuals. While the multiblock analysis algorithms are basically equivalent to regular PCA and PLS, blocking of process variables in a large-scale plant based on process knowledge helps to localize the root cause of the fault in a decentralized manner. New definitions of block and variable contributions to SPE and T-2 are proposed for decentralized monitoring. This decentralized monitoring method based on proper variable blocking is successfully applied to an industrial polyester film process. Copyright (C) 2001 John Wiley & Sons, Ltd.
引用
收藏
页码:715 / 742
页数:28
相关论文
共 28 条
[11]   PROCESS MONITORING AND DIAGNOSIS BY MULTIBLOCK PLS METHODS [J].
MACGREGOR, JF ;
JAECKLE, C ;
KIPARISSIDES, C ;
KOUTOUDI, M .
AICHE JOURNAL, 1994, 40 (05) :826-838
[12]   UNIFORM-DISTRIBUTION ON A STIEFEL MANIFOLD [J].
MARDIA, KV ;
KHATRI, CG .
JOURNAL OF MULTIVARIATE ANALYSIS, 1977, 7 (03) :468-473
[13]  
MILLER P, 1993, P FALL C ASQC ASA MI
[14]  
MILLER SM, 1993, THESIS U TEXAS AUSTI
[15]  
MISRA M, 1999, P AICHE ANN M DALL T
[17]   MULTIVARIATE SPC CHARTS FOR MONITORING BATCH PROCESSES [J].
NOMIKOS, P ;
MACGREGOR, JF .
TECHNOMETRICS, 1995, 37 (01) :41-59
[18]  
Qin SJ, 1998, COMPUT CHEM ENG, V22, P503, DOI 10.1016/S0098-1354(97)00262-7
[19]  
SLAMA CF, 1991, MULTIVARIATE STAT AN
[20]  
Wangen L.E., 1989, Journal of chemometrics, V3, P3, DOI DOI 10.1002/CEM.1180030104