SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (6): 981-991.DOI: 10.1016/j.cjche.2014.09.052

• 过程系统工程与过程安全 • 上一篇    下一篇

Adaptive partitioning PCA model for improving fault detection and isolation

Kangling Liu1, Xin Jin1, Zhengshun Fei2, Jun Liang1   

  1. 1 State Key Lab of Industrial Control Technology, Institute of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China;
    2 School of Automation and Electrical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
  • 收稿日期:2014-04-25 修回日期:2014-09-05 出版日期:2015-06-28 发布日期:2015-07-09
  • 通讯作者: Jun Liang
  • 基金资助:

    Support by theNational Natural Science Foundation of China (61174114), the Research Fund for the Doctoral Program of Higher Education in China (20120101130016) and Zhejiang Provincial Science and Technology Planning Projects of China (2014C31019).

Adaptive partitioning PCA model for improving fault detection and isolation

Kangling Liu1, Xin Jin1, Zhengshun Fei2, Jun Liang1   

  1. 1 State Key Lab of Industrial Control Technology, Institute of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China;
    2 School of Automation and Electrical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
  • Received:2014-04-25 Revised:2014-09-05 Online:2015-06-28 Published:2015-07-09
  • Contact: Jun Liang
  • Supported by:

    Support by theNational Natural Science Foundation of China (61174114), the Research Fund for the Doctoral Program of Higher Education in China (20120101130016) and Zhejiang Provincial Science and Technology Planning Projects of China (2014C31019).

摘要: In chemical process, a large number of measured andmanipulated variables are highly correlated. Principal component analysis (PCA) iswidely applied as a dimension reduction technique for capturing strong correlation underlying in the process measurements. However, it is difficult for PCA based fault detection results to be interpreted physically and to provide support for isolation. Some approaches incorporating process knowledge are developed, but the information is always shortage and deficient in practice. Therefore, this work proposes an adaptive partitioning PCA algorithm entirely based on operation data. The process feature space is partitioned into several sub-feature spaces. Constructed sub-block models can not only reflect the local behavior of process change, namely to grasp the intrinsic local information underlying the process changes, but also improve the fault detection and isolation through the combination of local fault detection results and reduction of smearing effect. The method is demonstrated in TE process, and the results show that the new method is much better in fault detection and isolation compared to conventional PCA method.

关键词: Adaptive partitioning, Fault detection, Fault isolation, Principal component analysis

Abstract: In chemical process, a large number of measured andmanipulated variables are highly correlated. Principal component analysis (PCA) iswidely applied as a dimension reduction technique for capturing strong correlation underlying in the process measurements. However, it is difficult for PCA based fault detection results to be interpreted physically and to provide support for isolation. Some approaches incorporating process knowledge are developed, but the information is always shortage and deficient in practice. Therefore, this work proposes an adaptive partitioning PCA algorithm entirely based on operation data. The process feature space is partitioned into several sub-feature spaces. Constructed sub-block models can not only reflect the local behavior of process change, namely to grasp the intrinsic local information underlying the process changes, but also improve the fault detection and isolation through the combination of local fault detection results and reduction of smearing effect. The method is demonstrated in TE process, and the results show that the new method is much better in fault detection and isolation compared to conventional PCA method.

Key words: Adaptive partitioning, Fault detection, Fault isolation, Principal component analysis