Journal of System Simulation ›› 2023, Vol. 35 ›› Issue (1): 95-109.doi: 10.16182/j.issn1004731x.joss.21-0689

• Papers • Previous Articles     Next Articles

kNN Fault Detection Based on Reconstruction Error and Multi-block Modeling Strategy

Jing Zheng1,2(), Weili Xiong1,2(), Xiaodong Wu1,2   

  1. 1.China Key Laboratory of Advanced Process Control for Light Industry Ministry of Education, Jiangnan University, Wuxi 214122, China
    2.School of the Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
  • Received:2021-07-15 Revised:2021-10-02 Online:2023-01-30 Published:2023-01-18
  • Contact: Weili Xiong E-mail:zhengjing7928@163.com;greenpre@163.com

Abstract:

For the fault monitoring algorithm based on k-nearest neighbor (kNN), the abnormal information that caused the fault is easy to be overwhelmed by the normal operating condition information, which leads to the problem of untimely fault detection and low alarm rate. A kNN fault monitoring method based on reconstruction error is proposed using auto-encoder and multi-block modeling strategy. The method uses the normal working condition data set to train the auto-encoder model, and extracts the reconstruction error based on the model to solve the problem that abnormal information is easy to be overwhelmed. Further considering the fault characteristics such as micro-offset and oscillation, a multi-block modeling strategy is adopted to calculate statistics for each sub-block and merge the detection. Through a numerical example and Tennessee-Eastman (Tennessee-Eastman, TE) process simulation and analysis, the results verify the effectiveness of the proposed method and the improvement of monitoring performance.

Key words: k-nearest neighbor(kNN), reconstruction error, fault detection, information extraction, multi-block modeling

CLC Number: