Journal of System Simulation ›› 2021, Vol. 33 ›› Issue (4): 792-800.doi: 10.16182/j.issn1004731x.joss.19-0663

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Small Fault Detection Based on Cumulative Sum of Neighbor Statistic

Guo Xiaoping, Gao Jiajun, Guo Jianbin, Li Yuan   

  1. Information Engineering School, Shenyang University of Chemical Technology, Shenyang 110142, China
  • Received:2019-12-20 Revised:2020-05-12 Online:2021-04-18 Published:2021-04-14

Abstract: Aiming at the small faults and the common data non-linear problems of industrial process, a fault detection method based oncumulative sum of neighbor statistic (CUSUM-NS) is proposed. Mutual information principal component analysis (MIPCA) is used to reduce the dimension of training data, and the principal components based on mutual information are extracted to construct a new sample space. For the new sample space after dimensionality reduction, the nonlinear features of the process data can be fully extracted through the distance square sum statistics of k nearest neighbors. Cumulative summation(CUSUM) method is used to accumulate the sum of squares of neighboring distances to capture the small changes in process data. The simulation is conducted through the Tennessee Eastman (TE) process, and the results verify the effectiveness of the proposed method.

Key words: PCA based on mutual information, k-Nearest Neighbor, cumulative sum, small faults

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