Journal of System Simulation ›› 2017, Vol. 29 ›› Issue (7): 1506-1513.doi: 10.16182/j.issn1004731x.joss.201707015

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Application of Weighted Dynamic SVDD in Nonlinear Process Monitoring

Xie Yanhong1, Sun Chengao2, Li Yuan2   

  1. 1. Department of Science Shenyang University of Chemical Technology, Shenyang 110142, China;
    2. College of Information Engineering Shenyang University of Chemical Technology, Shenyang 110142, China
  • Received:2015-09-07 Published:2020-06-01

Abstract: Due to the complexity of the chemical process, the data are often characterized by dynamics and correlation between sequences. Traditional support vector data description (SVDD) methods are difficult to guarantee real-time monitoring online. A Weighted-Dynamic-SVDD (WDSVDD) method was proposed to monitor fault in real time online. The dynamic method was introduced, and the correlation between the data was considered. The weighted information was used to highlight the useful information. The model was established by using SVDD method, and the online real-time fault monitoring was realized. The method not only overcomes the adverse effect of non-Gaussian and nonlinearity, but also considers dynamic characteristics and correlation between sequences of the processing data. Applications in the numerical simulation and TE process instance verify the effectiveness of the proposed method.

Key words: faulty monitoring, dynamic, SVDD (support vector data description), chemical process

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