文献类型：期刊文献

英文题名：A probabilistic principal component analysis-based approach in process monitoring and fault diagnosis with application in wastewater treatment plant

作者：Wang, Bei[1,2,3];Li, Zhichao[1];Dai, Zhenwen[3];Lawrence, Neil[3];Yan, Xuefeng[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Adv Control & Optimizat Chem Proc, Shanghai 200237, Peoples R China;[2]Shanghai Elect Windpower Grp, Shanghai, Peoples R China;[3]Univ Sheffield, Dept Comp Sci, Sheffield, S Yorkshire, England

年份：2019

卷号：82

外文期刊名：APPLIED SOFT COMPUTING

收录：;EI(收录号：20192407036926);WOS:【SCI-EXPANDED(收录号:WOS:000484606800049)】；

基金：The authors are grateful for the support of National Natural Science Foundation of China (21878081) and Fundamental Research Funds for the Central Universities under Grant of China (222201917006).

语种：英文

外文关键词：Principle component analysis; Gaussian process; Probabilistic model; Process monitoring; Fault detection

摘要：Probabilistic principal component analysis (PPCA) based approaches have been widely used in the field of process monitoring. However, the traditional PPCA approach is still limited to linear dimensionality reduction. Although the nonlinear projection model of PPCA can be obtained by Gaussian process mapping, the model still lacks robustness and is susceptible to process noise. Therefore, this paper proposes a new nonlinear process monitoring and fault diagnosis approach based on the Bayesian Gaussian latent variable model (Bay-GPLVM). Bay-GPLVM can obtain the posterior distribution rather than point estimation for latent variables, so the model is more robust. Two monitoring statistics corresponding to latent space and residual space are constructed for PM-FD purpose. Further, the cause of fault is analyzed by calculating the gradient value of the variable at the fault point. Compared with several PPCA-based monitoring approaches in theory and practical application, the Bay-GPLVM-based process monitoring approach can better deal with nonlinear processes and show high efficiency in process monitoring. (C) 2019 Elsevier B.V. All rights reserved.