Improved anomaly detection using multi-scale PLS and generalized likelihood ratio test

Muddu Madakyaru, Fouzi Harrou, Ying Sun
2016 2016 IEEE Symposium Series on Computational Intelligence (SSCI)  
Process monitoring has a central role in the process industry to enhance productivity, efficiency, and safety, and to avoid expensive maintenance. In this paper, a statistical approach that exploit the advantages of multiscale PLS models (MSPLS) and those of a generalized likelihood ratio (GLR) test to better detect anomalies is proposed. Specifically, to consider the multivariate and multi-scale nature of process dynamics, a MSPLS algorithm combining PLS and wavelet analysis is used as
more » ... is used as modeling framework. Then, GLR hypothesis testing is applied using the uncorrelated residuals obtained from MSPLS model to improve the anomaly detection abilities of these latent variable based fault detection methods even further. Applications to a simulated distillation column data are used to evaluate the proposed MSPLS-GLR algorithm.
doi:10.1109/ssci.2016.7849880 dblp:conf/ssci/MadakyaruHS16 fatcat:rsnuh2dyjbeijob7q2jbp6ihqa