Abstract
Variational autoencoders have been recently proposed for the problem of process monitoring. While these works show impressive results over classical methods, the proposed monitoring statistics often ignore the inconsistencies in learned lower-dimensional representations and computational limitations in high-dimensional approximations. In this work, we first manifest these issues and then overcome them with a novel statistic formulation that increases out-of-control detection accuracy without compromising computational efficiency. We demonstrate our results on a simulation study with explicit control over latent variations, and a real-life example of image profiles obtained from a hot steel rolling process.
Original language | English (US) |
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Pages (from-to) | 454-473 |
Number of pages | 20 |
Journal | Journal of Quality Technology |
Volume | 53 |
Issue number | 5 |
DOIs | |
State | Published - 2021 |
Keywords
- Deep learning
- high-dimensional nonlinear profile
- latent variable model
- profile monitoring
- variational autoencoder
ASJC Scopus subject areas
- Safety, Risk, Reliability and Quality
- Strategy and Management
- Management Science and Operations Research
- Industrial and Manufacturing Engineering