Dynamic and uncertainty are two main features of the industrial process data which should be paid attention when carrying out process datamodeling and analytics. In this paper, the dynamical and uncertain data charac...
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Dynamic and uncertainty are two main features of the industrial process data which should be paid attention when carrying out process datamodeling and analytics. In this paper, the dynamical and uncertain data characteristics are both taken into consideration for the regression modeling purpose. Based on the probabilistic latent variable modeling framework, the linear dynamic system is introduced for incorporation of the dynamicaldata feature. The expectation-maximization Algorithm is introduced for parameter learning of the dynamical probabilistic latent variable model, based on which a new soft sensing scheme is then formulated for online prediction of key/quality variables in the process. An industrial case study illustrates the necessity and effectiveness of introducing the dynamicaldata information into the probabilistic latent variable model.
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