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Utilizing big data for batch process modeling and control
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DOI：10.1016/j.compeleceng.2018.09.017.png)
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This manuscript illustrates the use of big data for modeling and control of batch processes. A modeling and control framework is presented that utilizes data variety (temperature or concentration measurements along with size distribution) to achieve newer control objectives. For an illustrative crystallization process, an approach is proposed consisting of a subspace state-space model augmented with a linear quality model, able to model and predict, and therefore control the particle size distribution (PSD). The identified model is deployed in a linear model predictive control (MPC) with explicit model validity constraints. The paper presents two formulations: (a) one that minimizes the volume of fines in the product by leveraging the variety of measurements and (b) the other that directly controls the shape of the particle size distribution in the product. The former case is compared to traditional control practice while the latter's superior ability to achieve desired PSD shape is demonstrated. (C) 2018 Elsevier Ltd. All rights reserved.
Keyword:
Batch process
Subspace identification
Model predictive control
Big-data
Data driven model predictive control
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