Journal
COMPUTERS & CHEMICAL ENGINEERING
Volume 154, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compchemeng.2021.107490
Keywords
On-line monitoring; Multiphase batch process; On-line synchronization; Fault detection; Multivariate statistical process control; Penicillin fermentation
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1A2C100550311]
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This paper proposes a real-time synchronization scheme based on relative proceeding rates to reduce synchronization errors and increase the accuracies of state estimation and fault detection. The utility of the proposed method is verified through a case study of industrial penicillin production with a real-time unmeasurable variable.
Because of the inconsistent batch duration, identifying the progress of an ongoing batch highly affects the performance of the on-line monitoring. In this paper, a real-time synchronization scheme is proposed based on relative proceeding rates, newly defined as the time difference between the trajectory of an ongoing batch and the nominal trajectory. As the relative proceeding rate indicates how early the point attains its desired value compared to the nominal trajectory, the synchronized index is obtained online by estimating the relative proceeding rate. Compared with the conventional methods that optimize the synchronized index with local constraints, the proposed method can estimate its distribution using the relative proceeding rate without applying local constraints. It can reduce synchronization errors and increase the accuracies of the state estimation and fault detection. The utility of the proposed method is verified via a case study of industrial penicillin production with a real-time unmeasurable variable. (c) 2021 Elsevier Ltd. All rights reserved.
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