Journal
INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
Volume 44, Issue 7, Pages 1366-1376Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207721.2012.659708
Keywords
process monitoring; data-driven design approach; batch process; test statistics; kernel density estimation
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Batch processes are characterised by a prescribed processing of raw materials into final products for a finite duration and play an important role in many industrial sectors due to the low-volume and high-value products. Process dynamics and stochastic disturbances are inherent characteristics of batch processes, which cause monitoring of batch processes a challenging problem in practice. To solve this problem, a subspace-aided data-driven approach is presented in this article for batch process monitoring. The advantages of the proposed approach lie in its simple form and its abilities to deal with stochastic disturbances and process dynamics existing in the process. The kernel density estimation, which serves as a non-parametric way of estimating the probability density function, is utilised for threshold calculation. An industrial benchmark of fed-batch penicillin production is finally utilised to verify the effectiveness of the proposed approach.
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