Harvest time prediction for batch processes

Max Peter Spooner*, David Kold, Murat Kulahci

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Batch processes usually exhibit variation in the time at which individual batches are stopped (referred to as the harvest time). Harvest time is based on the occurrence of some criterion and there may be great uncertainty as to when this criterion will be satisfied. This uncertainty increases the difficulty of scheduling downstream operations and results in fewer completed batches per day. A real case study is presented of a bacteria fermentation process. We consider the problem of predicting the harvest time of a batch in advance to reduce variation and improving batch quality. Lasso regression is used to obtain an interpretable model for predicting the harvest time at an early stage in the batch. A novel method for updating the harvest time predictions as a batch progresses is presented, based on information obtained from online alignment using dynamic time warping.
Original languageEnglish
JournalComputers & Chemical Engineering
Volume117
Pages (from-to)32-41
Number of pages10
ISSN0098-1354
DOIs
Publication statusPublished - 2018

Keywords

  • Batch process
  • Dynamic time warping
  • Lasso regression
  • Partial least squares
  • Prediction

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