Double closed-loop optimal control of greenhouse cultivation

Dan Xu, Shangfeng Du*, Gerard van Willigenburg

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

Two time-scale receding horizon optimal control (TTRHOC) of greenhouse cultivation is investigated. Recent developments enable closure of the outer-loop of this control system because they facilitate on-line recomputation of the optimal control of the slow dynamics on a daily basis. This paper quantifies the benefits obtained from having an outer closed-loop that counteracts errors and changes concerning predictions of crop growth, long-term weather, revenues obtained from selling crops and costs to control greenhouse climate. As a special, important case LED lighting is considered which increases both crop growth and profit. Having an outer closed-loop is especially beneficial in this case.

Original languageEnglish
Pages (from-to)90-99
Number of pages10
JournalControl Engineering Practice
Volume85
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • Double closed-loop
  • Greenhouse cultivation
  • LED lighting
  • Optimal control
  • Time-scale decomposition

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