Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 533971
Title Adaptive two time-scale receding horizon optimal control for greenhouse lettuce cultivation
Author(s) Xu, Dan; Du, Shangfeng; Willigenburg, Gerard van
Source Computers and Electronics in Agriculture 146 (2018). - ISSN 0168-1699 - p. 93 - 103.
DOI https://doi.org/10.1016/j.compag.2018.02.001
Department(s) Biometris (WU MAT)
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Adaptive control - Greenhouse cultivation - Receding horizon optimal control - Time-scale decomposition
Abstract A two time-scale, receding horizon, optimal controller for greenhouse lettuce cultivation is extended with on-line parameter estimation to handle ill-known or time-varying parameters of the greenhouse-crop model. By means of simulations, the possible improvement of performance and reduction of constraint violation, introduced by this extension, are investigated. Moreover, uncommon issues in the adaptive controller design due to the two time-scales are considered and handled in this paper. The estimated parameters are selected based on their uncertainty and performance sensitivity. Using a recently developed very efficient algorithm, the selected parameters are checked for identifiability first. Finally the possibility of real-time implementation of the adaptive two time-scale receding horizon optimal controller is investigated.
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