TY - JOUR
T1 - Adaptive two time-scale receding horizon optimal control for greenhouse lettuce cultivation
AU - Xu, Dan
AU - Du, Shangfeng
AU - van Willigenburg, Gerard
PY - 2018/3/1
Y1 - 2018/3/1
N2 - 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.
AB - 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.
KW - Adaptive control
KW - Greenhouse cultivation
KW - Receding horizon optimal control
KW - Time-scale decomposition
U2 - 10.1016/j.compag.2018.02.001
DO - 10.1016/j.compag.2018.02.001
M3 - Article
AN - SCOPUS:85041512111
SN - 0168-1699
VL - 146
SP - 93
EP - 103
JO - Computers and Electronics in Agriculture
JF - Computers and Electronics in Agriculture
ER -