A discussion of challenges related to the modeling and control of greenhouse crop growth, this book presents state-of-the-art answers to those challenges. The authors model the subsystems involved in successful greenhouse control using different techniques and show how the models obtained can be exploited for simulation or control design; they suggest ideas for the development of physical and/or black-box models for this purpose.

Strategies for the control of climate- and irrigation-related variables are brought forward. The uses of PID control and feedforward compensators, both widely used in commercial tools, are summarized. The benefits of advanced control techniquesevent-based, robust, and predictive control, for exampleare used to improve on the performance of those basic methods.

A hierarchical control architecture is developed governed by a high-level multiobjective optimization approach rather than traditional constrained optimization and artificial intelligence techniques. Reference trajectories are found for diurnal and nocturnal temperatures (climate-related setpoints) and electrical conductivity (fertirrigation-related setpoints). The objectives are to maximize profit, fruit quality, and water-use efficiency, these being encouraged by current international rules. Illustrative practical results selected from those obtained in an industrial greenhouse during the last eight years are shown and described. The text of the book is complemented by the use of illustrations, tables and real examples which are helpful in understanding the material.

Modeling and Control of Greenhouse Crop Growth will be of interest to industrial engineers, academic researchers and graduates from agricultural, chemical, and process-control backgrounds.

For the academic researcher: describes the state of the art in greenhouse control summarizing new solutions using advanced control techniques For the industrial food producer: advises improvements to software currently restricted to low-level climate and irrigation aspects of crop growth control For the practitioner: improvements in greenhouse management and crop growth are made plain by real results Includes supplementary material: sn.pub/extras

Inhalt

Introduction.- The Greenhouse Dynamical System.- Climate and Irrigation Control.- Crop Growth Control.- Advice and Suggestions for Greenhouse Technicians and Producers.- Appendix.