Home > International Symposium on Advanced Technologies and Management for Innovative Greenhouses: GreenSys2019 > Optimal control of non-smooth greenhouse models

Articles

Optimal control of non-smooth greenhouse models

Article number

1296_17

Pages

125 – 132

Language

English

Abstract

Controlling a greenhouse climate aims at achieving good crop production objectives, while reducing expenses related to energy consumption.
The use of methods based on optimal control theory generally fails to determine a long-term strategy, nor can it handle the gaps between the modeling of the system and its actual behavior.
In keeping with preceding works on receding time horizon, we consider the problem of online determination of the optimal action, for a given state of the system, represented as a Markov decision process.
In a greenhouse, if we make the assumptions that the sources of randomness (weather, observation noise) are independent of the user’s actions, the stochastic problem can be solved numerically by computing deterministic optimal controls for different scenarios of external conditions.
It is for this purpose that we have developed a heuristic method to solve efficiently deterministic optimal control problems, with a long-time horizon and a system discontinuous with respect to the control variables.
This method is illustrated on a greenhouse-crop model based on GreenLab.

Publication

International Symposium on Advanced Technologies and Management for Innovative Greenhouses: GreenSys2019

Authors

A. Della Noce, M. Carrier, P.-H. Cournède

Keywords

greenhouse climate, plant growth model, optimal control, automatic differentiation

Full text

https://doi.org/10.17660/ActaHortic.2020.1296.17

Groups involved

Online Articles (148)

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16. Study of the vertical temperature profile in a tomato greenhouse equipped with lighting, two screens and a VentilationJet system

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17. Optimal control of non-smooth greenhouse models

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A. Grisey | C. Levaillant | D. Martin | V. Stauffer

93. Collecting and storing solar energy for greenhouse heating

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95. Analysis of energy consumption for tomato production in low technology greenhouses of Mexico

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100. Growing media and organic fertilizers affect microbial activities and nutrient availability in soilless horticulture

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104. Evaluation of four soilless substrate systems for greenhouse strawberry production

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107. Coco-peat effluent and organic manure based hydroponics for greenhouse crop cultivation

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108. Effect of salinity application on yield and quality in the hydroponically grown baby-leaf vegetables

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109. Growth and quality response of potted ornamental shrubs under salt stress

110. Comparison of different compost materials for growing strawberry plants

111. Possible use of soluble organic manure for coco-peat grown cucumber (Cucumis sativus)

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113. Translocation and distribution of photosynthates in Japanese and Dutch tomato cultivars with low node-order pinching and high-density planting under salt stress condition

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114. Analysis of water retention capacities of various compost and its relationship to strawberry moisture level

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118. Tipburn occurrence and growth of lettuce as affected by electrical field in a plant factory with artificial light

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119. Cultivar screening: assessment of plant growth, morphology, tipburn occurrence, and quality characteristics of six lettuce cultivars grown in a plant factory

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120. Exploring the possibility to use energy from solar panels to provide artificial light through LEDs in a vertical hydroponic crop of lettuce

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122. Growth, morphology, photosynthetic performance, and energy use efficiency as affected by different combinations of light wavelength in a plant factory with artificial light

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123. Improving lettuce plant growth and preventing tip-burn occurrence by using a multi-fan system in a plant factory

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124. Current developments in greenhouse robotics and challenges for the future

J. Hemming

125. Remote control of greenhouse cucumber production with artificial intelligence – results from the first international autonomous greenhouse challenge

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126. Factors affecting the accuracy and precision of ion-selective electrodes for hydroponic nutrient supply systems

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128. UV-C irradiation after sunset increases control of powdery mildew in strawberries with side-effect on mite populations

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129. Development of an automatic water-stress control system by image analysis for the production of high-quality tomato

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130. Diagnosing for the influence on strawberry growth by EC management using a 3‑D depth sensor

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131. Measurements of environmental parameters inside and outside a greenhouse using open-source software device

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133. Contribution of hyperspectral imaging to monitor water content in soilless growing cucumber crop

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134. Development of LAI and fruit load estimation method using a three-dimensional shape measurement sensor

135. Digital robotic system for grafting vegetable seedlings

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136. New challenges for organic greenhouse horticulture in Sweden

137. Optimizing potassium application in organically-grown high tunnel tomato (Solanum lycopersicum) in the northeastern United States

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138. NLOS-OG: a management tool for nitrogen fertilization in organic greenhouses

139. GREENRESILIENT – applying agroecology to organic greenhouse production

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140. Experimental results of a solar cooling system for greenhouse climate control

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141. Research on performance of active heat storage-release system for canopy warming

142. Innovative greenhouse cultivation in compost barn

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143. Ebb and flood nutrient delivery system for sustainable automated crop production

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144. The risk associated with heavy metals contamination in vegetables growing in urban and peri-urban areas

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145. Does optimized agrochemicals management help to reduce the environmental impact in tomato production? A comparative analysis between greenhouse and open field systems

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146. Use of chitosan-polyacrylic acid (CS-PAA) complex, chitosan-polyvinyl alcohol (CS-PVA) and chitosan hydrogels in greenhouses as a carrier for beneficial elements, nanoparticles, and microorganisms

147. Evaluation of the potential for producing vegetables in screenhouses in Mozambique

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148. Analysis of economic sustainability of tomato greenhouses in Almería (Spain)

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