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溫室藍莓光溫協(xié)調(diào)優(yōu)化模型與控制策略研究
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上海市科委創(chuàng)新行動計劃項目(17391900900)和國家自然科學基金項目(61973337)


Optimal Model of Blueberry Greenhouse Light and Temperature Coordination
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    摘要:

    針對目前溫室光溫調(diào)控目標值優(yōu)化未綜合考慮提升作物凈光合速率和生產(chǎn)效益的問題,基于NSGA-Ⅱ多目標遺傳算法進行光溫協(xié)調(diào)優(yōu)化模型研究。分別建立藍莓光溫耦合凈光合速率模型與Venlo型溫室夏季降溫補光能耗模型,采用粒子群算法(Particle swarm optimization,PSO)進行參數(shù)辨識與驗證分析,得到較為準確的目標函數(shù)模型;以藍莓凈光合速率最大、Venlo型溫室降溫能耗最小為優(yōu)化目標,采用NSGA-Ⅱ算法對光溫協(xié)調(diào)優(yōu)化模型進行模擬尋優(yōu),得到Pareto最優(yōu)解集。為進一步驗證優(yōu)化效果,對最優(yōu)解集采取不同選取策略,分別與優(yōu)化前作對比。結(jié)果顯示,在維持藍莓光合速率基本不變的情況下可降耗約21.3%;在優(yōu)先考慮種植效益的前提下,可在降耗86%的同時平均增加光合速率約28.9%。研究結(jié)果可為考慮作物光合提升與降耗綜合目標的溫室藍莓光溫協(xié)調(diào)優(yōu)化模型與控制策略選取提供理論基礎(chǔ)。

    Abstract:

    Photosynthesis directly affects the quality and growth of blueberries, and the rate of crop photons is mainly influenced by temperature and photon yield density. At present, most greenhouse control did not consider the coordination of light temperature, and the actual energy consumption of greenhouses, not only resulting in meaningless waste of energy, but also creating a greenhouse small-climate environment which reduced the efficiency of blueberry photosynthesis. In order to solve the above problems, considering the photosynthemum and greenhouse cooling energy consumption during the spring and summer when blueberry was in flower fruit period, and the temperature and lighting control value of greenhouse were optimized by multi-target optimization algorithm. Firstly, the blueberry photosynthing rate model with temperature correction was established, which was based on the results of the temperature and photon pass density nesting test. Using a right-angled bi-curve correction model with temperature correction to model the blueberry photosynthetic rate. The model fitting results had a coefficient of determination (R2) of 0.9836, an average square root error of 0.5701μmol/(m2·s), and an average relative error of 3.86%, which can better reflect the relationship between blueberry photosynthing rate and temperature and light. Then a greenhouse energy consumption model was established, and the optimal solution of Pareto was solved by using NSGA-Ⅱ multi-objective optimization algorithm with greater net photosynthing rate and energy saving as the optimization goal. In order to further illustrate the optimization effect, different selection strategies were adopted for the optimization solution, which can reduce the energy consumption by about 21.3% while maintaining the photosynthetic rate of blueberries basically unchanged;under the premise of giving priority to planting benefits, the energy consumption can be reduced by 8.6% while the average increase of the photosynthetic rate by about 28.9%. The results can provide a theoretical basis for analyzing the physiological characteristics of crops and optimizing the greenhouse light temperature regulation setting. Greenhouse decision makers or control algorithms can use this method to set greenhouse temperature, light regulation settings. At the same time, the research method can also be applied to the setting value optimization of other crops which missing yield models in greenhouse production.

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徐立鴻,徐赫,蔚瑞華.溫室藍莓光溫協(xié)調(diào)優(yōu)化模型與控制策略研究[J].農(nóng)業(yè)機械學報,2022,53(1):360-369. XU Lihong, XU He, WEI Ruihua. Optimal Model of Blueberry Greenhouse Light and Temperature Coordination[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(1):360-369.

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  • 收稿日期:2021-01-25
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  • 在線發(fā)布日期: 2022-01-10
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