Blueberry greenhouse light and temperature coordinated optimization method based on NSGA-II

Abstract

The invention relates to a blueberry greenhouse light and temperature coordinated optimization method based on NSGA-II. The blueberry greenhouse light and temperature coordinated optimization method comprises the following steps that (1), regulation and control time interval division is carried out on a time interval in which light supplement and temperature control are needed in a blueberry greenhouse; (2), an average value of environmental factors in the first five minutes of a unit regulation and control time period is obtained; (3), a greenhouse energy consumption prediction model and a blueberry net photosynthetic rate prediction model are constructed; (4), the maximum net photosynthetic rate of the blueberry crops and the minimum energy consumption of the greenhouse in the unit regulation and control time period are used as optimization objectives, and a greenhouse light and temperature coordinated optimization model is established; (5), the greenhouse light and temperature coordinated optimization model is solved by adopting an NSGA-II multi-objective genetic algorithm; and (6), a light and temperature coordination optimal scheme is selected from the non-inferior solution set by adopting a decision-making method based on optimal benefit improvement. Compared with the prior art, the blueberry greenhouse light and temperature coordinated optimization method based on NSGA-II has the advantages of being reasonable in light supplementing and temperature control time interval division, capable of improving economic benefits of blueberry greenhouse production, high in universality and expansibility and the like, theoretical guidance and decision support are provided for improving the production benefits of the blueberry greenhouse, and high yield and energy conservation of greenhouse blueberry planting are guaranteed.

Description

technical field [0001] The invention relates to the field of optimal control of light and temperature in greenhouses, in particular to a coordinated optimization method for light and temperature in blueberry greenhouses based on NSGA-II. Background technique [0002] Blueberry, also known as lingonberry, is a fresh fruit crop rich in anthocyanins, anthocyanins and other nutrients. It has high nutritional value and medical value. one of food. In recent years, the blueberry market has continued to expand, and the economic benefits are considerable. Blueberry is an annual crop, and its flower and fruit growth period is usually from February to July, during which it needs suitable temperature and sufficient light. A number of studies have shown that temperature and photon flux density have a great impact on blueberry photosynthesis, and photosynthesis provides the most basic carbohydrates for crop growth, which can improve fruit quality and yield. Therefore, in actual greenho...

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Problems solved by technology

[0007] The above two methods have certain practicability, but neither of them fully achieve the coordination of light and temperature, and both of them do not consider the cost of greenhouse production, which will easily lead to the fact that the increased energy consumption in greenhouse production is not used to effectively increase the net photosynthetic rate of crops, resulting in Waste of energy, unable to guarantee the economic benefits of greenhouse production

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