关键词: 温室, 环境调控, 农业大棚, 模糊控制, 模糊解耦

Abstract:  In order to solve the problem of temperature and humidity control accuracy， speed and stability in agricultural greenhouse during the breeding of “Ruiyu” new variety seedlings in the kiwifruit base， a fuzzy control system of environmental factors suitable for crop growth was designed in this paper by using the glass greenhouse for kiwi seedling cultivation. For the strong coupling law of temperature and humidity in the greenhouse environment, this system added a decoupling algorithm of temperature and humidity to the control. By using the temperature and humidity decoupling parameters to establish the asymmetric temperature and humidity compensation rule base in this system, the output variables of fuzzy control of temperature and humidity and decoupling compensation output were synthesized to obtain the actual temperature and humidity control output, which improved the temperature and humidity control process of agricultural greenhouses and optimized the monitoring effect of greenhouses. Practical data showed that the control accuracy of air temperature, air humidity and light intensity reached ±2℃, ±5%RH and ±200 Lux respectively. At the same time, the time to reach the stable state was 9 min, 16 min and 4 min respectively, and basically remained stability. The practical application showed that this system had high control precision, fast adjustment speed and good robustness, which had a good practical value and promotion value.

Key words: greenhouse； environment control, smart agricultural shed； fuzzy control； fuzzy decoupling