The Greenhouse Environment Control System Study Based On Fuzzy-PID

Greenhouse as a new agricultural planting pattern,has made an outstanding contributions in the utilization of agricultural resources,enhancing the economic benefits of agricultural production..With the-improvement of China's agricultural modernization,greenhouse automation andintelligent control has become the key technologies for achieve greenhouse production information.Greenhouse environmental intelligent control combines with greenhouse production use computer technology and intelligent control technology to avoid the unfavorable factors caused by the external natural climate and provide the most ideal environment for the growth of agricultural crops in the greenhouse,thus forming high efficiency,high yield and excellent quality of modern greenhouse production mode.However,the greenhouse actual production process is often characterized by the specificity and complexity of agriculture.there are many non-linear environmental factorsand the environmental parameters coupled with each other together Therefore,efficient greenhouse environmental control has been one of the key problems of modern greenhouse,which has important study significance.In this study,the research and development of greenhouse environmental control technology are systematically summarized and analyzed.The application of greenhouse environmental control technology is briefly introduced,and the development status of greenhouse control technology at state and abroad is summarized,and presented the inadequate technology in greenhouse environmental control Secondly,the simple PID control technology and fuzzy logic control technology are briefly summarized,and its technical principle and control structure are introduced.Finally,the control strategy of PID control technology and fuzzy logic control technology is put forward,and the controller is designed and simulated by MATLAB.The fuzzy PID control system of the greenhouse environment is controlled by the temperature and humidity in the greenhouse environment,and the improved fuzzy PID control is designed.The improved fuzzy PID control of the hybrid,switch and parameter self-tuning is designed System,simulation results through the SUMULINK environment to achieve.The simulation results showed that compared with single PID control and single fuzzy logic control,the fuzzy PID control system has obvious advantages in system stability and less error,which can effectively suppress the oscillation and overshoot,and the response speed is obvious Ascension.The good control performance and feasibility of fuzzy PID control method in greenhouse environment control were verified.