Application of fuzzy control in solar automatic irrigation system

ZHU Hailong，WU Kaihua，ZHAO Weijie
（College of Life Information Science and Instrument Engineering，
Hangzhou Dianzi University，Hangzhou 310018，China）

Abstract： According to crop water demand， the implementation of timely and appropriate automatic irrigation is an important method to improve agricultural water use efficiency and increase crop yields.In order to solve the problem of timely and appropriate irrigation， a fuzzy controlled solar automatic irrigation system for tea trees was designed By detecting actual soil temperature and moisture of the tea tree garden， and comparing with the optimal humidity of the growth of tea trees，taking  the deviation and its change rate as  the inputs, according to the fuzzy control rules established in the actual process of agricultural irrigation， automatic watersaving irrigation for the tea tree garden was achieved Finally， simulation results in Matlab show that the system time constant is 15 seconds The system is stable， and the response time meets the actual irrigation requirements
Key words： solar energy automatic irrigation; fuzzy control; time constant