Development of Automated Irrigation System for Production Field : Fuzzy Timer Control

Abstract

The aim of this research is to develop an automation system for irrigation to be implemented on existing irrigation facility. A fuzzy timer control (FTC) technique was developed for application in water level control. FTC is the modification of the original fuzzy logic control (FLC) which have been widely known and been applied in various control systems. The FTC was applied in simulation using water balance analysis of weather, evapotranspiration and land condition information. Simulation was conducted for dry season and rainy season, using weather data input as disturbance to the system. The set point was chosen based on the water level in the irrigation practice used in SRI cultivation. FTC showed good performance in the anticipation of water level fluctuation to maintain water level near the setpoint, but faced difficulty in heavy rainfall event especially in heavy rain season. During dry season, the FTC showed better performance and ability to maintain water level near the desired level. The simulation was conducted using spreadsheet programmed with macro basic language. The simulation also gave the irrigation and drainage capacity of 1.3 lt/sec.ha for rainy season and1.6 lt/sec.ha for dry season, with each performance index of 11871.5 and 4225.4, which values are the results of optimization during the simulation.