Water Level Control in Boiler System Using Self-tuning Fuzzy PID Controller

Abstract

In boiler control system, water level is regarded as an important process control parameter to ensure that the boiler could function efficiently. PID controller is the most used controller in controlling the water level. However, conventional PID is unable to control efficiently for the process that have high nonlinearity and high sensitivity. In this project, fuzzy logic controller plus PID control was introduced to the water level control in boiler system. The controller named as self-tuning fuzzy PID (STFPID) controller was proposed in this project to overcome the problem occurred. The controller is implemented in MATLAB and simulated in SIMULINK to analyze the performance analysis between conventional PID controller, FLC and STFPID controller. These controllers will be comparing their performance in terms of system response that includes percent overshoot (% OS), settling time (Ts) and rise time (Tr). Based on the analysis, the STFPID controller produces better performance than the PID and fuzzy logic controller in term of rise time, settling time and overshoot.