Fuzzy-Based Temperature Controller for Culturing Mesophilic and Thermophilic Bacterial using Firing Angle

Abstract

Temperature control is an important parameter in the fields of engineering and medical Laboratory. Culturing of micro bacteria and enzymes for the purpose of medical diagnoses or process development in manufacturing industries require their optimum temperature to be monitored and control. In this research work Fuzzy logic controller was designed to control the incubator Temperature, by computing appropriate firing angle. MATLAB Simulink toolbox was used for simulation. The results show that the fuzzy logic controller tracks the optimum Temperature for culturing Mesophilic and Thermophilic bacteria at 37.5oC and 55.2oC respectively. The transient response shows an overshot of 0.5% for the two responses. The rise time were 787ms and 792ms for 310.5 Kelvin and 328.2 Kelvin respectively. The settling time for the 310.5 Kelvin response was 1s; whereas it took 2s for the 328.2 Kelvin response to attain steady state.