Application of Fuzzy Logic Controller for Glycerin Bleaching Process

This paper describes the developoment of Fuzzy Logic Controller (FLC) for a glycerin bleaching process based on simulation study. This first order plus dead time (FPODT) model of the glycerin bleaching temperature is obtained using open loop step test from a glycerin bleaching pilot plant. Fuzzy PI and Fuzzy PD controller was developed to replace the existing PID controller. The performances of the controllers are measured and compared with conventional PID controller. The result shows the fuzzy logic controllers performed much better compared with a PID controller in controlling glycerin bleaching temperature.