Design of signed distance method based fuzzy logic controller for TITO process

MIMO Systems are complicated as the reciprocal action (interaction) between the Manipulated Variable and Controlled Variable is very high. On adjustment, the loops controlling parameters effects each others performance leading the whole system towards instability. To overcome this difficulty, it is crucial to design a unique control approach which minimizes or removes the interaction efficiently, thus making the system stable. This research paper presents the design of signed distance method based Fuzzy Logic Controller, implemented on Industrial Scale Polymerization (ISP)Reactor which is the modified strategy to design a Conventional Fuzzy Logic Controller (CFLC). The signed distance method imparts only a single input (known as Single Input Fuzzy Logic Controller) by reducing the pair of inputs (error and its derivative) of the traditional Fuzzy Logic Controller which is the biggest advantage of this advanced approach. It also shows noteworthy reduction in the rule base table which makes the tuning of control variables easy. Finally, the comparison is been done based on the results obtained by the SIFLC based modified approach with the results obtained by the Direct-Synthesis PID Controller and traditional Fuzzy Logic Controller.