CHAPTER 1 INTRODUCTION 1 1 Significance of the Topic To derive the conclusions from the past conclusions fuzzy logic controllers FLC can be modeled to outvie the human-like thinking It will bring more ease to solve the control problems which are hard to depict by mathematical models It is also applicable to plants of higher-order systems The prime motive is their simplicity of operation ease of designs inexpensive maintenance low cost and effectiveness for most linear systems Zadeh has given the framework of all such systems where the fuzzy control logic was illustrated by IF THEN statements Owing to their knowledge-based nonlinear characteristics in order to control systems that contain nonlinearities control strategies must deal with the effect of all these fuzzy controllers are thrivingly applied Since most control strategies based on mathematical model are constrained in their ability to improve transient response as they have been mainly targeting on stability robustness against nonlinearity uncertainties