This document discusses fuzzy logic controller design. It describes open and closed loop control systems, as well as regulatory and tracking controllers. It then provides an overview of the basic components of a simple fuzzy logic controller, including fuzzification, rule base, inference mechanism, and defuzzification. Next, it discusses the principal design elements of general fuzzy logic controllers. Finally, it outlines two common models for representing fuzzy logic control systems: fuzzy rule-based structures and fuzzy relational equations.