ABSTRACT
The basic idea of fuzzy logic control (FLC) was introduced by Zadeh in 197334 and then applied by Mamdani15 in an attempt to control systems that are structurally too complex to model. Since then, FLC has become one of the most active and fruitful research areas in fuzzy mathematics and fuzzy systems theory, with many industrial applications reported.6,10 The experience gained over the past three decades has shown that FLC may offer a preferable method for designing controllers for dynamic systems, even in most cases where traditional methods can be used. 16
FLC can be classified into many different types.30 The error feedback control is one of the most popular types studied extensively, which is named conventional FLC in this chapter. This conventional FLC usually uses the PID type structures for low-level contro1.4 Just like its linear counterpart, there are PD-type FLC (FZ-PD),20 PI-type FLC (FZ_PI),33 and various PID-type FLC (FZ_PID),17,21,27 aiming at different applications.
