ABSTRACT
A principal characteristic of fuzzy control is that it works with linguistic rules rather than with mathematical models and functional relationships. Fuzzy logic provides an effective means of capturing the approximate and inexact nature of the real world. The fuzzy controller involves four basic operations, namely the fuzzification interface, the rule base, the inference engine, and the clefuz-zification interface. The fuzzification procedure consists of finding appropriate membership functions to describe crisp data. The kilning process is one of the most complex industrial processes to control and has, until the advent of fuzzy control, defied automatic control; However, human operators can successfully control this process using rules, the result of years of experience. In the kilning process a blend of finely ground raw materials is fed into the upper end of a long, inclining, rotating cylinder and slowly flows to the lower end, while undergoing chemical transformation due to the high temperatures produced by a flame at the lower end.
