Development of level controllers based on fuzzy logic

Abstract

This paper describes the development of different kinds of level controllers based on fuzzy logic. Designs and implementations were carried out using tools from xfuzzy, a development environment that eases the different stages in the design of fuzzy inference systems. Special emphasis has been put in the on-line verification of the controller over a physical plant by means of xflab tool. Different approaches of the knowledge base were tested using xflab. Then, the results were analyzed and selected those that gave the better performance. Controllers implementations with different number of bit for input / output resolution were also carried out and analyzed. The results provide a base for the incoming development of a hardware fuzzy logic controller by means of specific hardware or by an embedded codesign system.