Fuzzy logic

Initially a theory, today fuzzy logic has become an operational technique. Used alongside other advanced control techniques, it is making a discrete but appreciated appearance in industrial control automation systems.
Fuzzy logic does not necessarily replace conventional control systems.
Rather it completes such systems. Its advantages stem from its ability to:
- formalise and simulate the expertise of an operator or designer in process control and tuning,
- provide a simple answer for processes which are difficult to model,
- continually take into account cases or exceptions of different kinds, and progressively incorporate them into the expertise,
- take into account several variables and perform “weighted merging” of influencing into variables.
How does this technique contribute to industrial process control? What is the effect on product quality and manufacturing cost?
Following a few basic theoretical notions, this Cahier Technique answers the questions asked by automatic control engineers and potential users by means of industrial examples, in terms of implementation and competitive advantages.