21-01-2013, 03:52 PM
A Presentation on Fuzzy Logic
Fuzzy.ppt (Size: 2.63 MB / Downloads: 25)
INTRODUCTION
What is Fuzzy Logic?
Problem-solving control system methodology
Linguistic or "fuzzy" variables
Example:
IF (process is too hot)
AND (process is heating rapidly)
THEN (cool the process quickly)
Advantages
Mimicks human control logic
Uses imprecise language
Inherently robust
Fails safely
Modified and tweaked easily
APPROACH
Evaluation Criteria:
Has Fuzzy Logic Been Previously Applied to a Similar Application With Success?
Is It a Multi-Variable Type Control Problem?
Do Operators and Engineers Possess Knowledge About Any Relevant Interdependencies of the Process Variables?
Can Further Knowledge About the Process Behavior Be Gained By Observation Or Experiments?
Is It Difficult to Obtain a Mathematical Model from the Process?