FUZZY LOGIC
Fuzzy Logic
1)Fuzzy logic invented by Lotfi Zadeh in 1965.
2) Fuzzy Logic is a form of many value logic in which the truth values of variables may be any real number between 0 and 1.
4) It handle the concept of partial truth where truth value may be in range of completely truth or completely false.
5) Fuzzy logic classical logic only permit conclusion which are either true or false
6) Fuzzy logic continuum of value between 0 and 1. This may be though as 0% to 100%.
7)Consider the example YOUNG
Age 4 is 100% Young
Age 19 is 50 % Young
and Age 40 is 0% Young
8) The motivation of fuzzy sets is provided by the need to represent such proposition as
John is vary tall.
Mary is slightly ill.
9)Fuzzy logic work with membership values in a way that mimics Boolean Logic.
Fuzzy Logic System Architecture
a) fuzzification Module.
b) Inference Engine.
c) Knowledge Base
d)Defuzzification Moudle.
Fig :Fuzzy Logic System Architecture |
a) Fuzzification Module:
This module is use to transfer system input. It's also splitting the input signal.
b) Inference Engine:
it helps in simulating the human reasoning process. That is by making fuzzy inference on the inputs and IF-THEN rules.
c) Knowledge Base :
In knowledge base , store it in IF-THEN rules that was provided by experts.
d) Defuzzification Module
In this module, transform fuzzy set into a crisp value.The membership functions always work on a same concept that is fuzzy sets of variables.
In this module, transform fuzzy set into a crisp value.The membership functions always work on a same concept that is fuzzy sets of variables.
- Application of Fuzzy Logic
5)It can be implemented in systems with various sizes and capabilities. That should be range from mall micro-controllers to large.
6) Fuzzy logic use to consumer product and control machine.It is use to deal with uncertainty in engineering.
3) Fuzzy logic use in Air conditioner , Dryers and Heaters.
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