COG defuzzification

J Sikdar Banerjee (eeejbane@livjm.ac.uk)
Thu, 3 Jun 1999 15:22:08 +0200 (MET DST)

Hello,

I have a question on COG defuzzification.
For a discrete universe of discourse, say

Output of Rule 1 is a triangular set

whose mu is | 0 | 0.5 | 1 | 0.5 | 0 |
|---|-----|---|--- -|---|
and support points are | -2| -1 | 0 | 1 | 2 |

Output of Rule 2 is a triangular set

whose mu is | 0 | 0.5 | 1 | 0.5 | 0 |
|----|-----|----|-----|----|
and support points are |-1.5|-0.5 | 0.5| 1.5 | 2.5|

How can I aggregate them and defuzzify them, say using max and COG
method?

Till now, I've been calculating the final output as

0 * 1 + 0.5 *1
= _______________
1+1

Any suggestions?

Thanks

Jay

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