mirror of
https://github.com/marcin-szczepanski/jFuzzyLogic.git
synced 2024-12-18 16:35:27 +01:00
55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
|
/*
|
||
|
|
Example: A tip calculation FIS (fuzzy inference system)
|
||
|
|
Calculates tip based on 'servie' and 'food'
|
||
|
|
|
||
|
|
If you want to about this example (and fuzzy logic), please
|
||
|
|
read Matlab's tutorial on fuzzy logic toolbox
|
||
|
|
http://www.mathworks.com/access/helpdesk/help/pdf_doc/fuzzy/fuzzy.pdf
|
||
|
|
|
||
|
|
Pablo Cingolani
|
||
|
|
pcingola@users.sourceforge.net
|
||
|
|
*/
|
||
|
|
|
||
|
|
FUNCTION_BLOCK tipper // Block definition (there may be more than one block per file)
|
||
|
|
|
||
|
|
VAR_INPUT // Define input variables
|
||
|
|
service : REAL;
|
||
|
|
food : REAL;
|
||
|
|
END_VAR
|
||
|
|
|
||
|
|
VAR_OUTPUT // Define output variable
|
||
|
|
tip : REAL;
|
||
|
|
END_VAR
|
||
|
|
|
||
|
|
FUZZIFY service // Fuzzify input variable 'service': {'poor', 'good' , 'excellent'}
|
||
|
|
TERM poor := (0, 1) (4, 0) ;
|
||
|
|
TERM good := (1, 0) (4,1) (6,1) (9,0);
|
||
|
|
TERM excellent := (6, 0) (9, 1);
|
||
|
|
END_FUZZIFY
|
||
|
|
|
||
|
|
FUZZIFY food // Fuzzify input variable 'food': { 'rancid', 'delicious' }
|
||
|
|
TERM rancid := (0, 1) (1, 1) (3,0) ;
|
||
|
|
TERM delicious := (7,0) (9,1);
|
||
|
|
END_FUZZIFY
|
||
|
|
|
||
|
|
DEFUZZIFY tip // Defzzzify output variable 'tip' : {'cheap', 'average', 'generous' }
|
||
|
|
TERM cheap := (0,0) (5,1) (10,0);
|
||
|
|
TERM average := (10,0) (15,1) (20,0);
|
||
|
|
TERM generous := (20,0) (25,1) (30,0);
|
||
|
|
METHOD : COG; // Use 'Center Of Gravity' defuzzification method
|
||
|
|
DEFAULT := 0; // Default value is 0 (if no rule activates defuzzifier)
|
||
|
|
END_DEFUZZIFY
|
||
|
|
|
||
|
|
RULEBLOCK No1
|
||
|
|
AND : MIN; // Use 'min' for 'and' (also implicit use 'max' for 'or' to fulfill DeMorgan's Law)
|
||
|
|
ACT : MIN; // Use 'min' activation method
|
||
|
|
ACCU : MAX; // Use 'max' accumulation method
|
||
|
|
|
||
|
|
RULE 1 : IF service IS poor OR food IS rancid THEN tip IS cheap WITH 0.8;
|
||
|
|
RULE 2 : IF service IS good THEN tip IS average WITH 0.5;
|
||
|
|
RULE 3 : IF service IS excellent AND food IS delicious THEN tip IS generous WITH 0.9;
|
||
|
|
END_RULEBLOCK
|
||
|
|
|
||
|
|
END_FUNCTION_BLOCK
|
||
|
|
|