Hi Asho,
In order to import your FCL controller to fuzzylite, you need to perform the following changes:
(1) Change comments indicators // to # (this is a temporary fix until next version).
(2) ACCU : MAX; goes in Defuzzify tip instead of RULEBLOCK (as mentioned before)
(3) Each rules needs to be presented in a single line (not across multiple lines)
(4) In rules, change the case of the keywords if, then, with to lower case.
These changes will let you import your FCL into fuzzylite. However, please have in mind that you should also specify:
(1) The range of input and output variables (standard in FCL). By default, fuzzylite will assume (-inf .. inf)
(2) Explicitly define the Disjunction operator (OR) in Ruleblock. If not defined, fuzzylite will take NULL as operator, and since you use or within the rules, fuzzylite will remind you to select one during its operation.
The following is the FCL code of your engine exported using fuzzylite. Have in mind that ENABLED is an extension to FCL which gives you the option to disable a variable or rule block (useful for testing purposes).
FUNCTION_BLOCK tipper
VAR_INPUT
service: REAL;
food: REAL;
END_VAR
VAR_OUTPUT
tip: REAL;
END_VAR
FUZZIFY service
ENABLED : TRUE;
RANGE := (-inf .. inf);
TERM poor := (0.000, 1.000) (4.000, 0.000);
TERM good := (1.000, 0.000) (4.000, 1.000) (6.000, 1.000) (9.000, 0.000);
TERM excellent := (6.000, 0.000) (9.000, 1.000);
END_FUZZIFY
FUZZIFY food
ENABLED : TRUE;
RANGE := (-inf .. inf);
TERM rancid := (0.000, 1.000) (1.000, 1.000) (3.000, 0.000);
TERM delicious := (7.000, 0.000) (9.000, 1.000);
END_FUZZIFY
DEFUZZIFY tip
ENABLED : TRUE;
RANGE := (-inf .. inf);
TERM cheap := (0.000, 0.000) (5.000, 1.000) (10.000, 0.000);
TERM average := (10.000, 0.000) (15.000, 1.000) (20.000, 0.000);
TERM generous := (20.000, 0.000) (25.000, 1.000) (30.000, 0.000);
METHOD : COG;
ACCU : MAX;
DEFAULT := 0.000;
END_DEFUZZIFY
RULEBLOCK No1
ENABLED : TRUE;
AND : MIN;
ACT : MIN;
RULE 1 : if service is poor or food is rancid then tip is cheap
RULE 2 : if service is good then tip is average
RULE 3 : if service is excellent and food is delicious then tip is generous
END_RULEBLOCK
END_FUNCTION_BLOCKAlthough I do prefer the FuzzyLite Language (FLL):
Engine: tipper
InputVariable: service
enabled: true
range: -inf inf
term: poor Discrete 0.000 1.000 4.000 0.000
term: good Discrete 1.000 0.000 4.000 1.000 6.000 1.000 9.000 0.000
term: excellent Discrete 6.000 0.000 9.000 1.000
InputVariable: food
enabled: true
range: -inf inf
term: rancid Discrete 0.000 1.000 1.000 1.000 3.000 0.000
term: delicious Discrete 7.000 0.000 9.000 1.000
OutputVariable: tip
enabled: true
range: -inf inf
accumulation: Maximum
defuzzifier: Centroid 200
default: 0.000
lock-valid: false
lock-range: false
term: cheap Discrete 0.000 0.000 5.000 1.000 10.000 0.000
term: average Discrete 10.000 0.000 15.000 1.000 20.000 0.000
term: generous Discrete 20.000 0.000 25.000 1.000 30.000 0.000
RuleBlock: No1
enabled: true
conjunction: Minimum
disjunction: none
activation: Minimum
rule: if service is poor or food is rancid then tip is cheap
rule: if service is good then tip is average
rule: if service is excellent and food is delicious then tip is generous