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I have created a fuzzy rulebase for a project.I am currently testing to see if the rules work. I am trying to explicitly test Rule 7 from the below given rules (though the fuzzy controller has all the rules written in them). 

    RULE 7 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND room IS poor THEN trustWeight IS medium;

I am planning to keep the "hotelClass", "travllerType" constant while only changing the "room" values to check how the output behaves. The code for that is:

for (double room = 0.0; room <= 10; room += 0.1) {
            fis.getVariable("room").setValue(room);
            fis.getVariable("hotelClass").setValue(5);
            fis.getVariable("travellerType").setValue(travellerType);
            fis.evaluate();

            // Print result & update plot
            System.out.println(String.format("Room: %2.2f\t=> tweight: %2.2f ", room, fis.getVariable("trustWeight").getValue()));
        }

But it seems that when I have all my rules in place, the rules dont get hit, leaving the output fuzzy set values to remain at 0. But I have no problem, when my fuzzy controller only has that one rule.

These are my rules from the original controller file:

RULE 1 : IF hotelClass IS aboveAverage AND travellerType IS businessMan AND room IS poor THEN trustWeight IS high;
    RULE 2 : IF hotelClass IS aboveAverage AND travellerType IS businessMan AND service IS poor THEN trustWeight IS high; 
    RULE 3 : IF hotelClass IS aboveAverage AND travellerType IS businessMan AND room IS excellent THEN trustWeight IS less;
    RULE 4 : IF hotelClass IS aboveAverage AND travellerType IS businessMan AND service IS excellent THEN trustWeight IS less;
    RULE 5 : IF hotelClass IS aboveAverage AND travellerType IS businessMan AND room IS good THEN trustWeight IS medium;
    RULE 6 : IF hotelClass IS aboveAverage AND travellerType IS businessMan AND service IS good THEN trustWeight IS medium;

    RULE 7 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND room IS poor THEN trustWeight IS medium;
    RULE 8 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND service IS poor THEN trustWeight IS medium;
    RULE 9 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND room IS excellent THEN trustWeight IS medium;
    RULE 10 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND service IS excellent THEN trustWeight IS medium;
    RULE 11 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND room IS good THEN trustWeight IS high;
    RULE 12 : IF hotelClass IS aboveAverage AND travellerType IS familyMan AND service IS good THEN trustWeight IS high;

Additional information :

  • I am making use of "Center Of Gravity" defuzzification method to obtainvalues for the "trustweight"
  • My fuzzy variables and sets are given below as well

enter image description here

Can anyone tell me what or where I am going wrong? Any comments, pointers, explanations etc, will really help.

Kripa Jayakumar
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1 Answers1

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Have you tried making sure there are no contradictions in the rules? What would happen if the room was poor and the service was excellent?

Mele
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