How to Merge two rules in Fuzzy Logic

For example if I have 2 inputs and one output as follows

Inputs: Food {Excellent, Good, Average, Bad}, Service{Good, Bad}
Output: Tip

and I have 2 rules as

If Food is good and Service is good then Tip is good

If Food is average and Service is good then Tip is good.

Can I combine the above 2 rules into one rule as

If ((Food is good) or (Food is average)) and Service is good then Tip is good. If it is possible what is the format?

Answer 1

[Walter Roberson]

If (Service is bad or Food is bad) then Tip is bad else Tip is good

[Sampath]

Thank you Walter but I was looking at something else. Let me rephrase my question.

Inputs: Food {Excellent, Good, Average, Bad}, Service{Very Good, Good, Average, Bad}, Ambiance {Good, Average, Bad}

Output: Tip {Very Good, Good, Average, Bad}

Rules:

1) If Food = Good & Service = Good & Ambiance = Good Then Tip = Good

2) IF Food = Average & Service = Good & Ambiance = Good Then Tip = Good

And I'm feeding these rules to the Fuzzy Logic Rule Editor. How do I add an Else case in Fuzzy Logic Rule Editor.

Thanks in Advance.

Answer 2

[Shehbaz Aslam]

Hope all of you are doing well. I need help on fuzzy logic. I have three inputs SOC,Sloar and wind. On the basis of these inputs I want to create rule base for three modes. Emergency, energy saving and normal mode. How I can define rules. Thanks in advance