Question

problem 2:

As an intelligent system engineer you are requested to design a fuzzy logic expert system to predict the body mass index for employees.

The system will take both the body mass (range: 40-130Kg) and the height (range: 140-210 cm) of the employer to provide the index value (10-60).

- use LARSEN FIS

- Use two different sets of membership functions for two different models such as one using triangular and one using Gaussian-bell membership functions.

- Provide the fuzzy rule table for the model and plot the fuzzy surface.

- Use Matlab to show the developed systems.

- Provide three testing cases showing the fired output. Indicate your inputs to the FIS when conducting each testing scenario and compare to the original mathematical model.

Answer 1

ANSWER:-

2 weight İnput ('Enter your weight (lbs), or type 0 for SI units: ' ); 3 if weight 0; 4 weight -input( 'Enter your mass (kg): ') 5 height input( 'Enter your height (m): ') 6 bmi (weight /(height.2)) 7 else 8 height input('Enter your height (ft): ') 9 bmi (Weight /(height.2)) 4.882427111 10 end 11 if (bmi <18.5); 12 disp ('You are underweight') 13 else if ((bmi > 18.5) && (bmi <= 25)); 14 disp('You are Normal') 15 else if ((bmi > 25) && (bmi <= 30)); 16 disp ('You are overweight') 17 else if ((bmi > 30) && (bmi <= 35)); 18 disp('You are classified as obese') 19 end 20 end 21 end 22 end

OUTPUT SCREENSHOT:-

Enter your weight (lbs), or type 0 for SI units: 0
Enter your mass (kg): 50
weight = 50
Enter your height (m): 1.6
height = 1.6000
bmi = 19.531
You are Normal

Enter your weight (lbs), or type 0 for SI units: 0
Enter your mass (kg): 62.5
weight = 62.500
Enter your height (m): 1.78
height = 1.7800
bmi = 19.726
You are Normal

Enter your weight (lbs), or type 0 for SI units: 0
Enter your mass (kg): 52
weight = 52
Enter your height (m): 1.8
height = 1.8000
bmi = 16.049
You are underweight

Enter your weight (lbs), or type 0 for SI units: 0
Enter your mass (kg): 90
weight = 90
Enter your height (m): 1.7
height = 1.7000
bmi = 31.142
You are classified as obese

SAMPLECODE:-

weight = input('Enter your weight (lbs), or type 0 for SI units: ');
if weight == 0;
weight = input('Enter your mass (kg): ')
height = input('Enter your height (m): ')
bmi = (weight / (height.^2))
else
height = input('Enter your height (ft): ')
bmi = (Weight / (height.^2)) * 4.882427111
end
if (bmi <= 18.5);
disp('You are underweight')
else if ((bmi > 18.5) && (bmi <= 25));
disp('You are Normal')
else if ((bmi > 25) && (bmi <= 30));
disp('You are overweight')
else if ((bmi > 30) && (bmi <= 35));
disp('You are classified as obese')
end
end
end
end