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The Fuzzy Inference Rules ( Rule Block )

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Now we define the fuzzy inference rules (Rule Block -1 –RB1) to the first four parameters mentioned in the table no -1 as inputs with the physical quality of the water as output in the following way using Mamdani method Table -2 Output result from the application of IF –THEN rules,with membership function. Now we define the fuzzy inference rules (Rule Block -2 –RB2) to the next five parameters mentioned in the table no -1 as inputs with the chemical quality of the water as output in the following way using Mamdani method Table -3 Analyses of water quality output values Now we define the fuzzy inference rules (Rule Block -3 –RB3) to the parameters, physical and chemical as inputs with the complete quality of the water as output in the following way using Mamdani method Table -4 Analyses of water quality output values STEP: 4 Defuzzification : Defuzzification is processes to get a non fuzzy control action that best represent the possibility distribution of an inferred fuzzy control action [12]. CENTRE OF AREA METHOD The widely used COA strategy generates the centre of gravity of the possibility distribution of a fuzzy set C .The method gives . Figure-11 Graph of water quality output values In this above figure the physical parameter as input values.It shows the out put result. Figure-12 Graph of water quality output values In this above figure the chemical parameter as input values.It shows the out put result Figure-13 Graph of water quality output values 7.0 RESULT AND

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