Computational Intelligence

Approx imate Reasoning 293

ForRule3weget0.0 ∩ 0.0 = 0.0 = μ

decrease

–

greatly

for FlowChange, which means

that rule 3 does not produce any output. Rule 3 is said to have fired but not to

have been activated.

ForRule4weget0.25 ∩ 0.2 = 0.2 =

μ

increase

–

small

for FlowChange.

Note that rules 2 and 4 result in the activation of the increase

–

small fuzzy set.

Fuzzy Rules Fire in Parallel

So far, it has not been very hard to determine the set membership of various aspects

of the furnace parameters and the consequences implied by the fuzzy sets. In this

simple example, it is important to notice that all the rules were fired but only three

out of four rules were activated, ...