2. 1 Self-setting principle of fuzzy PID parameters
According to the error of the controlled device
response on the sampling time (E) and the change
rate of the error (EC), the PID parameters/polarity
and magnitude are determined. The static performance
and dynamic performance of the controlled device
response are considered at the same time.
Guideposts are fuzzificated by corresponding rule
sets. And the corresponding parameter amendment
is available if there is the same rule in the knowledge
base[7-9]. Fig. 2 shows self-setting process of fuzzy