2. 2 Self-regulating model of fuzzy PID parameters
The core of designing the fuzzy PID controller is
to set up the proper fuzzy rules model of the controlled
process by summing up expert experience and
knowledge. Proportion factor (Kp ) , integrating element
(K]) and differential element (KD ) are the
base parameters, affecting the PID performance. K p
can accelerate the system response and improve the
adjustment accuracy. K] can eliminate the steadystate
error of the control system. And KD can improve
the dynamic state performance of the control system[IO].
According to technology features and operating
experiences of continuous casting, three sets of fuzzy
rules are established. Table 1 to Table 3 show detail.