FUZZY FEEDBACK CONTROLLER

摘要

PURPOSE:To improve the control conformity and the damping performance and to suppress the overshoot with a fuzzy feedback controller by securing the control performance equivalent to the PI control and attaining the change of a control parameter and the non-linear PI control. CONSTITUTION:The deviation (e) between the process value (x) and the set value (r) and the change value DELTAe of the deviation (e) are calculated by an arithmetic storage 11 and then normalized by the normalizing devices 13 and 14. A fuzzy inference arithmetic device 15 carries out a fuzzy inference based on the normalized deviation (e) and change value DELTAe, a control rule and a membership function 16 and obtains the control output change value DELTAu. This value DELTAu is normalized by a normalizing device 18 and added to the precedent control output by an adder device 19. Thus the present control output (u) is decided and added to an operating device 20. A parameter adaptation device 17 secures the adaptation of the parameters A-C respectively based on the response waveform of the process value.