Method and system for parameter self-adjustment of PID (Proportion Integration Differentiation) control system

The invention discloses a parameter self-adjusting method and system of a PID control system, and is applied to the technical field of industrial control. According to the method and the device, the first model parameter is obtained by performing optimization calculation on the at least one candidate model parameter; according to the mapping relation between the first model parameter and the target parameter value of the PID parameter, the target parameter value of the PID parameter is obtained through calculation, and the parameter change rate of the PID parameter is obtained through calculation according to the fuzzy theory. And the difference between the current parameter value and the target parameter value of the PID parameter and the parameter change rate are judged, and then the PID parameter is updated. Therefore, parameters of the PID control system can be adjusted in time according to changes of dynamic characteristics in the industrial production process. Therefore, the stability of the closed-loop