Research of fuzzy PID control strategy of industrial boilers'water level

Abstract：Water lever is the important index to ensure the safety and stable operation of the boilers.The dynamics of boiler lever are influenced by load exciation, voltage, fuel quantity, and some other facfors.Conventional PID control is often used in present industrial field and the tuning results are difficult to meet the demands.Thus, it leads to system unstable, or even out of control.In order to solve this problem, a fuzzy on line PID self*.tuning control strategy is proposed.This control strategy is more useful.

Keyword：industrial boilers;water lever of steam cylinders;fuzzy PID control strategy;on line self tuning for PID parameters;