Study On The Cybernetic Model And The Fuzzy Control System Of The Bed Temperature Of The Circulating Fluidized Bed Boiler

Bed temperta is an importam parametet of circulating fluidized bedboiler combustion contrOl system. Thrugh the analysis on mass balance andenergy balance in the bed and freeboard, the bed temerature cyberneticmodel is established in this thesis. Three tyPes fuZZy controllers with PI aredesigned: the basic funy controllef, the self adjusting weighed coefficientfuzZy cofltfollef, the selftriing parameter hay controller. The fuzZycontrol system is sdrilatCd on the bed temPerature of the circulatingfluidized bed boiler. To imProve the quality of the control system, the fuzZycascade control systom is designed. The simulation shows that the cascadecontrol system on the bed temPefatllre with the self tUning parameter fuzZycontroller has the ideal control effects.