Abstract: By using the existing research result of visual three dimensional furnace temperature field, the radiant energy signal in furnace, as a middle controlled variable, had been introduced and used to form a cascade control system. The genetic algorithm was adopted to optimize the fuzzy controller, and its control strategy was applied in the steam pressure control subsystem of the combustion control system. The simulation experiment was carried out, and the result verified the feasibility of the algorithm.

Key words: furnace radiant energy signal, fuzzy control, combustion control system, combustion rate, once through boiler