The fuzzy logic must keep the gas throughput at the set point and it has to respond to set point changes with the correct dynamic speed. The set point can vary from 70% (partial load) to 100% (full load). The fluctuations of the gas throughput result mainly from variations of the coal quality (humidity, ash content and granularity). These effects have to be compensated by the fuzzy logic.
The process stabilization must keep several process parameters in the optimum range. The reactor load influences the optimum of these process parameters. The position of the optimum also depends on the coal quality.