The invention relates to a method for controlling the tobacco
drying process, which is characterized in that the whole tobacco
drying process is divided into a head stage, a middle stage, and a
tail stage; the head stage adopts an
adaptive learning temperature rising control method, a
control system automatically adjusts the temperature in the next temperature rising according to the previous
humidity control effect, and the low drum speed is adopted in the heat stage; the middle stage leads water parameters at an outlet into the
control system, forecast PID control is adopted to feed back and correct to realize the
automatic control for the temperature of the cylinder wall of a tobacco
drying cylinder; the
tail stage lowers the temperature of the tobacco drying cylinder in advance, closes a steam heater on the cylinder wall and a cyclic
hot blast heater in advance, increases the air intake speed, reduces the drawing air speed, and accelerates the drum speed. The tobacco drying process controlling means has the advantages that the influence on the
moisture content at the tobacco drying outlet caused by the nonlinearity and the large time
delay during the original tobacco drying procedure control process is overcome, the anti-interference ability is strong, various changes of operation conditions can be adapted, and the control of the
moisture content at the tobacco drying outlet can be led to achieve higher control precision.