The invention discloses a method and a
system for adjusting a
tea leaf fixation process and a medium, and aims to realize cooperative regulation and control of
enzyme activity and
aroma substances in a fixation process. The method comprises the following steps: collecting multi-
modal sensing information in a fixation process, and carrying out
feature extraction on the multi-
modal sensing information to obtain multi-dimensional features; dynamically constructing an LSTM prediction model based on the multi-dimensional features, and outputting an
enzyme activity prediction value sequence; the
enzyme activity predicted value sequence is input into a
fuzzy PID controller for
reinforcement learning optimization, a temperature-rotating speed adjusting instruction is generated, and adjusting parameters of the controller are dynamically updated through a reward function of the
chlorophyll retention rate and the
energy consumption ratio; according to the temperature-rotating speed adjusting instruction, adjusting the hot
air temperature of each temperature area of the enzyme deactivation chamber, the rotating speed of the enzyme deactivation cylinder and the axial segmentation
wind speed; and collecting fixation end point judgment information, and terminating fixation when a preset condition is met. According to the invention, the problems of unstable quality and overhigh
energy consumption caused by parameter solidification in the traditional enzyme deactivation process are solved, and dynamic optimization and accurate control of the enzyme deactivation process are realized.