Coarse and fine tracking cooperative control optimization method for capturing and tracking system of laser communication station

The invention relates to a coarse and fine tracking cooperative control optimization method for a capturing and tracking system of a laser communication station. The method comprises the following steps: step 1, carrying out initial pointing on an on-orbit target satellite; step 2, equidistant spiral scanning; step 3, performing coarse tracking; and step 4, performing coarse and fine tracking decoupling control. According to the coarse and fine tracking cooperative control optimization method for the capturing and tracking system of the laser communication station, when fine tracking is started, the deflection angle of the fast reflecting mirror serves as input of coarse tracking control, rotation of the tracking frame is continuously adjusted through the coarse tracking control, the fast reflecting mirror is made to deflect within a small range all the time, effectiveness of fine tracking is guaranteed, and the tracking efficiency is improved. Decoupling of coarse tracking and fine tracking is effectively ac