Study Of APT Technology Of The Atmospheric Laser Communication System

Firstly, the main structure and integral parts of the atmospheric laser communication system are described in this thesis. With view to the demand of the whole system, it discusses one of the key technologies of optical communication, that is APT technology. It produces the general design and work process of APT system. Moreover, the thesis emphasis on designing the servo system of the stabilized platform and provide the experimental result.Combining the requirement and concerned optical mechanism ,in the research this paper design the hardware of the servo system and establish the system module on the basis of analyzing control theories and summarizing various control methods. It gives PID rectifying for the velocity inner link and compound control (forward+feedback) rectifying for the position link. By the discretization with double linear transformation, the state equations of the system rectification is derived. The simulation results show that the designed servo control system has satisfied the desired specification and accuracy of the system.