Multi-Frame Tracking Method Research Based On Sliding Mode Control

Space laser communication system has many advantages,Such as small size,little weight, low power consumption,communication data large capacity, data transfer rate of a high-capacity,good anti-interference ability,ect.Because of above-mentioned advantages,space laser communication is more and more attented in the field of military communications applications.In this paper,design the new control system based on laboratory APT tracking system as the foundation,optional two-axle four-frame structure and coarse and fine composite axis control system.To study the coupling of the single-detector compound axis system in a multi-frame tracking control system.Needed in the work process of the compound axis servo system of the single detector, the field of view of the coarse tracking and fine tracking switching,introducing sliding mode variable structure control when the switching of the field of view to avoid the visual field is lost in the coarse and fine tracking switching process.Design the fine tracking discrete sliding mode variable structure controller,establish the system of simulation model,simulation results show the introduction of sliding mode control,increase the control bandwidth of system, at the same time greatly improve tracking accuracy.Finally, the hardware circuit design,build a single detector composite shaft demo platform based on the original laboratory platform, and gives the system tracking effect diagram,described the practical value of the system.