| In the construction Air/Space/Ground integrated network layout,laser communication networking technology is the most important means to solve the high-speed communication link between satellites,and also the development direction of space laser communication in the future.Based on the requirements of new satellite constellation,small satellite constellation and other inter satellite networking communication,this paper builds a ground demonstration experiment of one to many laser communication between satellites.Taking one to many laser communication coarse tracking system as the research object,the structure,angle measurement scheme and control system of the tracking and aiming system in the coarse tracking system are mainly designed and studied.In order to meet the requirements of the function and structure of the coarse tracking system in one to many laser communication networking technology,a coarse tracking scheme is proposed,which uses three independent single mirror tracking units to adjust the optical axis.In view of the requirements of space environment adaptability and light miniaturization,on the premise of meeting the system index,the light-weight design of SLR tracking and aiming unit is carried out,which reduces the system weight and improves the system work efficiency.In order to achieve the high-precision acquisition and tracking of the coarse tracking system,a high-precision grating angle measurement scheme is designed,and the angle measurement error of the angle measurement system is analyzed and compensated.In order to realize the scanning,capturing and tracking control of the coarse tracking system,the control unit of the coarse tracking system based on the multi-channel closed-loop control method is designed,and the indoor static tracking performance experiment is carried out to verify the tracking performance of the coarse tracking system of one to many laser communication system.The analysis and experiments show that the coarse tracking system is compact in structure and can meet the requirements of multi-target,simultaneous,dynamic and duplex communication within the limited volume and quality. |
