Design For The Drive End Of Modulating Retro-reflector Laser Communication System

With the development and breakthroughs in key technologies of laser communication technology,it has been widely used in multiple areas of society,the Modulating Retro-reflector Laser Communications System is highly concerned by the society with its unique advantages.The MRR LCS is used as study background in this paper,the construction of the core component of the system(drive end)is designed detailed,and its control system is studied deeply.Finally,the ATP technology of drive end is realized.The working principle and key technologies of the MRR LCS drive end are analyzed in this paper.According to the design requirements,the construction of the drive end are devised detailed.In order to accurately establish the drive end control system and complete offline simulation experiment,the mathematical model of the drive end is established with the method of fitting step response curve.The parameters of the correction network in control loop are designed in detail by means of root locus.Finally,the correctness of the drive end control system is verified by experimental simulation.In order to improve the tracking accuracy of the drive end to the target light,reduce the load of the drive end,the stabilizing plant control of the drive end is established by the arithmetic of strap-down stabilization in this paper.In order to avoid the noise in the digital signal is amplified when it is used in the process of the strap-down stabilization control,which will affected the tracking accuracy,the method of wavelet filtering is used to filter the angular velocity digital signal from fiber optic gyro.In order to verify the dynamic performance and the communication performance of the drive end,the experiment platform that including upper computer and lower computer is built.In addition,the dynamic performance test of drive end is completed in laboratory,and the joint experiment with the reverse modulation is completed in outdoors,the experiment verified that the drive end meets the design requirements,and the tracking accuracy to target light is less than 150 ?rad.