Parameter Self-Adjusting Nutation Fiber Coupling Algorithm Based on Fuzzy Control
In the single mode fiber coupling system of space laser communication,the parameters of the traditional laser nutation algorithm are fixed,which leads to the problem that the system convergence speed and convergence stability cannot be achieved at the same time.Therefore,a parameter self-adjusting nutation fiber coupling algorithm based on fuzzy control is proposed.The proposed algorithm uses a fast steering mirror(FSM)as the execution unit.According to real-time coupling energy feedback,the algorithm parameters are self-adjusted during the process of laser nutation convergence to improve the convergence speed and steady-state accuracy of the system.The simulation results show that the coupling efficiency,coupling precision and coupling speed of the parameter self-adjusting nutation coupling algorithm are better than those of the traditional laser nutation algorithm under the condition of no disturbance.Under the condition of disturbance,the traditional laser nutation algorithm only has a good suppression effect on the disturbance under certain conditions.However,the parameters of the self-adjusting nutation coupling algorithm have a good suppression effect on disturbances of 1‒20 Hz,and the proposed method displays obvious advantages in terms of coupling efficiency and coupling stability.Hence,the proposed method is more suitable for application in laser communication links.
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