星间光通信精跟踪系统的模糊自整定PID控制及仿真实验

Fuzzy self-tuning PID control and simulation experiment of fine tracking system in optical communication between satellites

摘要:

在星间光通信技术中，精跟踪系统对于整个光通信链路的建立和保持至关重要。本文针对精跟踪系统的被控对象——快速反射镜建模得出传递函数，在此基础上进行参数辨识而得出完整的数学模型。采用模糊自整定PID控制器来优化控制效果，提升对扰动的抑制能力。通过Simulink仿真实验对二者的控制性能进行了对比，并在仿真过程中加入扰动量以试验二者的鲁棒性。仿真实验结果表明：模糊自整定PID控制器在精跟踪系统的控制过程中有显著的扰动抑制能力。

Abstract:

In the technology of intersatellite laser communication, fine tracking system is very important for the establishment and maintenance of the entire optical communication link. In this paper, the transfer function of the controller object of the fine tracking system, the fast steering mirror is modeled, and the complete mathematical model is obtained based on the parameter optimize the control effect and improve the disturbance suppression ability. The control performance of the two is compared by Simulink, and the disturbance is added in the simulation to test the robustness of the controller. The simulation results show that the fuzzy self-tuning PID controller has significant disturbance suppression ability in the control process of fine tracking system.