采用自抗扰控制的空间激光通信精跟踪系统

摘要

The premise of the laser communication link establishment is the optical axis stabilization for space laser communication. Because the optical axis stabilization error caused by the nonlinear perturbation of the communication terminal carriers and the unknown perturbation model is greater,the active disturbance rejection control method is de-signed,and related parameters of the nonlinear state error feedback are adaptively adjusted by the fuzzy control meth-od. The experimental results show that,compared with the adaptive PID control method,the fuzzy active disturbance rejection control method can effectively restrain the nonlinear disturbance of the platform,also has better fast response speed and stronger robustness,and it can meet the steady-state accuracy requirements of the system.%空间激光通信的视轴稳定是激光通信链路建立的前提。针对通信终端载体的非线性扰动和扰动模型未知造成视轴稳态误差较大的问题，设计了自抗扰控制方法，并采用模糊控制理论自适应调整非线性状态误差反馈控制律中的相关参数。实验结果表明，与自适应PID控制方法相比，采用模糊自抗扰控制方法可以有效抑制平台的非线性扰动，并且具有较快的响应速度与较强的鲁棒性，可以满足系统的稳态精度要求。