基于线性自抗扰控制的激光通信跟瞄机构机电联合仿真

Electromechanical Co-simulation of Laser Communication Tracking and Pointing Mechanism Based on Linear Active Disturbance Rejection Control

为分析空间激光通信组网从光端机跟瞄机构的性能、提高跟踪精度,对跟瞄机构的控制与仿真技术展开研究。建立跟瞄机构机械系统模型,设计基于线性自抗扰控制的控制系统;使用ADAMS和Simulink搭建机电联合虚拟样机,完成跟瞄机构跟踪性能的仿真分析。结果表明:基于LADRC的联合仿真控制系统消除了摩擦扰动造成的速度跟踪死区,跟踪精度优于传统PID控制;对频率为0.1 Hz的正弦信号跟踪误差最大值为105μrad,符合跟瞄机构的指标要求,可以作为实物样机研发的参考依据。

In order to analyze the performance of the tracking and pointing mechanism of the optical transceiver in the space laser communication network, and to improve the tracking accuracy, the control and simulation technology of the tracking and pointing mechanism were studied.The mechanical system model of the tracking and pointing mechanism was established, and the control system based on linear active disturbance rejection control was designed;the electromechanical combined virtual prototype was built by using ADAMS and Simulink, and the simulation analysis of the tracking performance of the tracking and pointing mechanism was completed.The results show that by using the LADRC-based joint simulation control system, the speed tracking dead zone caused by friction disturbance is eliminated, and the tracking accuracy is better than traditional PID control;the maximum tracking error for a sinusoidal signal with a frequency of 0.1 Hz is 105 μrad, which is in line with the tracking and pointing mechanism.It can be used as a reference for the research and development of physical prototypes.