空间激光通信组网反射镜联动跟踪控制技术

为提高光学天线能量利用效率,实现空间激光通信组网,本文对反射镜联动跟踪控制技术展开研究。首先,阐述了系统组成原理,详细论述了基于单探测器多执行器的反射镜联动跟踪控制策略。接着,通过分析激光链路能量,得到了联动跟踪约束条件及误差要求。然后,建立了双反射镜联动跟踪数学模型,对伺服控制器进行仿真。最后,搭建原理样机对跟踪性能进行测试。实验结果表明,系统能够对目标进行稳定跟踪,跟踪脱靶量精度优于83μrad,双镜联动精度优于26μrad,系统接收光功率显著提高。本文研究为实现空间一对多激光通信链路组网奠定了基础。

Linkage tracking control technology of space laser communication network mirror

In order to improve the energy utilization efficiency of the optical antenna and realize the space laser communication networking,we study the mirror linkage tracking control technology.The principle of system composition is described,and a mirror linkage tracking control strategy based on a single-detector multi-actuator is discussed in detail.By analyzing the energy of a laser link,its linkage tracking constraints and error requirements are obtained.A mathematical model of double mirror linkage tracking is established.The servo controller is designed and simulated,and the prototype is built to test its tracking performance.The experimental results show that the system can track the target stably,the tracking target accuracy is better than 83μrad,the double mirror linkage accuracy is better than 26μrad and the received optical power of the system is significantly improved.The research in this paper lays a foundation for space one-to-many laser communication link networking.