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一对多激光通信网络通过基于旋转抛物面原理的伺服摆镜天线,对多点光端机的激光信号进行捕获、跟踪、通信,形成空间激光通信网络。论述了该伺服天线系统的基本原理、架构、跟踪算法与拼接技术,证明了旋转抛物面天线的形成原理,给出了伺服摆镜天线的可行性分析。介绍了跟踪系统的闭环架构,分别阐述了敏感器、执行器、控制器的组成及指标。给出用于光斑跟踪的带执行器限位的比例积分微分(PID)算法及调试方法。为了实现连续跟踪,引入多反射镜拼接技术,着重说明了反射镜拼接的实现方法。整个伺服天线系统以执行范围、跟踪精度、拼接可靠性为测试内容,最终实现了360°全向执行,小于50 mrad跟踪误差和室内原理实验拼接成功率大于90%的技术指标,有效地保证了激光通信网络体系的正常运行。
The one-to-many laser communication network captures, tracks and communicates the laser signals of the multi-point optical transceiver through a servo-driven mirror antenna based on the principle of rotating paraboloid to form a space laser communication network. The basic principle, architecture, tracking algorithm and splicing technique of the servo antenna system are discussed. The formation principle of the rotating parabola antenna is proved. The feasibility of the servo antenna is demonstrated. The closed-loop architecture of the tracking system is introduced, and the components and indicators of the sensors, actuators and controllers are described respectively. The Proportional Integral Derivative (PID) algorithm with actuator limit and the debugging method are given for spot tracking. In order to achieve continuous tracking, the introduction of multi-mirror splicing technology, focusing on the realization of mirror splicing methods. The whole servo antenna system with the execution range, tracking accuracy and stitching reliability as the test content finally achieved the 360 ° omnidirectional implementation, less than 50 mrad tracking error and indoor principle experiment stitching success rate of more than 90% of the technical indicators effectively ensure The normal operation of laser communication network system.