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.

Using the servo oscillating reflector antenna based on the rotating paraboloid principle,one- tomany laser communication network can capture,track and communicate with the laser signal coming from multipoint optical transceiver so as to form the space laser communication network.The basic principle,architecture,tracking algorithm and the stitching technology of the servo antenna system are discussed.The rotating paraboloid principle is proved and the feasibility analysis of servo mirror antenna is given.It also introduces the closed-loop structure of tracking system and separately elaborates the component and index of the sensor,actuator,controller.Proportion integration differentiation (PID) algorithm with actuator limit,which is used for spot tracking,and debugging method are given.In order to achieve continuous tracking,the multi-reflector stitching technology is introduced,which mainly clarifies the implementation method of the reflectors.The whole servo antenna system is designed to test the perform range,tracking precision and stitching reliability.In the end,the qualification including 360° omnidirectional execution,tracking error less than 50 mrad and over 90% reliable stitching under indoor principle experiment can be achieved,which makes the laser communication network system operate normally .