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星间激光通信中,由粗跟踪系统和精跟踪系统组成的复合轴系统完成了系统的大范围、高精度跟踪任务。对复合轴系统进行了基于Z变换的数字模拟以研究其带宽设计。根据计算的卫星轨迹和粗跟踪系统机械误差,得到了粗跟踪系统的带宽设计结果;给出了粗跟踪系统和精跟踪系统的配合工作关系;得到了精跟踪系统的带宽设计结果;最后研究了在中高频扰动下,复合轴系统的带宽设计。以上结果为星间激光通信中的复合轴系统控制系统设计提供了重要依据。
In the intersatellite laser communication, a complex axis system consisting of a rough tracking system and a fine tracking system completes the system’s large-area and high-precision tracking task. A digital simulation based on Z transform was carried out on the composite axis system to study its bandwidth design. Based on the calculated satellite trajectory and the mechanical error of the coarse tracking system, the design results of the bandwidth of the coarse tracking system are obtained. The working relationship between the coarse tracking system and the fine tracking system is given. The bandwidth design results of the fine tracking system are obtained. Finally, In the middle and high frequency disturbance, the bandwidth of the composite shaft system design. The above results provide an important basis for the design of the control system of composite shaft system in intersatellite laser communication.