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考虑到无线光通信的捕获、瞄准和跟踪(ATP)系统对信标光斑实时、准确跟踪的需求,采用具有高频、大幅度补偿能力的音圈电机作为精跟踪执行部件,以此搭建了基于PC机控制的无线光通信演示实验系统。进行了不同速度下的非机动模拟跟踪实验,分别采集、分析并评价了粗跟踪和精跟踪的跟踪误差,并实时采集了通信光光功率。实验结果表明:ATP系统的跟踪误差标准差随着模拟目标运动速度的增加而增大,误差变化范围却无较为明显的规律,系统可长时间保持通信链路;此外,粗跟踪误差曲线中多次出现的误差尖峰可能与粗大值有关。
Considering the need of real-time and accurate tracking of beacon spot by acquisition, aiming and tracking (ATP) system of wireless optical communication, a voice coil motor with high-frequency and large-scale compensation capability is used as the fine tracking actuator. Based on this, PC-controlled wireless optical communication demonstration system. The experiments of non-motorized simulation under different speeds were carried out. The tracking error of coarse tracking and fine tracking were collected, analyzed and evaluated respectively, and the optical power of communication was collected in real time. The experimental results show that the standard deviation of tracking error of ATP system increases with the increase of the moving speed of the simulated target, but there is no obvious rule of error range. The system can keep the communication link for a long time. In addition, The minor error spikes may be related to the coarse values.