空间激光通信APT系统误差信号的特性分析

Research of Characteristics of Error Signal in APT System of Space Laser Communication

针对空间激光通信的技术特点,分析说明了空间光束的捕获、对准、跟踪(APT)技术的重要性和必要性,论述了空间激光通信中APT伺服控制系统的工作流程以及四象限误差信号在控制中的作用。提出了空间激光通信APT系统中误差信号计算的数学模型,分析讨论了信号光斑大小、信号光斑相对于探测器探测面的不同位置情况以及光强分布对系统跟踪速度和精度的影响,其研究结果对科研项目的研究具有重要指导意义。

This paper analyzes the characteristic of space laser communication, and the importance and necessity of the APT system in space laser communication. The mathematical model is presented to analyze the error signal in APT system of space laser communication. Also, the influence to the tracking velocity and tracking precision of the system brought by the different size of laser beam, the relative location relationship between the laser beam and the detector, and the laser intensity distribution are discussed.