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高精度、宽带宽的激光捕获、对准和跟踪(APT)技术是自由空间激光通信的关键技术。简要的分析了APT系统的工作原理,建立了仿真的数学模型,利用Simulink语言,实现了卫星激光通信中APT过程的动态仿真,在此基础上设计了星际激光通信复合轴APT综合模拟实验系统。由该系统得出的有效抑制带宽为200～300Hz,经过粗、精两环抑制后的振动残差为1.2μrad,通过实验获得的数据与理论分析一致。仿真结果为系统的设计以及系统的可靠性提供了保证,为进一步发展空间激光通信技术提供了理论依据。
High-precision, wide-bandwidth laser capture, alignment and tracking (APT) technology is the key technology for free-space laser communications. A brief analysis of the working principle of the APT system, the establishment of a mathematical model of the simulation, the use of Simulink language to achieve the dynamic simulation of satellite laser communications APT process, based on the design of the Interstellar Laser Communication APT synthetic simulation system. The effective suppression bandwidth obtained by the system is 200 ~ 300Hz, the residual vibration after the rough and fine ring inhibition is 1.2μrad, and the data obtained through the experiment are consistent with the theoretical analysis. The simulation results provide a guarantee for the design of the system and the reliability of the system, providing a theoretical basis for further development of space laser communication technology.