为了模拟轨道运动对激光通信终端PAT系统性能的影响，研制了高精度一维转台。分析了GEO-LEO、LEO-LEO卫星相对运动角速度，据此提出转台角速度范围的需求；以控制器数字控制技术为基础，采用复合控制和高阶输入串联校正的方式实现超低速的平稳控制；分析转台角位置定位精度检测过程中，调整、对准误差对检测精度的影响，实现高精度检测。结果表明，转台最大角速度为2 (°)/s，调整、对准误差引起的角位置定位精度测量误差可以忽略，实测转台定位精度优于2.5″。转台满足高精度、低转速的空间激光通信终端轨道模拟要求。

In order to simulate the effect of orbital motion on the laser communication terminal′s PAT system performance, a high precision one dimensional turntable was developed. GEO-LEO and LEO-LEO satellite relative motion angular velocities were analyzed, and the requirement of turntable′s angular velocity range was proposed accordingly. Based on the digital control technology, compound control and high level input cascade compensation were used to achieve the stable control with super-low speed. To meet high precision demand in angular location accuracy measurement, the influence of adjustment and alignment error in test procedure was studied. According to the results, the max turntable angular velocity was 2 (°)/s; the angle position measurement error of adjustment and alignment error could be ignored; the actual turntable position precision was superior to 2.5″. The turntable meets the requirements of high-precision and low-speed for the orbital simulation of space laser communication terminal.