星间链路天线相对姿态的地面模拟

Ground Simulation of Relative Attitude of Satellite Antennas

星间链路天线的相对姿态模拟为星间链路的测试验证提供近真实的动态姿态环境,是星间链路系统地面测试的重要组成部分。建立多个坐标系统将两颗卫星天线的位置和姿态联系起来,利用卫星星历将天线的相对姿态表示为一颗卫星天线在另一颗卫星天线坐标系中的方向向量,利用两个二轴转台实现此方向向量,最终通过控制转台的转角模拟卫星天线的相对姿态变化。同时计算天线波束的方向,分析了两颗卫星的可见性。天线相对姿态的模拟为星间链路的建立和保持提供动态测试环境。

The simulation of the relative attitude of satellite antennas provides approximately real dynamic environment for the test and validation of the inter-satellite crosslink, which is an important component of the ground test of erosslink. In order to link up the position and attitude of two satellite antennas, several coordinates are built up. While the satellite epochs are provided, the relative attitude expressed as a direction vector of an antenna in the coordinate of the other antenna, is realized by two twoaxis turntables, and the movement of the antennas is simulated by the control of the turntables. Meanwhile, the directions of the antennas beams are calculated, and the visibility of two satellites is analyzed. The simulation of the relative attitude of crosslink provides a dynamic test environment for the building and sustaining of the crosslink.