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带有大型网状展开天线的同步轨道移动通信卫星,一般通过卫星本体的姿态控制间接保障星上通信天线的指向精度,难以避免天线因自身安装、变形、挠性振动等引起的指向误差.提出直接利用射频敏感器测量的信标信号误差确定卫星三轴姿态,并计算天线保持目标指向所需三轴姿态角偏差,通过卫星姿态控制系统实时或离线姿态修正以保证天线指向精度.利用数学仿真方式验证算法正确性和有效性.
Synchronous orbit mobile communication satellites with large mesh antenna are usually used to indirectly guarantee the pointing accuracy of the satellite communication antenna through the attitude control of the satellite body. It is difficult to avoid pointing errors caused by the antenna installation, deformation, flexible vibration, etc. Proposed The three-axis attitude of the satellite is directly determined by the error of the beacon signal measured by the radio frequency sensor, and the deviation of the three-axis attitude angle required by the antenna to maintain the target orientation is calculated, and the attitude correction is performed by the attitude control system of the satellite in real time or offline to ensure the antenna pointing accuracy. Method validation algorithm correctness and validity.