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鉴于编队飞行之中卫星不但对轨道有要求, 而且对姿态也有要求, 例如有的编队飞行卫星在惯性空间中有指向控制的要求, 或者相互之间有保持一定的姿态关系的要求, 同时在轨道控制过程中也需要姿态信息, 因此在编队飞行的建立过程中, 需要考虑姿态和轨道的协调控制和同步控制问题。本文提出了用于同步控制的相对轨道和相对姿态运动学和动力学模型、控制率的选择和设计以及用 GPS 的伪距和载波相位实现轨道和姿态同步实时反馈控制方法。其中包括用修改的 Rodrigues 参数实现无奇异的大姿态机动的非线性状态跟踪控制。对 EO-1/Landsat 7编队飞行的同步控制进行了数字仿真, 证实了设计的正确性和实现的可行性。
In view of the orbiting requirements of satellites in formations, there are also requirements for stances. For example, some formation flying satellites require pointing control in inertial space or have a certain attitude relationship with each other. Meanwhile, Attitude information is also needed in the control process. Therefore, coordination and synchronization control of attitude and trajectory need to be considered in the formation of formation flight. In this paper, the kinematics and dynamics model of relative orbit and relative attitude for synchronous control, the selection and design of control rate, and the real-time feedback control method of orbit and attitude synchronization using pseudorange and carrier phase of GPS are proposed. This includes nonlinear state tracking control with non-singular large-attitude maneuvering using modified Rodrigues parameters. The digital simulation of the synchronization control of EO-1 / Landsat 7 formation flight confirms the correctness of the design and the feasibility of its implementation.