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太空发电站作为千米级空间超大尺度柔性结构,针对其超长梁和膜结构的三轴稳定姿态控制以及地球静止轨道的定点运行,设计了一套姿态轨道控制系统。首先运用等效简化的方法将主次桁架结构进行简化,建立了简化模型,进而利用简化模型的模态信息实现了多柔性体动力学建模。分析了大尺度柔性结构在姿态和轨道方面所受到的空间扰动,主要包括太阳光压摄动、重力梯度摄动等因素,并据此设计了以电推进器为执行机构的三轴稳定的姿态控制系统和分散式的轨道控制系统。仿真估算结果表明,控制系统能够满足姿态、轨道控制要求,但燃料消耗较大。
As a large-scale flexible structure in the kilometer-class space, space power station is designed with a set of attitude and orbit control system in view of the three-axis stable attitude control of the long girder and the membrane structure and the fixed-point operation of the geostationary orbit. Firstly, the simplification of the primary and secondary truss structure is simplified by the equivalent simplified method, and the simplified model is established. Then the multi-flexible body dynamics modeling is realized by using the simplified model modal information. The spatial perturbations of the large-scale flexible structures in attitude and orbit are analyzed, including the factors of solar pressure perturbation and gravity gradient perturbation, and the three-axis stable attitude with the electric thruster as the actuator is designed Control system and decentralized orbit control system. Simulation results show that the control system can meet the attitude and track control requirements, but the fuel consumption is large.