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内编队重力场测量卫星通过精密定轨和相对状态测量实现高精度高分辨率地球重力场测量。这两项技术都依赖于精密编队控制和姿态控制。稳态工作期间,要求相对位移必须控制在厘米量级内,外卫星对地定向精度优于0.1°。姿轨一体化控制的目标是利用微推力器保障稳态工作期间的科学测量。基于带推力器布局的耦合线性模型进行了内编队重力场测量卫星全推力设计。基于模型预测控制算法实现了卫星的姿轨一体化控制,仿真结果证实全推力器一体化控制方案的可行性与有效性。
Internal formation of gravity field measurement satellites through high-precision orbit determination and relative state measurement to achieve high-precision high-resolution Earth’s gravitational field measurement. Both technologies rely on precision formation control and attitude control. During steady-state operation, it is required that the relative displacement be controlled within a centimeter range, and the orientation accuracy of the outer satellite to the ground is better than 0.1 °. The goal of integrated attitude and rail control is to use micro thrusters to ensure scientific measurements during steady-state work. Based on the coupled linear model with thruster layout, the satellite full thrust design of inner formation gravity field measurement was carried out. Based on the model predictive control algorithm, the attitude and orbit integrated control of the satellite is realized. The simulation results confirm the feasibility and effectiveness of the integrated thrusters control scheme.