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内编队重力场测量卫星作为一种新概念的纯引力轨道飞行器,通过精密定轨和相对状态测量实现高精度地球重力场测量.其中对外卫星的控制保持编队内卫星在纯引力轨道上稳定飞行是决定测量水平的关键因素之一.针对稳态工作模式的内编队系统,研究了仅用推力器实现姿态轨道一体化控制的问题,构建了姿态非线性和共用推力器引起的姿态轨道耦合的六自由度平动和转动动力学模型,并基于约束非线性模型预测技术建立了姿轨一体化控制的二次型优化模型.通过仿真实验可知,约束非线性模型预测控制方法计算快速,能克服部分约束条件的非凸性;推力器布局合理,推力消耗低,满足内编队系统任务需求.
As a new concept of pure gravitational orbiter, the orbiting gravitational field measurement satellite can achieve high-precision measurement of the gravitational field of the earth through precise orbit determination and relative state measurement, in which the control of the external satellite keeps the stable flight of the satellite within the pure gravitational orbit within the formation One of the key factors that determine the level of measurement is aiming at the inner formation system of steady state working mode, the problem of integrated control of attitude and trajectory with only thruster is studied, and the attitude and orbit coupling caused by attitude nonlinearity and common thrusters Degree of freedom translation and rotation dynamics model, and based on the constraint nonlinear model prediction technology, a quadratic optimization model of integrated attitude and rail control is established.The simulation results show that the constrained nonlinear model predictive control method is fast and overcomes Constraints of non-convex; thruster layout is reasonable, low thrust consumption, to meet the needs of the formation mission system.