重力测量卫星三轴稳定模型预测控制方法

Model predictive control approach to three-axis stabilization of gravity field satellite

基于卫星重力测量姿态控制任务需求,提出了一种基于模型预测控制的三轴姿态稳定控制方法。给出了将控制力矩和扰动力矩分别作为控制变量和测量扰动的线性化方程,并将推力大小及其变化量作为约束条件。基于离散化状态方程,提出了满足多种约束条件的预测控制方法。通过数学仿真表明了模型预测方法对内编队卫星三轴稳定控制的有效性和可行性。

A solution for the three-axis stabilization control problem of the gravity field satellite is presented based on model predictive techniques.The linearized attitude dynamics is given considering the control moment as manipulated variable and exogenous disturbances as measured disturbances,constrained by propulsion system activity（force and its rate）.On basis of the established discrete spaces equation,a predictive control method considering constrains is proposed.Simulation results show that the model predictive control is effective and feasible for three-axis stabilized control of an inner formation satellite.