一种内编队卫星脉冲阈值轨道控制方法

A Pulse Threshold Orbit Control Method for Inner Formation Satellite

针对内编队卫星由于内外卫星受摄差异产生的相对轨道运动,需要进行编队构型维持以避免内外卫星碰撞,提出一种脉冲阈值相对轨道维持方法。该方法设计了一种周期启动式脉冲阈值控制器,根据内外卫星质心的相对位置与距离阈值以及线性化相对轨道运动动力学模型计算施加的脉冲冲量,采用蒙特卡洛方法模拟内外卫星存在状态估计偏差,并在相同条件下对比两种连续控制方法。结果表明该方法在控制精度、燃料消耗和受测量误差影响程度上能取得良好的平衡,能够有效降低状态偏差对燃料消耗带来的不确定性,可应用于内编队卫星长期在轨低燃料消耗的编队构型维持,也可应用于一般编队卫星构型维持与行星伴飞。

A pulse threshold relative orbit control method is proposed to address the issue of maintaining the formation configuration of inner formation satellite in case of collision due to the perturbation difference between internal and external satellite.A periodic-start pulse threshold controller is designed,and the applied pulse impulse is calculated based on the relative position and threshold of the inner and outer satellite centroids as well as the linearized relative orbital motion dynamics model.The Monte Carlo method is used to simulate the state estimation bias of the inner and outer satellite,which is compared with two continuous control methods under the same conditions.The results show that a good balance can be achieved by using this method regarding control accuracy,fuel consumption,and the influence of measurement error,which can effectively reduce the uncertainty caused by state deviation on fuel consumption and can be applied to the maintenance of formation configurations of inner formation satellite with low fuel consumption in orbit for a long time.The proposed method can also be applied to the maintenance of general formation satellite configurations and planetary companion flights.