卫星编队飞行相对绕飞控制策略

Relative Fly-Around Control Strategy for Satellite Formation Flying

提出了一种能考虑复杂摄动模型的卫星编队飞行相对绕飞控制策略,该策略仅需进行切向和法向控制,控制律不需要改变推力大小和方向,不需要进行卫星的姿态机动,适用范围广。对绕飞角、绕飞中心、绕飞基线等编队构形参数的控制精度高,对绕飞角的控制误差可达0.05°以下,绕飞挠率控制到0.001以下。此外,绕飞中心、绕飞角、绕飞基线、最小距离、最大距离均可稳定地保持,控制后编队构形稳定性好,有利于延长保持控制的周期,节约推进剂的消耗。该策略首次实现了对绕飞中心和绕飞挠率的控制。

A relative fly around control strategy with sophisticated perturbation for satellite formation flying is presented.The control of along-track and cross-track maneuvers is only required in the proposed strategy.The attitude,the size and the direction of the thrust don＇ t need to change when the control strategy is executing.The parameters of formation configuration,including fly around angle,fly around center,fly around baseline and etc,have high precision in this control strategy.The warp of the fly around angle is less than O.05 degree after control,and the fly around torsion is less than O.001 after control.Besides,the stability of formation configuration is fine.The fly around center,the fly around angle,the fly around baseline,the minimum relative distance and the maximal relative distance can keep for along time.Therefore,the control period can be extended and the propellant can be economized.The relative fly around control strategy realizes the control of the fly around center and the fly around torsion for the first time.