卫星编队飞行GPS自主导航和控制

本文提出了一般相对轨道动力学方程和用于编队飞行的GPS星栽自主导航模型和算法.同时文章也提出了用GPS伪距测量信息实现卫星编队飞行的建立和保持的自主导航控制方法.其中包括用于编队飞行建立的非线性控制律和用于编队飞行保持的线性控制律.以及相应的估计器的算法.作为这些方法的一个实际应用,文章给出了EO-1/Lantlsat 7编队飞行的自主导航控制系统的设计和实现.一般情况下最优控制律的实现是需要变推力发动机的,在没有变推力发动机的情况下,本文特别给出并验证了用冲量等价的方法实现变推力发动机替代的可行性.上述设计已经过数字仿真的验证,证实了设计的正确性和实现的可行性.

Implementation of Autonomous GPS Guidance and Control for the Spacecraft Formation Flying

The general relative orbit dynamics equation and GPS orbit observational equation onboard for spacecraft formation flying have been developed. The approach to the implementation of the autonomous ac-quisition control and autonomous maintenance control for formation flying using GPS code pseudoranges in-formation are presented. As a practical application of the models and method provided in this paper, the maintenance control of the Earth-Orbiter 1(EO-1)/Landsat 7 formation flying are designed and implemented by means of the discrete-time linear optimal output feedback control. For the actuator of the on/off type re-action jets, the implementation problem of the pulse-amplitude modulation is also studied. Simulation results of autonomous maintenance optimal output feedback control for 3-dimeusion orbit initial error status are shown. These simulation results certified the feasibility of the implementation of the autonomous maintenance control for EO-1/Landsat 7 formation flying by means of the discrete-time linear optimal output feedback control.