微小卫星编队飞行仿真平台设计

Small satellite formation flying simulation platform

为了进行微小卫星编队飞行设计,设计了一个仿真平台。该仿真平台由两颗模拟卫星和控制中心组成,通过星间RF设备和网络控制器形成三节点星间网络,并可以根据需要增加模拟卫星的数量。模拟卫星载有多个物理的敏感器和执行器,能够对其性能进行测试。在此平台上设计了双星主从控制、双星协同控制、三星主从控制、三星协同控制、单星失效模式等多种控制策略。通过GPS伪距差分技术进行相对定位外场实验,给出了编队飞行控制仿真所需的相对定位精度,同时也验证了星间网络的功能和可靠性。

A simulation platform was developed to investigate small satellite formation flying. The simulation platform includes two simulated satellites and one control center, forming a 3-node inter-satellite network connected by RF devices and net controllers. More simulated satellites can be easily added when needed. The simulated satellites have many sensors and actuators to test their performance. The platform can use various control methods, including master-slave mode and cooperative mode for double satellites, master slave mode and cooperative mode for three satellites, and single satellite failure mode. Outdoor experiments of measuring the relative positions with a GPS differencing pseudo-range technique provided the accuracy for formation flying control. The reliability and performance of the inter-satellite network was also verified.