This article addresses the formation tracking control problem for multiple spacecraft systems subject to limited communication resources and external disturbances. Considering that only a subset of the follower spacecraft can have access to the motion states of the dynamic leader, an event-based distributed observer is first developed to reconstruct the leader's information. Subsequently, to achieve the accompanying flight of the follower spacecraft around the leader with a desired formation configuration, for each follower spacecraft, a distributed event-triggered coordinated controller is proposed. In particular, by embedding simultaneously the position information and observer output into the triggering function, a novel unified event-triggered mechanism is designed to schedule information transmission in multiple spacecraft systems. The salient characters of the distributed coordinated control scheme are twofold: unnecessary occupancy of communication resources can be avoided significantly; and asymptotic stability of the whole closed-loop system is guaranteed without resorting to the separation principle. Finally, numerical simulations are carried out to illustrate the efficiency of the theoretical results.

中文翻译：

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基于事件触发通信的基于观测器的航天器编队协调控制

本文解决了受有限通信资源和外部干扰影响的多航天器系统的编队跟踪控制问题。考虑到只有一部分跟随者航天器可以访问动态领导者的运动状态，因此首先开发了基于事件的分布式观察器来重建领导者的信息。随后，为了实现跟随航天器以期望的编队配置围绕领导者飞行，对于每个跟随航天器，提出了分布式事件触发协调控制器。特别是，通过将位置信息和观测器输出同时嵌入到触发函数中，设计了一种新颖的统一事件触发机制来调度多个航天器系统中的信息传输。分布式协调控制方案的显着特点有两个：可以显着避免不必要的通信资源占用；并且不借助分离原理，保证了整个闭环系统的渐近稳定性。最后，进行数值模拟以说明理论结果的有效性。