Future high-resolution space-based astronomical observation and remote sensing require space telescope with long focal length or space interferometer with long baseline. In these systems, multiple payloads will be placed over a large spacecraft structure and work in coordination to fulfill the mission tasks. However, structure flexibility and various disturbances present challenges for precision control of the payloads. In this article, each payload is placed on an active pointing ultra-quiet platform for simultaneous steering and active/passive vibration isolation, and the associated modeling and control problems are addressed. First, dynamic equations are formulated for a flexible spacecraft with NN platforms. In these equations, relative motion variables are used for the platforms, so that the equations are simple yet suitable for control design and analysis. Then, two typical coordination schemes for the platforms are identified, and the corresponding control goals are defined. Finally, the controllers for both the schemes are designed based on the disturbance observer technique, and their performance, including steady-state disturbance rejection and transient-state agility, is evaluated via numerical simulation.

中文翻译：

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多主动指向超静音平台航天器建模与控制


未来高分辨率天基天文观测和遥感需要长焦距的空间望远镜或长基线的空间干涉仪。在这些系统中，多个有效载荷将被放置在大型航天器结构上并协调工作以完成任务任务。然而，结构灵活性和各种干扰给有效载荷的精确控制带来了挑战。在本文中，每个有效载荷都放置在主动指向超静音平台上，用于同步转向和主动/被动隔振，并解决了相关的建模和控制问题。首先，为具有神经网络平台的柔性航天器制定动力学方程。在这些方程中，平台使用相对运动变量，因此方程简单且适合控制设计和分析。然后，确定了两种典型的平台协调方案，并定义了相应的控制目标。最后，基于扰动观测器技术设计了两种方案的控制器，并通过数值仿真评估了其稳态抗扰性和瞬态敏捷性等性能。