Abstract

The new communication satellites are tricky in a control point of view, since their conceptions have several sources of flexibilities: solar arrays and antennas which can be very large with respect to the main body and may lead to degradation of the performance of spacecraft attitude. This work aims to present a composite disturbance observer based controller (CDOBC) for flexible spacecraft is proposed to enhance the disturbance attenuation performance. The controller contains a composite disturbance observer (CDO) and a state feedback controller (SFC) plus feed-forward. First, the disturbance in the system is equivalent to two parts: slow varying disturbance and periodic disturbance control scheme. Thus, the disturbance can be modelled by a state equation and estimated by CDO according to the attitude rates. Then, the feed-forward is adopted to compensate the estimated disturbance and the state feedback controller is adopted to stabilize the system and restrain the residue disturbance. The simulation results demonstrate the effectiveness of the proposed method.

中文翻译：

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具有柔性振动的侧倾/偏航姿态卫星稳定主动控制设计方法

摘要

从概念上讲，新的通信卫星非常棘手，因为它们的概念具有多种灵活性：太阳能电池板和天线相对于主体可能很大，并可能导致航天器姿态性能下降。这项工作旨在提出一种用于挠性航天器的基于复合干扰观测器的控制器（CDOBC），以提高干扰衰减性能。该控制器包含一个复合干扰观测器（CDO）和一个状态反馈控制器（SFC）以及前馈。首先，系统中的扰动等效于两个部分：缓慢变化扰动和周期性扰动控制方案。因此，可以通过状态方程对干扰进行建模，并根据姿态率通过CDO进行估计。然后，采用前馈来补偿估计的干扰，并采用状态反馈控制器来稳定系统并抑制残留干扰。仿真结果证明了该方法的有效性。