一种用于航天器姿态跟踪的鲁棒周期控制器
A Robust Periodic Controller for Spacecraft Attitude Tracking
AI总结:
本文针对卫星姿态跟踪提出一种结构化线性时周期输出反馈鲁棒控制器,通过凸优化综合避免经典周期H∞方法的网格评估,并在太阳能电站卫星上验证了其有效性。
摘要:
本文提出了一种用于卫星鲁棒周期姿态控制的新方法。在综合设计中尊重卫星动力学的周期性,可以在整个轨道上实现恒定的性能和鲁棒性要求。所提出的设计采用混合灵敏度控制设计,并使用物理驱动的加权方案。控制器通过一种新颖的结构化线性时周期输出反馈综合方法计算,并具有保证的最优L2性能。该综合方法构成一个凸优化问题,避免了经典周期H∞综合中固有的耦合条件逐网格评估。此外,该控制器具有透明且易于实现的结构。以一个太阳能电站卫星为例,验证了所提方法在周期卫星姿态控制中的有效性。
英文摘要:
This paper presents a novel approach for robust periodic attitude control of satellites. Respecting the periodicity of the satellite dynamics in the synthesis allows to achieve constant performance and robustness requirements over the orbit. The proposed design follows a mixed sensitivity control design employing a physically motivated weighting scheme. The controller is calculated using a novel structured linear time-periodic output feedback synthesis with guaranteed optimal L2-performance. The synthesis poses a convex optimization problem and avoids grid-wise evaluations of coupling conditions inherent for classical periodic H-infinity-synthesis. Moreover, the controller has a transparent and easy to implement structure. A solar power plant satellite is used to demonstrate the effectiveness of the proposed method for periodic satellite attitude control.
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