Modeling and robust H-infinite control of a novel non-contact ultra-quiet Stewart spacecraft
Modeling and robust H-infinite control of a novel non-contact ultra-quiet Stewart spacecraft
复制标题
新型非接触式超静音斯图尔特航天器的建模和鲁棒 H 无限控制
DOI：
10.1016/j.actaastro.2014.11.033
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发表时间：
2015
影响因子：
3.5
通讯作者：
Wang Yue
中科院分区：
文献类型：
--
作者：
Xu Yufei;Liao He;Liu Lei;Wang Yue
研究了一种新型超安静航天器的建模和鲁棒H∞控制问题，该航天器采用非接触Stewart平台主动控制其支撑模块（SM）和有效载荷模块（PM）。SM和PM在机械上分离，因此SM的干扰和振动可以得到完美的抑制。然而，这种新型航天器具有内部不稳定性。为了克服这种不稳定性，本文首先采用牛顿-欧拉法建立了非接触Stewart航天器的动力学模型。在此基础上，设计了混合灵敏度鲁棒H∞控制器，以保证姿态稳定和精确指向。最后，仿真研究提供了验证所提出的方法的有效性。
This paper presents the modeling and robust H∞control of a novel ultra-quiet spacecraft which employs the non-contact Stewart platform to actively control its support module (SM) and payload module (PM). The SM and PM are mechanically separated such that the disturbances and vibrations from the SM can be perfectly suppressed. However, this novel spacecraft has internal instability. To overcome the instability, this paper derives the dynamics model of the non-contact Stewart spacecraft using Newton–Euler approach at first. Then, the mixed sensitivity robust H∞control is developed to guarantee both the attitude stability and precision pointing. Finally, simulation studies are provided to validate the effectiveness of the proposed approach.