Uncertainty modeling and experiments in ?∞ control of large flexible space structure
Uncertainty modeling and experiments in ?∞ control of large flexible space structure
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大型柔性空间结构?∞控制的不确定性建模与实验
DOI：
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发表时间：
1997
影响因子：
4.8
通讯作者：
T. Hong
中科院分区：
文献类型：
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作者：
B. Boulet;B. Francis;P. Hughes;T. Hong
由于 LFSS 动力学的特殊性质，用于大型柔性空间结构 (LFSS) 鲁棒控制的不确定性建模方法（例如 /spl Hscr//sub /spl infin// 中的加法或乘法扰动）效果不佳。我们建议在模态坐标中使用 LFSS 动力学的左互质因式分解 (LCF)，以便在鲁棒控制设计中获得改进的稳定性裕度和性能。然后，设备不确定性被描述为解释模态参数不确定性和未建模动态的互素因子的稳定扰动。提出了基于 LFSS 实验测试台的 46 阶并置和非并置模型的 LCF 的两个多变量 /spl Hscr//sub /spl infin// 设计以及仿真和实验结果来说明该技术。
Approaches to uncertainty modeling for robust control of large flexible space structures (LFSSs) such as additive or multiplicative perturbations in /spl Hscr//sub /spl infin// do not work very well because of the special properties of LFSS dynamics. We propose the use of a left-coprime factorization (LCF) of LFSS dynamics in modal coordinates in order to get improved stability margins and performance in robust control design. The plant uncertainty is then described as stable perturbations of the coprime factors accounting for modal parameter uncertainty and unmodeled dynamics. Two multivariable /spl Hscr//sub /spl infin// designs based on LCFs of 46th-order collocated and noncollocated models of an LFSS experimental testbed are presented together with simulation and experimental results to illustrate the technique.