On the precision of the plant estimates in some subspace identification methods

On the precision of the plant estimates in some subspace identification methods
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几种子空间辨识方法中植物估计的精度研究

DOI:
10.3182/20140824-6-za-1003.02167
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发表时间:
2014
期刊:
IFAC Proceedings Volumes
影响因子:
--
通讯作者:
K. Ikeda
K. Ikeda
中科院分区:
--
文献类型:
--
作者:
K. Ikeda

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PI-MOESP,PO-MOESP和N4SID方法之一的估计估计误差的主要部分的抽象显式公式是基于提出的对奇异子空间的扰动的提议而得出的。通过考虑真实和扰动的奇异子空间之间的差距,而不是子空间上的扰动,可以获得估计误差的简单公式。还分析了从属项的顺序。
Abstract Explicit formulae of dominant parts of the estimation errors of plant A matrix in PI-MOESP, PO-MOESP, and one of N4SID methods are derived based on a proposing lemma on perturbations to the singular subspaces. By considereing a gap between the true and a perturbed singular subspaces instead of the perturbation on the subspace, a simple formulae of the estimation error is obtained. The order of the subordinate terms are also analysed.