Robustness of linear feedback control systems to unmodelled high-frequency dynamics
作者:
J. O'REILLY,
期刊:
International Journal of Control
(Taylor Available online 1986)
卷期:
Volume 44,
issue 4
页码: 1077-1088
ISSN:0020-7179
年代: 1986
DOI:10.1080/00207178608933651
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A basic issue in the control of linear time-invariant plants is the effect of neglected high-frequency dynamics on the performance, in particular on the closed-loop stability, of the control system. In this paper, the robustness of various output feedback control designs, based on a reduced-order model with neglected high-frequency dynamics, is investigated using singular perturbation techniques. A general robust design rule is to avoid static output feedback for systems with unmodelled high-frequency dynamics. From a frequency-domain standpoint, the robust design rule is to avoid closing high-frequency plant loops by using strictly proper controllers or controllers with a low-pass filtering property.
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